Download SERVICE MANUAL

NO. 0148E
PM
RAS-20CNHZ2
RAM-50CNHZ2
RAS-30CNHZ2
SERVICE MANUAL
TECHNICAL INFORMATION
REFER TO THE FOUNDATION MANUAL
FOR SERVICE PERSONNEL ONLY
CONTENTS
SPECIFICATIONS ------------------------------------------------------------------- 7
HOW TO USE ---------------------------------------------------------------------- 10
CONSTRUCTION AND DIMENSIONAL DIAGRAM --------------------- 35
MAIN PARTS COMPONENT -------------------------------------------------- 37
RAS-20CNHZ2
RAS-30CNHZ2
WIRING DIAGRAM ---------------------------------------------------------------- 39
CIRCUIT DIAGRAM --------------------------------------------------------------- 41
PRINTED WIRING BOARD LOCATION DIAGRAM --------------------- 43
BLOCK DIAGRAM ----------------------------------------------------------------- 49
BASIC MODE ----------------------------------------------------------------------- 51
REFRIGERATING CYCLE DIAGRAM --------------------------------------- 64
DESCRIPTION OF MAIN CIRCUIT OPERATION (INDOOR) -------- 65
DESCRIPTION OF MAIN CIRCUIT OPERATION (OUTDOOR) ---- 71
TROUBLE SHOOTING ----------------------------------------------------------- 95
RAM-50CNHZ2
PARTS LIST AND DIAGRAM ------------------------------------------------- 110
SPECIFICATIONS
DC INVERTER
TYPE
MODEL
OUTDOOR UNIT
RAS-20CNHZ2 RAS-30CNHZ2
RAM-50CNHZ2
1ø, 220V – 230V, 50Hz
TOTAL INPUT
(W)
TOTAL AMPERES
(A)
COOLING CAPACITY
(kW)
HEATING CAPACITY
(B.T.U.)
NET WEIGHT
SYSTEM MULTI (WALL TYPE)
INDOOR UNIT
POWER SOURCE
DIMENSIONS
DUAL
(mm)
REFER TO THE SPECIFICATIONS PAGE 8.
W
745
798
850
H
248
265
650
D
175
168
298
(kg)
5.5
6.5
43
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
ROOM AIR CONDITIONER
INDOOR UNIT + OUTDOOR UNIT
MAY 2002
H.A.P.M.
SAFETY DURING REPAIR WORK
1. In order to disassemble and repair
the unit in question, be sure to
disconnect the power cord plug
from the power outlet before starting
the work.
ct
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o
c
is
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ord
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let.
Firs ower c er out
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the the po
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2. If it is necessary to replace any parts, they should be replaced with respective genuine parts for the unit, and
the replacement must be effected in correct manner according to the instructions in the Service Manual of
the unit.
If the contacts of electrical parts
are defective, replace the
electrical parts without trying to
repair them.
3. After completion of repairs, the initial state
should be restored.
4. Lead wires should be connected and laid as
in the initial state.
5. Modification of the unit by user himself should
absolutely be prohibited.
6. Tools and measuring instruments for use in repairs or inspection should be accurately calibrated in advance.
7. In installing the unit having been repaired, be careful to prevent the occurence of any accident such as
electrical shock, leak of current, or bodily injury due to the drop of any part.
8. To check the insulation of the unit, measure the insulation resistance between the power cord plug and
grounding terminal of the unit. The insulation resistance should be 1M
or more as measured by a 500V
DC megger.
9. The initial location of installation such as window, floor or the other should be checked for being and safe
enough to support the repaired unit again.
If it is found not so strong and safe, the unit should be installed at the initial location reinforced or at a new
location.
10. Any inflammable thing should never
be placed about the location of
installation.
DANGER
11. Check the grounding to see whether
it is proper or not, and if it is found
improper, connect the grounding
terminal to the earth.
– 1 –
WORKING STANDARDS FOR PREVENTING BREAKAGE OF SEMICONDUCTORS
1. Scope
The standards provide for items to be generally observed in carrying and handling semiconductors in relative
manufacturers during maintenance and handling thereof. (They apply the same to handling of abnormal goods
such as rejected goods being returned).
2. Object parts
(1)
(2)
(3)
(4)
Micro computer
Integrated circuits (IC)
Field-effect transistors (FET)
P.C. boards or the like on which the parts mentioned in (1) and (2) of this paragraph are equipped.
3. Items to be observed in handling
(1) Use a conductive container for carrying and storing of parts. (Even rejected goods should be handled in
the same way).
IC
A conductive polyvinyl bag
Conductive sponge
IC
Fig. 1. Conductive Container
(2) When any part is handled uncovered (in counting, packing and the like), the handling person must always
use himself as a body earth. (Make yourself a body earth by passing one M ohm earth resistance through
a ring or bracelet).
(3) Be careful not to touch the parts with your clothing when you hold a part even if a body earth is being
taken.
(4) Be sure to place a part on a metal plate with grounding.
(5) Be careful not to fail to turn off power when you repair the printed circuit board. At the same time, try
to repair the printed circuit board on a grounded metal plate.
Body earth
(Elimik conductive band)
Clip for connection with a
grounding wire
1M
Fig. 2. Body Earth
– 2 –
(6) Use a three wire type soldering iron including a grounding wire.
Metal plate (of aluminium, stainless steel, etc.)
Working
table
Resistor of 1 M
(1/2W)
Staple
Earth wire
Bare copper wire (for body earth)
Fig. 3. Grounding of the working table
Soldering iron
2
Grounding
wire
Screw stop at the screwed
part using a rag plate
Fig. 4. Grounding a soldering iron
Use a high insulation mode (100V, 10M
or higher) when ordinary iron is to be used.
(7) In checking circuits for maintenance, inspection or some others, be careful not to have the test probes of the
measuring instrument shortcircuit a load circuit or the like.
– 3 –
CAUTION
1.
In quiet operation or stopping the operation, slight flowing noise of refrigerant in the refrigerating cycle is
heard occasionally, but this noise is not abnormal for the operation.
2.
When it thunders near by, it is recommend to stop the operation and to disconnect the power cord plug from
the power outlet for safety.
3.
The room air conditioner does not start automatically after recovery of the electric power failure for preventing
fuse blowing. Re-press START/STOP button after 3 minutes from when unit stopped.
4.
If the room air conditioner is stopped by adjusting setting temperature, or missoperation, and re-start in a
moment, there is occasion that the cooling and heating operation does not start for 3 minutes, it is not
abnormal and this is the result of the operation of IC delay circuit. This IC delay circuit ensures that there
is no danger of blowing fuse or damaging parts even if operation is restarted accidentally.
5.
This room air conditioner should not be used at the cooling operation when the outside temperature is below
10°C (50°F).
6.
This room air conditioner (the reverse cycle) should not be used when the outside temperature is below
-10°C (14°F).
If the reverse cycle is used under this condition, the outside heat exchanger is frosted and efficiency falls.
7.
When the outside heat exchanger is frosted, the frost is melted by operating the hot gas system, it is not
trouble that at this time fan stops and the vapour may rise from the outside heat exchanger.
– 4 –
SAFETY PRECAUTION
●
●
●
Please read the “Safety Precaution” carefully before operating the unit to ensure correct usage of the unit.
Pay special attention to signs of “
Warning” and “
Caution”. The “Warning” section contains matters which,
if not observed strictly, may cause death or serious injury. The “Caution” section contains matters which may
result in serious consequences if not observed properly. Please observe all instructions strictly to ensure safety.
The sign indicate the following meanings.
The sign in the figure indicates prohibition.
Make sure to connect earth line.
Indicates the instructions that must be followed.
●
Please keep this manual after reading.
PRECAUTIONS DURING INSTALLATION
●
Do not reconstruct the unit.
Water leakage, fault, short circuit or fire may occur if you reconstruct
the unit by yourself.
●
Please ask your sales agent or qualified technician for the installation
of your unit. Water leakage, short circuit or fire may occur if you install
the unit by yourself.
●
Please use earth line.
Do not place the earth line near water or gas pipes, lightning-conductor,
or the earth line of telephone. Improper installation of earth line may
cause electric shock.
●
A circuit breaker should be installed depending on the mounting site of
the unit. Without a circuit breaker, the danger of electric shock exists.
●
Do not install near location where there is flammable gas. The outdoor
unit may catch fire if flammable gas leaks around it.
●
Please ensure smooth flow of water when installing the drain hose.
WARNING
CAUTION
PRECAUTIONS DURING SHIFTING OR MAINTENANCE
W
A
R
N
I
N
G
●
Should abnormal situation arises (like burning smell), please stop operating the unit
and turn off the circuit breaker. Contact your agent. Fault, short circuit or fire may
occur if you continue to operate the unit under abnormal situation.
●
Please contact your agent for maintenance. Improper self maintenance may cause
electric shock and fire.
●
Please contact your agent if you need to remove and reinstall the unit. Electric
shock or fire may occur if you remove and reinstall the unit yourself improperly.
PRECAUTIONS DURING OPERATION
●
W
A
R
N
I
N
G
Avoid an extended period of direct air flow for your health.
●
●
Do not put objects like thin rods into the panel of blower and suction side
because the high-speed fan inside may cause danger.
Do not use any conductor as fuse wire, this could cause fatal accident.
●
During thunder storm, disconnect and turn off the circuit breaker.
– 5 –
PRECAUTIONS DURING OPERATION
●
The product shall be operated under the manufacturer specification and
not for any other intended use.
●
●
When operating the unit with burning equipments, regularly ventilate the
room to avoid oxygen insufficiency.
●
●
●
Please switch off the unit and turn off the circuit breaker during cleaning, the
high-speed fan inside the unit may cause danger.
Turn off the circuit breaker if the unit is not to be operated for a long period.
●
●
Do not splash or direct water to the body of the unit when cleaning it as this
may cause short circuit.
Do not place plants directly under the air flow as it is bad for the plants.
●
●
Do not direct the cool air coming out from the air-conditioner panel to face
household heating apparatus as this may affect the working of apparatus
such as the electric kettle, oven etc.
Please ensure that outdoor mounting frame is always stable, firm and
without defect. If not, the outdoor unit may collapse and cause danger.
●
C
A
U
T
I
O
N
Do not attempt to operate the unit with wet hands, this could cause fatal
accident.
Do not climb on the outdoor unit or put objects on it.
Do not put water container (like vase) on the indoor unit to avoid water
dripping into the unit. Dripping water will damage the insulator inside the unit
and causes short-circuit.
When operating the unit with the door and windows opened, (the room humidity is always above
80%) and with the air deflector facing down or moving automatically for a long period of time,
water will condense on the air deflector and drips down occasionally. This will wet your furniture.
Therefore, do not operate under such condition for a long time.
● If the amount of heat in the room is above the cooling or heating capability of the unit (for
example: more people entering the room, using heating equipments and etc.), the preset room
temperature cannot be achieved.
●
– 6 –
SPECIFICATIONS
RAS-20CNHZ2/
RAS-30CNHZ2
RAM-50CNHZ2
20 W
40 W
FAN MOTOR CAPACITOR
NO
NO
FAN MOTOR PROTECTOR
NO
NO
COMPRESSOR
—
GW20DN8A
COMPRESSOR MOTOR CAPACITOR
NO
NO
OVERLOAD PROTECTOR
NO
YES
OVERHEAT PROTECTOR
NO
YES
FUSE (MICRO COMPUTER CIRCUIT)
NO
3.0A
FUSE (MAIN SUPPLY)
NO
25A
FUSE (FAN MOTOR)
NO
2A
POWER RELAY
NO
G4A
POWER SWITCH
NO
NO
TEMPORARY SWITCH
YES
NO
SERVICE SWITCH
NO
YES
TRANSFORMER
NO
NO
VARISTOR
NO
450NR
NOISE SUPPRESSOR
NO
20132A
YES(IC)
YES(IC)
REMOTE CONTROL SWITCH (LIQUID CRYSTAL)
YES
NO
FUSE CAPACITY
16 A TIME DELAY FUSE
MODEL
FAN MOTOR
THERMOSTAT
----------
UNIT
REFRIGERANT CHARGING
VOLUME
(Refrigerant 22)
PIPES (MAX. 35m)
– 7 –
❈ 1350g
WITHOUT REFRIGERANT BECAUSE
COUPLING IS FLARE TYPE.
SPECIFICATIONS FOR INDOOR UNITS COMBINATIONS
WALL TYPE DC INVERTER QUADRUPLE SYSTEM MULTI
COOLING AND HEATING
TYPE
RAS-20CNHZ2
INDOOR UNIT
MODEL
RAS-30CNHZ2
RAM-50CNHZ2
OUTDOOR UNIT
PHASE/VOLTAGE/FREQUENCY
1ø, 220V-230V, 50Hz
CIRCUIT AMPERES TO CONNECT (A)
16
COOLING
(ONE UNIT)
CAPACITY (kW)
2.50 (1.00~3.00)
3.20 (1.00~3.30)
(B.T.U./h)
8530 (3412~10236)
10919 (3412~11260)
TOTAL INPUT (W)
1000 (300~1080)
1100 (300~1160)
EER (B.T.U./hW)
8.53
9.93
TOTAL AMPERES (A)
4.50
5.00
POWER FACTOR (%)
97
96
SOUND LEVEL (INDOOR)
33
35
AIR FLOW VOLUME (Hi)
5.7m3/min
8.5m3/min
5.40 (1.00~5.60)
CAPACITY (kW)
(B.T.U./h)
18426 (3412~19108)
COOLING
TOTAL INPUT (W)
2150 (450~2200)
(TWO
UNITS)
EER (B.T.U./hW)
8.57
TOTAL AMPERES (A)
9.40
POWER FACTOR (%)
99
SOUND LEVEL (OUTDOOR)
HEATING
(ONE UNIT)
50
CAPACITY (kW)
3.60 (0.90~4.00)
4.50 (0.90~4.60)
(B.T.U./h)
12284 (3071~13649)
15355 (3071~15696)
TOTAL INPUT (W)
1470 (120~1690)
1900 (120~1920)
EER (B.T.U./hW)
8.36
8.08
TOTAL AMPERES (A)
6.50
8.30
POWER FACTOR (%)
98
99
SOUND LEVEL (INDOOR)
33
37
AIR FLOW VOLUME (Hi)
7.7m3/min
9.5m3/min
6.40 (1.50~7.00)
CAPACITY (kW)
(B.T.U./h)
21838 (5118~23885)
HEATING
TOTAL INPUT (W)
2100 (450~2300)
(TWO
UNITS)
EER (B.T.U./hW)
9.66
TOTAL AMPERES (A)
9.20
POWER FACTOR (%)
99
SOUND LEVEL (OUTDOOR)
52
AIR DEFLECTORS
YES (AUTO SWING)
YES (AUTO SWING)
3
3
FAN SPEED
NOT PROVIDED (POWER CORD SHOULD BE PREPARED AND
CONNECTED TO OUTDOOR UNIT WHEN INSTALLED)
LINE CORD
REMOTE CONTROL SWITCH
YES (WIRELESS)
YES (WIRELESS)
MAXIMUM LENGTH OF PIPING
MAX. 35m (TWO UNITS TOTAL)
STANDARD
CE (EMC&LVD)
RAS-20CNHZ2
RAS-30CNHZ2
RAM-50CNHZ2
W
792
850
1008
H
302
340
698
D
255
270
394
cu.ft.
2.15
2.76
9.79
GROSSWEIGHT (kg)
9.5
10
48
FLARENUTSIZE (SMALL/LARGE)
—
—
6.35D/9.52D, 6.35D/9.52D
MODEL
PACKING
(mm)
– 8 –
INSTALLATION
HEIGHT DIFFERENCE
Height difference between indoor units should not be more than 5m.
Indoor unit 1
Indoor unit 2
Maximum 5 m
Outdoor unit
(Within ±10 m)
PIPING LENGTH
Indoor unit 2
L2
Outdoor unit
(L1 + L2) = Maximum 35m
Maximum piping length for one indoor unit is 25m.
2.5+2.5
2.5+3.2
TWO
UNITS
3.2+3.2
Indoor unit 1
Additional R-22
0g
0g
~20m add 0g
~25m add 25g
~30m add 50g
~35m add 75g
– 9 –
L1
MULTI-AIR CONDITIONER
With this multi-air conditioner, 2 indoor units can be connected to one outdoor unit to be driven. You can operate the
required number of indoor units.
Combination of Operations:
● You cannot operate the indoor units in the
following combination.
● The indoor unit which is switched on first continues to operate,
but other indoor units which is switched on later does not
operate while the lamp lights.
One unit
Other unit
Heating
Cooling
Heating
Dehumidifying
Heating
Circulating (fan)
● To re-start an indoor unit which was operated later, stop the
indoor unit which was operated first or later and reset the type
of operation, then perform operation again.
Adjusting the Number of Indoor Units:
The more the indoor units to be operated, the lower the power of each unit. Refer to the
specification on installation manual. Decrease the number of indoor units to be operated
especially when it is very hot or cold or when you want to reach the present temperature
quickly.
Stopped Indoor Units:
When an indoor unit is operated in the cooling, heating or dehumidifying mode in the room, the sound of refrigerant flow
may be heard from a stopped indoor unit or a stopped indoor unit may become warm. This is because the indoor unit
returns refrigerant to the outdoor unit to be ready for operation.
Outdoor Units:
● Even after operation is stopped, the fan of the outdoor unit continues to rotate for 10-60 seconds to cool the internal
electrical parts.
● During heating, condensed water flows out from the outdoor unit and the defrosting water flows out during defrosting.
Do not block the drain outlet of the outdoor unit in a cold place; otherwise the condensed or defrosting water could
freeze.
NAMES AND FUNCTIONS OF EACH PART
OUTDOOR UNIT
DRAIN PIPE
Condensed water drain to outside.
CONNECTING CORD
AIR INLET (BACK, LEFT SIDE)
AIR OUTLET
MODEL NAME AND DIMENSIONS
MODEL
WIDTH (mm)
HEIGHT (mm)
DEPTH (mm)
RAS-20CNHZ2
744
248
168
RAS-30CNHZ2
798
265
168
RAM-50CNHZ2
850
650
298
– 10 –
NAMES AND FUNCTIONS OF EACH PART
INDOOR UNIT
RAS-20CNHZ2
AIR FILTER
To prevent dust from coming into the indoor unit.
(Refer page 30)
INDOOR UNIT INDICATORS
Light indicator showing the operating condition.
(Refer page 12)
FRONT PANEL (AIR INLET)
HORIZONTAL DEFLECTOR ● VERTICAL
DEFLECTOR (AIR OUTLET)
(Refer page 24)
REMOTE CONTROLLER
Send out operation signal to the indoor unit. So as to
operate the whole unit.
(Refer page 14)
RAS-30CNHZ2
AIR FILTER
To prevent dust from coming into the indoor unit.
(Refer page 31)
INDOOR UNIT INDICATORS
Light indicator showing the operating condition.
(Refer page 13)
FRONT PANEL (AIR INLET)
HORIZONTAL DEFLECTOR ● VERTICAL
DEFLECTOR (AIR OUTLET)
(Refer page 24)
REMOTE CONTROLLER
Send out operation signal to the indoor unit. So as to
operate the whole unit.
(Refer page 14)
– 11 –
OPERATION INDICATOR
RAS-20CNHZ2
NORMAL
TEMPORARY
/AUTO
TEMPORARY SWITCH
Use this switch to start and stop when the remote controller does not work.
● By setting the temporary switch, the operation is done in previously set
operation mode.
● When the operation is done using the temporary switch after the power
source is turned off and turn on again, the operation is done in automatic
mode.
AUTO RESTART SWITCH
●
●
In the event of power failure, the air conditioner will restart automatically
in the previously selected mode once the power is restored.
In the event of power failure during TIMER operation, the timer will be
reset and the unit will begin or stop operating under a new timer setting.
NORMAL
Use this switch in order to prevent the unit from switch ON after the power
supply resuming from the power failure.
SELECTOR SWITCH IS PRESET AT NORMAL POSITION.
Indoor unit 2
! CAUTION
1. Turn on the circuit breaker first before switching the auto restart switch to
AUTO. Failure to do so may result the unit to run at previous preset mode or
cannot operate.
2. Operation of indoor units are as mentioned on page 10 “Combination of
Operations. (Priority of operation is for unit no. 2)
Indoor unit 1
Outdoor unit
INDOOR UNIT INDICATORS
OPERATION LAMP
This lamp lights during operation.
The OPERATION LAMP flashes in the following cases
during heating.
(1) During preheating
For about 2–3 minutes after starting up.
(2) During defrosting
Defrosting will be performed about 50 minutes when
frost forms on the heat exchanger of the outdoor
unit, for 5–10 minutes each time.
TIMER LAMP
This lamp lights when the timer is working.
SIGNAL RECEIVER
There will be a beep sound when this receiver receives
signal from remote controller.
– 12 –
OPERATION INDICATOR
RAS-30CNHZ2
TEMPORARY SWITCH
Use this switch to start and stop when the remote controller does not work.
SELECTOR SWITCH
AUTO RESTART SWITCH
●
AUTO
NORMAL RESTART
TEMPORARY
SWITCH
●
In the event of power failure, the air conditioner will restart automatically in
the previously selected mode once the power is restored.
In the event of power failure during TIMER operation, the timer will be reset
and the unit will begin or stop operating under a new timer setting.
NORMAL
Use this switch in order to prevent the unit from switch ON after the power
supply resuming from the power failure.
SELECTOR SWITCH IS PRESET AT NORMAL POSITION.
Indoor unit 2
! CAUTION
1. Turn on the circuit breaker first before switching the auto restart switch to
AUTO. Failure to do so may result the unit to run at previous preset mode or
cannot operate.
2. Operation of indoor units are as mentioned on page 10 “Combination of
Operations. (Priority of operation is for unit no. 2)
Indoor unit 1
Outdoor unit
INDOOR UNIT INDICATORS
OPERATION LAMP
This lamp lights during operation.
The OPERATION LAMP flashes in the following cases
during heating.
(1) During preheating
For about 2–3 minutes after starting up.
(2) During defrosting
Defrosting will be performed about 50 minutes when
frost forms on the heat exchanger of the outdoor unit,
for 5–10 minutes each time.
FILTER LAMP
When the device is operated for a total of about 100 hours,
the FILTER lamp lights to indicate that it is time to clean
the filter. The lamp goes out when the POWER SWITCH
set to OFF and ON again.
SIGNAL RECEIVER
There will be a beep sound when this receiver receives
signal from remote controller.
TIMER LAMP
This lamp lights when the timer is working.
– 13 –
NAMES AND FUNCTIONS OF REMOTE CONTROL UNIT
REMOTE CONTROLLER
This controls the operation of the indoor unit. The range of control is about 7 meters. If indoor lighting
is controlled electronically, the range of control may be shorter.
This unit can be fixed on a wall using the fixture provided. Before fixing it, make sure the indoor unit can
be controlled from the remote controller.
● Signal emitting window/transmission sign
˚CH
●
●
●
●
●
●
●
˚CH
●
RESET
●
●
●
●
●
AUTO
●
Point this window toward the indoor unit when controlling it.
The transmission sign blinks when a signal is sent.
Display
This indicates the room temperature selected, current time, timer status,
function and intensity of circulation selected.
START/STOP button
Press this button to start operation. Press it again to stop operation.
SLEEP button
Use this button to set the sleep timer.
TEMPERATURE buttons
Use these buttons to raise or lower the temperature setting. (Keep pressed,
and the value will change more quickly.)
TIME button
Use this button to set and check the time and date.
RESET buttons
FUNCTION selector
Use this button to select the operating mode. Every time you press it,
the mode will change from (AUTO) to (HEAT) to (DEHUMIDIFY) to
(COOL) and to
(FAN) cyclically.
FAN SPEED selector
This determines the fan speed. Every time you press this button, the intensity
of circulation will change from (AUTO) to (HI) to (MED) to (LOW)
(during the
(FAN) mode, from
HI to
MED to
LOW).
AUTO SWING button
Controls the angle of the horizontal air deflector.
TIMER control
Use this button to set the timer.
OFF-TIMER button Select the turn OFF time.
ON-TIMER button Select the turn ON time.
RESERVE button Time setting reservation.
CANCEL button Cancel time reservation.
HEAT
DEHUMIDIFY
COOL
FAN
FAN SPEED
LOW
MED
HI
SLEEPING
STOP (CANCEL)
START (RESERVE)
START/STOP
TIME
TIMER SET
TIMER SELECTOR
ON TIMER
OFF TIMER
AUTO SWING
Precautions for Use
● Do not put the remote controller in the following places.
● In direct sunlight.
● In the vicinity of a heater.
● Handle the remote controller carefully. Do not drop it on the floor,
and protect it from water.
● Once the outdoor unit stops, it will not restart for about 3 minutes
(unless you turn the power switch off and on or unplug the power
cord and plug it in again).
This is to protect the device and does not indicate a failure.
● If you press the FUNCTION selector button during operation, the
device may stop for about 3 minutes for protection.
– 14 –
AUTOMATIC OPERATION
The device will automatically determine the mode of operation, HEAT, COOL or DEHUMIDIFY depending on
the initial room temperature. The selected mode of operation will not change when the room temperature
varies.
Press the FUNCTION selector so that the display indicates the
mode of operation.
1
●
START
STOP
RESET
(AUTO)
When AUTO has been selected, the device will automatically determine
the mode of operation, HEAT, COOL or DEHUMIDIFY depending on
the initial room temperature.
Press the
(START/STOP) button.
Operation starts with a beep.
Press the button again to stop operation.
■ As the settings are stored in memory in the remote controller, you only have
to press the
(START/STOP) button next time.
You can raise or lower the temperature setting as necessary by maximum of
3°C.
Press the temperature button and the temperature setting
will change by 1°C each time.
°C
●
●
The preset temperature and the actual room temperature may vary
somewhat depending on conditions.
The display does not indicate the preset temperature in the AUTO mode.
If you change the setting, the indoor unit will produce a beep.
■ Condition of Automatic Operation
Initial room temperature
(approx.)
23~27°C
Under 23°C
- - -
Over 27°C
Function
Temperature setting
FAN SPEED
COOL
27°C
HI at start, MED or LOW
after the preset temperature
is reached
DEHUMIDIFY
Slightly lower than the
room temperature
LOW
HEAT
23°C
HI at start, MED or LOW
after the preset temperature
is reached
– 15 –
HEATING OPERATION
●
Use the device for heating when the outdoor temperature is under 21°C.
When it is too warm (over 21°C), the heating function may not work in order to protect the device.
˚C
1
2
RESET
Press the FUNCTION selector so that the display indicates
(HEAT).
Set the desired FAN SPEED with the (FAN SPEED) button
(the display indicates the setting).
(AUTO): The fan speed is HI at first and varies to MED
automatically when the preset temperature has
been reached.
(HI)
: Economical as the room will become warm
quickly.
But you may feel a chill at the beginning.
(MED) : Quiet.
(LOW) : More quiet.
Set the desired room temperature with the TEMPERATURE
buttons (the display indicates the setting).
3
˚C
The range of 18-22°C is recommended as the
room temperature for heating.
If the temperature setting is 20°C, the room
temperature will be controlled at around 20°C.
The temperature setting and the actual room temperature may
vary somewhat depending on conditions.
(START/STOP) button. Heating operation starts
START Press the
with a beep. Press the button again to stop operation.
STOP
■ As the settings are stored in memory in the remote controller, you only
have to press the
(START/STOP) button next time.
– 16 –
DEHUMIDIFYING OPERATION
Use the device for dehumidifying when the room temperature is over 16°C.
When it is under 15°C, the dehumidifying function will not work.
˚C
START Press the
(START/STOP) button. Dehumidifying operation
starts
with
a
beep.
Press the button again to stop operation.
STOP
1
RESET
Press the FUNCTION selector so that the display indicates
(DEHUMIDIFY).
The FAN SPEED is set at LOW automatically.
The FAN SPEED button does not work.
Set the desired room temperature with the TEMPERATURE
button (the display indicates the setting).
2
The range of 20-26˚C is recommended as the
room temperature for dehumidifying.
■ As the settings are stored in memory in the remote controller, you only
have to press the
(START/STOP) button next time.
■ Dehumidifying Function
When the room temperature is higher than the temperature setting: The device will dehumidify the room,
reducing the room temperature to the preset level.
When the room temperature is lower than the temperature setting: Dehumidifying will be performed at
the temperature setting slightly lower than the current room temperature, regardless of the temperature
setting. The function will stop (the indoor unit will stop emitting air) as soon as the room temperature
becomes lower than the setting temperature.
– 17 –
COOLING OPERATION
Use the device for cooling when the outdoor temperature is 22-42°C.
If humidity is very high (over 80°C) indoors, some dew may form on the air outlet grille of the indoor unit.
˚C
1
Press the FUNCTION selector so that the display indicates
(COOL).
Set the desired FAN SPEED with the
(the display indicates the setting).
RESET
2
(FAN SPEED) button
(AUTO): The FAN SPEED is HI at first and varies to
MED automatically when the preset temperature
has been reached.
(HI)
: Economical as the room will become cool
quickly.
(MED) : Quiet.
(LOW) : More quiet.
˚C
(START/STOP) button. Cooling operation starts
Press the
with
a
beep.
Press the button again to stop operation. The
START
STOP cooling function does not start if the temperature setting is
higher than the current room temperature (even though the
(OPERATION) lamp lights). The cooling function will start as
soon as you set the temperature below the current room
temperature.
3
Set the desired room temperature with the TEMPERATURE
button (the display indicates the setting).
The range of 25-28°C is recommended as the
room temperature for cooling.
If the temperature setting is 27°C, the room
temperature will be controlled at around 27°C.
The temperature setting and the actual room temperature may
vary somewhat depending on conditions.
■ As the settings are stored in memory in the remote controller, you
only have to press the
– 18 –
(START/STOP) button next time.
FAN OPERATION
You can use the device simply as an air circulator. Use this function to dry the interior of the indoor
unit at the end of summer.
1
2
RESET
START
STOP
Press the FUNCTION selector so that the display indicates
(FAN).
Press the
(FAN SPEED) button.*
Press the
(START/STOP) button. Fan operation starts with
a beep. Press the button again to stop operation.
* Note • In the fan operation mode, only display of FAN SPEED
setting will change by pressing FAN SPEED button; the
actual fan speed cannot be changed directly from HI to
LOW mode.
FAN SPEED (AUTO)
..... When the AUTO fan speed mode is set in the cooling/heating operation:
●
For the heating operation
●
●
●
For the cooling operation
●
The fan speed will automatically change according to the temperature
of discharged air.
When the difference of room temperature and setting temperature is
large, fan starts to run at HI speed.
When the room temperature reaches setting temperature, fan speed
changes to LOW automatically.
When the difference of room temperature and setting temperature is
large, fan starts to run at HI speed.
After room temperature reaches the preset temperature, the cooling
operation, which changes the fan speed and room temperature to obtain
optimum conditions for natural healthful cooling will be performed.
– 19 –
HOW TO SET THE TIMER
1 Set the current month and
Time, Day, Month
TIME, DAY,
MONTH
(current time,
day, month)
day with the TIMER control
button.
After you change the
batteries;
M
D
M
D
OFF TIMER
RESET
ON TIMER
1 Press the
OFF-Timer
(OFF-TIMER)
button. The
(OFF) mark blinks
on the display.
RESERVE
CANCEL
AM
STOP
Start
You can set the device to turn off
at the present time.
ON-Timer
Stop
●
Start
The device will turn on
at the designated times.
1
Press the
(ON-TIMER)
button the
(ON) mark blinks
on the display.
AM
1
ON/OFF-Timer
Start
Stop
Press the
(ON-OFF)
button so that the
(OFF)
mark blinks.
● The device will turn on (off) and off
(on) at the designated times.
● The switching occurs first at the
preset time that comes earlier.
● The arrow mark appearing on the
display indicates the sequence of
switching operations.
2 Set the turn-off time
with the TIMER control
button.
Press the
(RESERVE)
button.
3
Press the
(ONTIMER) button so that the
(OFF) mark lights and
the (ON) mark blinks.
PM
PM
PM
AM
How to Cancel Reservation
Point the signal window of the remote controller toward the indoor unit, and press the
(CANCEL)
button.
The (RESERVED) sign goes out with a beep and the (TIMER) lamp turns off on the indoor unit.
NOTE
You can set only one of the OFF-timer,
ON-timer and ON/OFF-timer.
– 20 –
3
2
4 Press the
Set the current time with the
TIMER control button.
Press the
(TIME) button.
(TIME) button again.
The time indication starts lighting
instead of flashing.
● The time indication will disappear
automatically in 10 second.
PM
AM
PM
● To check the current time setting,
PM
press the
The setting of the current time is
now complete.
Example: The current time is 1:30 p.m.
2 Set the turn-off time with the
TIMER control button.
PM
(TIME) button twice.
3 Point the signal window of the remote controller toward the indoor unit, and
press the (RESERVE) button.
The
(OFF) mark starts lighting instead of flashing and the sign
(RESERVED)
lights. A beep occurs and the
(TIMER) lamp lights on the indoor unit.
PM
Example: The device will turn off at 11:00p.m.
The setting of turn-off time is now complete.
2 Set the turn-on time with the
TIMER control button.
3
Point the signal window of the remote controller toward the indoor unit, and
press the (RESERVE) button.
The (ON) mark starts lighting instead of flashing and the
(RESERVED) sign
lights. A beep occurs and the
(TIMER) lamp lights on the indoor unit.
AM
4 Set the turn-on time with the
TIMER control button.
AM
Example:
The device will automatically turn on earlier so that the preset
temperature can be reached at 7:00 a.m.
The setting of the turn-on time is now complete.
5
Point the signal window of the remote controller toward the indoor unit, and
press the (RESERVE) button.
The (ON) mark starts lighting instead of flashing and the
(RESERVED) sign
lights. A beep occurs and the
(TIMER) lamp lights on the indoor unit.
PM
PM
AM
AM
Example:
The device will turn off at 10:30 p.m. and then automatically
turn on earlier so that the preset temperature can be reached
at 7:00 a.m.
The settings of the turn-on/off times are now complete.
●
The timer may be used in three ways: off-timer, on-timer, and ON/OFF (OFF/ON)-timer. Set
the current time at first because it serves as a reference.
●
As the time settings are stored in memory in the remote controller, you only have to press
the
(RESERVE) button in order to use the same settings next time.
– 21 –
HOW TO SET THE SLEEP TIMER
Set the current time at first if it is not set before (see the pages for setting
the current time). Press the
(SLEEP) button, and the display changes
as shown below.
Mode
Indication
41
Sleep timer
H
SLEEP
hour
42
hours 4 3 hours
Sleep timer off 1
47
hours
Sleep Timer: The device will continue working for the designated
number of hours and then turn off.
Point the signal window of the remote controller toward the indoor
unit, and press the SLEEP button.
The timer information will be displayed on the remote controller.
The TIMER lamp lights with a beep from the indoor unit. When the
sleep timer has been set, the display indicates the turn-off time.
Example: If you set 3 hours sleep
time at 11:38 p.m., the turn-off
time is 2:38 a.m.
H
Sleep
timer
Start
The device will be turned off by the sleep
timer and turned on by on-timer.
1 Set the ON-timer.
2 Press the (SLEEP) button and set the sleep timer.
AM
H
AM
For heating:
In this case, the device will turn off
in 2 hours (at 1:38 a.m.) and turn
on early so that the preset
temperature will be almost reached
at 6:00 next morning.
How to Cancel Reservation
Point the signal window of the remote controller toward the indoor unit, and press the
(CANCEL)
button.
The (RESERVED) sign goes out with a beep and the
(TIMER) lamp turns off on the indoor unit.
– 22 –
Explanation of the sleep timer
The device will control the FAN SPEED and room temperature automatically
so as to be quiet and good for people’s health.
You can set the sleep timer to turn off after 1, 2, 3 or 7 hours. The FAN
SPEED and room temperature will be controlled as shown below.
Operation with the sleep timer
Function
Heating
“
”
Operation
The room temperature is kept
at about 12°C minimum.
The room temperature will be
controlled 5°C below the
temperature and the FAN
SPEED will be set to LOW
setting 30 minutes after the
setting of the sleep timer.
5°C
Sleep timer set
30 minutes later
1 hour later
Cooling
“
”
and
dehumidifying
“
The room temperature will be
controlled 2°C above the
temperature and the FAN
SPEED will be set to LOW
setting 30 minutes after the
setting of the sleep timer.
3 hours later
The room temperature is kept
at about 25–28°C.
2°C
Sleep
timer set
”
7 hours
later
2 hours
later
6 hours
later
7 hours later
2 hours
later
30 minutes later
3 hours later
Fan
“
”
The settings of room temperature and circulation are varied.
NOTE
●
●
●
●
●
If date or current time is not set, sleep timer can not be set.
If you set the sleep timer after the off-, on/off- or off/on-timer has been set, the sleep timer
becomes effective instead of the off-, on/off- or off/on-timer set earlier.
You can not set other timer during sleep timer operation.
After sleep timer time is up and when press sleep button again, the sleep timer will be set as
last setting.
Sleep timer effective only once.
– 23 –
ADJUSTING THE AIR DEFLECTOR
1
Adjustment of the conditioned air in the upward and downward
directions.
The horizontal air deflector is automatically set to the proper
angle suitable for each operation. The deflector can be swung
up and down continuously and also set to the desired angle
using the “
(AUTO SWING)” button.
●
If the “
(AUTO SWING)” button is pressed once,
the horizontal air deflector swings up and down. If the
button is pressed again, the deflector stops in its current
position. Several seconds (about 6 seconds) may be
required before the deflector starts to move.
●
Use the horizontal air deflector within the adjusting range
shown on the right.
●
When the operation is stopped, the horizontal air deflector
moves and stops at the position where the air outlet
closes.
RESET
When cooling
dehumidifying
!
●
2
CAUTION
When heating
In “Cooling” operation, do not keep the horizontal air
deflector swinging for a long time. Some dew may form
on the horizontal air deflector and some dew may fall
from it.
Adjustment of the conditioned air to the left and right.
Hold the vertical air deflector as shown in the figure and adjust
the conditioned air to the left and right.
RAS-30CNHZ2
RAS-20CNHZ2
– 24 –
HOW TO EXCHANGE THE BATTERIES IN THE REMOTE CONTROLLER
1
Remove the cover as shown in the figure and take out the
old batteries.
=
2
Install the new batteries.
The direction of the batteries should match the marks in the
case.
!
CAUTION
1. Do not use new and old batteries, or different kinds of batteries
together.
2. Take out the batteries when you do not use the remote controller
for 2 or 3 months.
– 25 –
Push and pull to the
direction of arrow
THE IDEAL WAYS OF OPERATION
Suitable Room Temperature
Install curtain or blinds
! Warning
It is possible to
reduce heat
entering the
room through
windows.
Freezing temperature
is bad for health and a
waste of electric power.
Ventilation
Effective Usage Of Timer
At night, please use the “OFF or ON timer
operation mode”, together with your wake up
time in the morning. This will enable you to
enjoy a comfortable room temperature. Please
use the timer effectively.
! Caution
Do not close the room for a long period of
time. Occasionally open the door and windows
to allow the
entrance of
fresh air.
Do Not Forget To Clean The Air Filter
Dusty air filter will reduce the air volume and
the cooling efficiency. To prevent from wasting
electric energy, please clean the filter every 2
weeks.
Please Adjust Suitable Temperature
For Baby And Children
Please pay attention to the room temperature
and air flow direction when operating the unit
for baby, children and old folks who have
difficulty in movement.
– 26 –
FOR USER’S INFORMATION
The Air Conditioner And The Heat Source In The Room
! Caution
If the amount of heat in the room is above the cooling
capability of the air conditioner (for example: more
people entering the room, using heating equipments
and etc.), the preset room temperature cannot be
achieved.
After Power Failure
When the power is resumed after a power failure,
the indoor unit will still remain “OFF”. To operate the
unit, please press the “ON/OFF” button again.
After power
failure
Operate
Not Operating For A Long Time
When the indoor unit is not to be used for a long
period of time, please switch off the power from the
mains. If the power from mains remains “ON”, the
indoor unit still consumes about 8W in the operation
control circuit even if it is in “OFF” mode.
When Lightning Occurs
! Warning
To protect the whole unit during lightning, please
stop operating the unit and remove the plug from the
socket.
– 27 –
OFF
ATTACHING THE AIR CLEANSING AND DEODORIZING FILTERS
RAS-20CNHZ2
!
CAUTION
Cleaning and maintenance must be carried out only by qualified service personal. Before cleaning,
stop operation and switch off the power supply.
1
Open the front panel.
● Pull up the front panel by holding it at both sides
with both hands.
Front panel
2
Remove the filter.
● Push upward to release the claws and pull out the
filter.
Front cover
Claws
Air filter
Claws (8 places)
3
Attaching the air cleansing and deodorizing filters
to the filter.
● Attach the air cleansing and deodorizing filters to
the frame by gently compress its both sides and
release after insertion into filter frame.
Make sure the “FRONT” is facing back side
CAUTION
Do not bend the air cleansing
and deodorizing filter as it may
cause damage to the structure.
4
Attach the filters.
● Attach the filters by ensuring that the surface written
“FRONT” is facing front.
● After attaching the filters, push the front panel at
three arrow portion as shown in figure and close it.
NOTE
●
●
●
●
In case of removing the air cleansing and deodorizing filters, please follow the above procedures.
The cooling capacity is slightly weakened and the cooling speed becomes slower when the air cleansing
and deodorizing filters are used. So, set the fan speed to "HIGH" when using it in this condition.
Air cleansing and deodorizing filters are washable and reusable up to 20 times by using vacuum
cleaner or water rinse under running tap water. Type number for this air cleansing filter is <SPX-CFH5>.
Please use this number for ordering when you want to renew it.
Do not operate the air conditioner without filter. Dust may enter the air conditioner and fault may occur.
– 28 –
ATTACHING THE AIR CLEANSING AND DEODORIZING FILTERS
RAS-30CNHZ2
! CAUTION
Cleaning and maintenance must be carried out only by qualified service personal. Before cleaning,
stop operation and switch off the power supply.
1
Open the front panel.
● Be sure to hold the button sides on the left and
right of the front panel with both hands and pull
up the front panel forward.
Front panel
2
●
Slightly lift the filter and release the claws (2
locations) at the lower part of the front cover
and remove the filter from the lower side.
Front cover
Claws
3
Claws
Attaching the air cleansing and deodorizing
filters to the filter.
● Attach the air cleansing and deodorizing filters
to the frame by gently compress its both sides
and release after insertion into filter frame.
Frame
Make sure the
“FRONT” is
facing back
side.
CAUTION
Do not bend the air cleansing
and deodorizing filter as it may
cause damage to the structure.
4
Air filter
Air cleansing
and
deodorizing
filter
Filter
Attach the filters.
● Attach the filters by ensuring that the surface
written “FRONT” is facing front.
● After attaching the filters, push the front panel
at three arrow portion as shown in figure and
close it.
NOTE:
●
●
The cooling capacity is slightly weakened and the cooling speed becomes slower when the air
cleaning and deodorizing filter is used. So, set the fan speed to “HIGH” when using it in this
condition.
Air cleansing and deodorizing filters is washable and reusable up to 20 times by using vacuum
cleaner or water rinse. Type number for this air cleaning filter is <SPX-CFH5>. Please use this
number for ordering when you want to renew it.
– 29 –
MAINTENANCE
RAS-20CNHZ2
! CAUTION
Cleaning and maintenance must be carried out only by qualified service personal. Before cleaning,
stop operation and switch off the power supply.
1.
AIR FILTER
Clean the air filter, as it removes dust inside the room. In case the air filter is full of dust, the air flow
will decrease and the cooling capacity will be reduced. Further, noise may occur. Be sure to clean the
filter following the procedure below.
REMOVING METHOD
PROCEDURE
1
Open the front panel and remove the filter
● Gently lift and remove the air cleansing and
deodorizing filter from the air filter frame.
2
Vacuum dust from the air filter and air cleansing
and deodorizing filter using vacuum cleaner. If
there is too much dust, rinse under running tap
water and gently brush it with soft bristle brush.
Allow filters to dry in shade.
Air cleansing and Air filter
deodorizing filter
INSTALLATION METHOD
3
●
●
Re-insert the air cleansing and deodorizing
filter to the filter frame. Set the filter with
“FRONT” mark facing front, and slot them into
the original state.
After attaching the filters, push the front panel
at three arrow portions as shown in figure
and close it.
NOTE:
● Air cleansing and deodorizing filter should be cleaned every month or sooner if noticeable loading
occurs. When used overtime, it may loose its deodorizing function. For maximum performance, it is
recommended to replace it every 3-6 months depending on application requirements.
! CAUTION
●
●
●
Do not wash with hot water at more than 40°C. The filter may shrink.
When washing it, shake off moisture completely and dry it in the shade; do not expose it directly to
the sun. The filter may shrink.
Do not use detergent on the air cleansing and deodorizing filter as some detergent may deteriorate
the filter electrostatic performance.
– 30 –
MAINTENANCE
RAS-30CNHZ2
! CAUTION
Cleaning and maintenance must be carried out only by qualified service personal. Before cleaning,
stop operation and switch off the power supply.
1.
AIR FILTER
Clean the air filter, as it removes dust inside the room. In case the air filter is full of dust, the air flow
will decrease and the cooling capacity will be reduced. Further, noise may occur. Be sure to clean the
filter following the procedure below.
REMOVING METHOD
PROCEDURE
1
2
Open the panel and remove the filter
● Slightly lift the filter and release the claws from
the front cover.
● Gently lift and remove the air cleansing and
deodorizing filter from air filter frame.
Vacuum dust from the air filter and air cleansing
and deodorizing filter using vacuum cleaner. If
there is too much dust, rinse with clean water
and gently brush it with soft bristle brush. Allow
filters to dry in shade.
Front panel
Front cover
Claws
Air filter
INSTALLATION METHOD
3
●
●
Re-insert the air cleansing and deodorizing
filter to the filter frame. Set the filter with
“FRONT” mark facing front, and slot them into
the original state.
After attaching the filters, push the front panel
at three arrow portions as shown in figure
and close it.
NOTE:
● Air cleansing and deodorizing filter should be cleaned every month or sooner if noticeable loading
occurs. When used overtime, it may loose its deodorizing function. For maximum performance, it is
recommended to replace it every 3-6 months depending on application requirements.
! CAUTION
●
●
●
Do not wash with hot water at more than 40°C. The filter may shrink.
When washing it, shake off moisture completely and dry it in the shade; do not expose it directly to
the sun. The filter may shrink.
Do not use detergent on the air cleansing and deodorizing filter as some detergent may deteriorate
the filter electrostatic performance.
– 31 –
2.
Washable Front Panel
●
Remove the front panel and wash with clean
water.
Wash it with a soft sponge.
After using neutral detergent, wash thoroughly
with clean water.
●
When front panel is not removed, wipe it with
a soft dry cloth. Wipe the remote controller
thoroughly with a soft dry cloth.
●
Wipe the water thoroughly.
If water remains at indicators or signal
receiver of indoor unit, it causes trouble.
Method of removing the front panel.
Be sure to hold the front panel with both hands
to detach and attach it.
Removing the Front Panel
Attaching the Front Panel
Arm
Projection
Hole
Flange
When the front panel is fully opened with
both hands, push the right arm to the inside
to release it, and while closing the front panel
slightly, put it out forward.
●
!
●
●
●
Move the projections of the left and right
arms into the Flanges in the unit and
securely insert them into the holes.
CAUTION
Do not splash or direct water to the body of the unit when cleaning
it as this may cause short circuit.
Never use hot water (above 40°C), benzine, gasoline, acid, thinner or
a brush, because they will damage the plastic surface and the coating.
– 32 –
! CAUTION
Cleaning and maintenance must be carried out only by qualified service personal. Before cleaning,
stop operation and switch off the power supply.
3.
MAINTENANCE AT BEGINNING OF LONG OFF PERIOD
●
Run the unit by setting the operation mode to
(COOL), the temperature to 32°C and the fan speed
to HI for about half a day on a fine day, to dry the
unit.
●
Switch off the power plug.
Air
Blow
REGULAR INSPECTION
PLEASE CHECK THE FOLLOWING POINTS BY QUALIFIED SERVICE PERSONAL EVERY
EITHER HALF YEARLY OR YEARLY. CONTACT YOUR SALES AGENT OR SERVICE SHOP.
1
2
Is the earth line disconnected or broken?
Is the mounting frame seriously affected by rust and is the
outdoor unit tilted or unstable?
– 33 –
AFTER SALE SERVICE AND WARRANTY
WHEN ASKING FOR SERVICE, CHECK THE FOLLOWING POINTS.
CONDITION
CHECK THE FOLLOWING POINTS
●
When it does not operate
●
●
●
●
When it does not cool well
When it does not hot well
●
●
●
Is the fuse all right?
Is the voltage extremely high or low?
Is the circuit breaker “ON”?
Was the air filter cleaned?
Does sunlight fall directly on the outdoor unit?
Is the air flow of the outdoor unit obstructed?
Are the doors or windows opened, or is there any source of
heat in the room?
Is the set temperature suitable?
Notes
●
●
In quiet operation or stopping the operation, the following phenomena
may occassionally occur, but they are not abnormal for the operation.
(1) Slight flowing noise of refrigerant in the refrigerating cycle.
(2) Slight rubbing noise from the fan casing which is cooled and then
gradually warmed as operation stops.
The odor will possibly be emitted from the room air conditioner because
the various odor, emitted by smoke, foodstuffs, cosmetics and so on,
sticks to it. So the air filter and the evaporator regularly must be cleaned
to reduce the odor.
●
Please contact your sales agent immediately if the air conditioner still fails to operate normally after the above
inspections. Inform your agent of the model of your unit, production number, date of installation. Please also
inform him regarding the fault.
●
Power supply shall be connected at the rated voltage, otherwise the unit will be broken or could not reach the
specified capacity.
– 34 –
CONSTRUCTION AND DIMENSIONAL DIAGRAM
MODEL RAS-20CNHZ2
120
15
62
Top air suction grill
Air suction grill
1
Mounting
plate
Front cover
744
173
Wireless remote controller
147
VIEWED FROM BACK
(PIPE LEAD-OUT)
Horizontal air
deflector
P
Vertical air deflector
450
45
(147)
60
60
Drain cap connection part
When piping is drawn
horizontally, exchange
the drain hose for the
drain cap.
About 350
42.5
About 280
About 290
Drain Pan
Hole on the wall
for ø65 mm pipe
Line cord
Connecting cable
84
5
Discharge grill
45
23.5
5
59
59
248
6.5
Cabinet
Narrow pipe (ø6.35)
Wide pipe (ø9.52)
MODEL RAS-30CNHZ2
786
120
15
62
Top air suction grill
Wireless remote controller
47
Front cover
798
168
7
10
47
Air suction grill
Mounting
plate
47
Discharge
grill
Horizontal
air deflector
Vertical air
deflector
10
60
60
45
Viewed from P
(bottom direction pipe lead-out)
5
5
60
60
265
5.5
44
47
P
87
Approx.
430
58
58
Drain outlet
Drain hose
Drain Pan
43
Approx.
400
Approx. 340
(174)
450
25
174
Viewed from back
(Pipe lead-out)
Hole on the wall
for ø65 mm pipe
Drain cap
connection part
❋ When piping
is drawn
horizontally,
exchange
the drain
hose for the
drain cap.
Narrow pipe (ø6.35)
94.5
Connecting cable
Wide pipe (ø9.52)
– 35 –
Note:
1. Servicing space of 100mm or more is required on the
left and right sides of the indoor unit and also 50mm or
more space is required above the unit.
2. Insulated pipes should be used for both the narrow and
wide dia. pipes.
MODEL RAM-50CNHZ2
26
64
850
340
298
22
79
20
104
Air outlet
More than
700
10
57
More than
100
More than
100
507
10
12
37
Fixing hole
More than
100
10
320
Holes for anchor bolt
(2-ø12)
201
340
Air suction
grille
169.5
96
638
650
Handle
Handle
198
Service space
Notch for anchor bolt
(2-ø12 Notchs)
– 36 –
MAIN PARTS COMPONENT
THERMOSTAT
Thermostat Specifications
MODEL
RAS-20CNHZ2, RAS-30CNHZ2
THERMOSTAT MODEL
IC
OPERATION MODE
TEMPERATURE
°C (°F)
COOL
HEAT
INDICATION
16
ON
14.3 (57.7)
24.3 (75.7)
OFF
13.6 (56.5)
25.0 (77.0)
INDICATION
24
ON
22.3 (72.1)
32.3 (90.1)
OFF
21.6 (70.9)
33.0 (91.4)
INDICATION
32
ON
30.3 (86.5)
40.3 (104.5)
OFF
29.6 (85.3)
41.0 (105.8)
FAN MOTOR
Fan Motor Specifications
MODEL
RAS-20CNHZ2, RAS-30CNHZ2
RAM-50CNHZ2
DC: 5V, DC: 0 ~ 35V
DC360V
20W
40W
POWER SOURCE
OUTPUT
RED
360V
0V
CONNECTION
YEL
0~35V
5V
M
BLU
15V
0~6V
0~15V
RED
BLK
WHT
YEL
BLU
(Control circuit built in)
BLU : BLUE
YEL : YELLOW
BRN : BROWN
WHT : WHITE
GRY : GRAY
ORN : ORANGE
GRN : GREEN
RED : RED
BLK : BLACK
PNK : PINK
VIO : VIOLET
– 37 –
M
COMPRESSOR MOTOR
Compressor Motor Specifications
MODEL
RAM-50CNHZ2
COMPRESSOR MODEL
GW20DN8A
PHASE
SINGLE
RATED VOLTAGE
AC 220 ~ 230 V
RATED FREQUENCY
50/60 Hz
POWER SOURCE FOR COMPRESSOR
Vcc max = 360V
POLE NUMBER
4
(U)
WHITE
CONNECTION
(V)
20°C
(68°F)
2M = 1.05
75°C
(167°F)
2M = 1.28
RESISTANCE VALUE
( )
YELLOW
(W)
RED
WHITE
RED
YELLOW
CAUTION
When the refrigerating cycle has been operated for a long time with the capillary tubes clogged or crushed
or with too little refrigerant, check the color of the refrigerating machine oil inside the compressor. If the
color has been changed conspicuously, replace the compressor.
– 38 –
WIRING DIAGRAM
INDOOR UNIT
MODEL RAS-20CNHZ2, RAS-30CNHZ2
Connecting
Cord From
Outdoor
Terminal
Board
Brown
C
Red
D
CN10
M
CN4
M
Green &
Yellow
Room
Temperature
Thermistor
MAIN P.W.B.
Black
Black
Gray
Heat
Exchanger
Thermistor
CN1
Gray
Light
Receiving
Unit P.w.b
CN2
X Lines
Wireless
Remote
Control
Indoor Fan
Motor
TEST
CN6
HA
CN7
1 2 3
1 2 3 4
C1C2M1M2
Detail Of X Lines
MODEL NAME
X
RAS-20CNHZ2
7
RAS-30CNHZ2
6
– 39 –
Auto Sweep
Motor
WIRING DIAGRAM
OUTDOOR UNIT
MODEL RAM-50CNHZ2
– 40 –
CIRCUIT DIAGRAM
Remote Control
Key matrix table
Output
D0
D1
D2
D3
Door open
Start/Stop
Operation selection
Fan speed selection
Automatic swing
Door shut
Start/Stop
Super silent cooling
Door open
On timer
Hour up
Input
P10
LCD 1
D3
RB425D(1/2)
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
Door open
Off timer
Door shut
Sleep
D0
K2K3
K7 K8
K15 K16
D1
K8 K10
K17
D2
50v/1u
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
SEG20
SEG21
SEG22
SEG23
SEG24
SEG25
SEG26
SEG27
SEG28
SEG29
SEG30
SEG31
SEG32
SEG33
SEG34
SEG35
IC 1
M3455OM6A-504FP
P30
P31
NCVL C1
VL C2
VL C3
XC IN
XC OUT
VDD
VSS
X OUT
X IN
RESET
CARR
P23
P22
P21
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
D1 D2
EL-1L7
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
K11K12
K18
R6
P12
P11
D3
RB425D
(1/2)
D3
D1
P10
Cancel
Reservation
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 48 47 46 45 44 43 42 41
K13 K14
K5
Super cooling
P12
K6
K4
Room temperature up Room temperature down
Door shut
K1
C8
Hour down
P11
SEG19
SEG18
SEG17
SEG16
SEG15
SEG14
SEG13
SEG12
SEG11
SEG10
SEG9
SEG8
SEG7
SEG6
SEG5
SEG4
SEG3
SEG2
SEG1
SEG0
SEG43
SEG42
SEG41
SEG40
SEG20
SEG19
SEG18
SEG17
SEG16
SEG21
SEG24
SEG25
SEG26
SEG27
SEG28
NC
NC
NC
NC
NC
NC
NC
NC
NC
P40
P41
P42
P43
P00
P01
P02
P03
P10
P11
P12
P13
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
BEEP
P20
1 SEG5
2 SEG0
3 SEG1
4 SEG2
5 SEG3
6 SEG4
7 SEG5
8 SEG6
9 SEG7
10 COM3
11 COM2
12 COM1
13 COM0
14 SEG14
15 SEG13
16 SEG12
17 SEG11
18 SEG13
19 SEG9
20 SEG8
R2
100k
R1
100k
D2
R7
R8
R9
R10
12M
R3
100k
C9
105
R11
150k
R6 R9
24(1/8W)
SW1
SW-187-2P
R5
330
P
R4
100k
Q1
2SC3443
or 2SC2982
K19
C1
334
X1
910kHz
C2 C3
220p 220p
C4
18p
R14
220k
X2
32.768
kHz
R13
220K
C6
104
C7
104
C5
22p
– 41 –
R12
220k
R15
100k
R16
100k
PRINTED WIRING BOARD LOCATION DIAGRAM
MODEL RAS-20CNHZ2
MAIN P.C.B
CN9
(EH-2P)
1
JUMPER
2
G
C103
C107
C105
+
-
YELLOW
3
5V
ZD103
+
-
O
REG2
INDOOR DC
FAN MOTOR
M
BLUE
1
C942
0V
R105
Q902
D901
R109
R919
ICP2
R108
R911
FAN MOTOR
DRIVER
R913
SHUNT
RESISTOR
+
-
C901
R107
R912
R106
5V
R406
5V
R916
(ZR-4P)
Q903
D401
R917
5V
3
D403
R931
1
5V
12V
D903
R932
7
6
5
3
4
0V
2
1
V OUT
J3
2
2
3
3
4
4
5
5
6
6
7
7
R523
TXD
B
A
B
A
23
24
25
26
28
29
31
P75
44
C504
3
3
14
4
2
15
5
1
16
0V
5V
CN7
(XH-4P)
38
R525
0V
37
36
R517
R706
1
C1
2
C2
3
M1
4
M2
R609
HA
R610
0V
0V 0V
NOTES:
1. TYPE
0V
R705
F : FILM
C : CERAMIC
D : ELECTROLYTIC
SW701
C701
+
NORMAL
-
LD702
(TIMER)
LD703
(OPERATION)
J4
R703
2. FORM
R702
H: HAND INSERT
C: SMT
R: RADIAL
A: AXIAL
0V
RESISTOR
CAPACITOR
SYMBOL
RESISTANCE
TOLERANCE
FORM
SYMBOL
RESISTANCE
TOLERANCE
R101
1.0
–5%
1/4W
C
R307
1K
–5%
R102
10K
R103
1.2K
–2%
1/16W
C
R308
12.7K
–2%
1/16W
C
R309
1K
R104
1.0
–5%
1/4W
C
R310
12.7K
R105
1.5
–5%
1/4W
R106
1.5
–5%
1/4W
R107
1.5
–5%
1/4W
C
R108
1.5
–5%
1/4W
C
R401
390
–5%
1/16W
C
R109
1.5
–5%
1/4W
C
R402
390
–5%
1/16W
R403
390
–5%
R404
390
W
POWER
FORM
SYMBOL
1/16W
C
R510
10K
–5%
–1%
1/16W
C
R511
10K
–5%
1/16W
C
R512
10K
–1%
1/16W
C
R513
C
C
W
POWER
FORM
SYMBOL
1/16W
C
R610
1K
–5%
–5%
1/16W
C
R611
10K
–5%
–5%
1/16W
C
10K
–5%
1/16W
C
R701
R514
10K
–5%
1/16W
C
R702
R515
10K
–5%
1/16W
C
R703
R516
10K
–5%
1/16W
C
R704
10K
–5%
R517
10K
–5%
1/16W
C
R705
1K
–5%
C
R518
10K
–5%
1/16W
C
R706
1K
–5%
1/16W
C
R519
10K
–5%
1/16W
C
R709
2K
–5%
1/16W
C
R710
2K
5.1K
–5%
1/10W
C
R405
5.1K
–5%
1/16W
C
R202
2K
–5%
1/16W
C
R406
5.1K
–5%
1/16W
C
R203
2.7K
–5%
1/16W
C
R204
5.1K
–5%
1/16W
C
R206
5.1K
–5%
1/16W
C
R201
R210
1M
R211
R302
R303
0
1K
10K
RESISTANCE
W
FORM
SYMBOL
1/16W
C
R821
1K
–5%
1/16W
C
R822
10K
R823
10K
POWER
RESISTANCE
W
FORM
SYMBOL
220u,50V
D (PF)
H
C601
C102
100u,50V
D (PF)
H
C605
C103
100u,10V
D (UR)
C
SYMBOL
1/16W
C
C101
–1%
1/16W
C
–1%
1/16W
C
POWER
CAPACITANCE
F
CAPACITANCE
F
0.1u,25V
TYPE
FORM
C
C
C
C
C701
47u,10V
D (WX)
C
Q802
2SA1121SC
C
390
–5%
1/10W
C
R825
10K
–1%
1/16W
C
C105
220P,50V
C
C
C702
1000P,50V
C
C
Q803
2SC2618RC
C
200
–5%
1/10W
C
R826
1K
–5%
1/16W
C
C106
0.22u,50V
F
H
C704
0.1u,25V
C
C
1/16W
C
R827
3K
–5%
1/16W
C
C107
0.047u,25V
C
C
C801
150P,50V
C
C
Q821
2SC2462LC
C
1/16W
C
R828
10K
–5%
1/16W
C
C108
0.022u,50V
C
C
C802
0.15u,50V
F
H
Q901
2SJ245S
C
1/16W
C
R829
5.1K
–5%
1/16W
C
C109
56u,50V
D (PF)
H
C803
C
C
Q902
2SC2462LC
C
–5%
1/10W
C
C804
C
C
Q903
2SC3360
C
–5%
1/10W
C
3.3K
–5%
1/10W
C
R911
R523
10K
–5%
1/16W
C
R803
120K
–5%
1/16W
C
R912
5.1K
1K
47
–5%
1/16W
C
C201
100u, 4V
D (WX)
C
C202
0.1u,25V
C
C
DIODE
C
C821
0.01u,55V
F
C
D101
G4DL-6140
H
–5%
1/10W
C
C822
1000p,50V
C
C
D102
D1FS6
C
D401
DAN202K
C
D403
DAP202K
C
DAN202K
C
10K
–5%
1/16W
C
R524
10K
–5%
1/16W
C
R804
120K
–5%
1/16W
C
R913
1K
–5%
1/4W
C
C823
0.047u,16V
F
C
10K
–5%
1/16W
C
R525
10K
–5%
1/16W
C
R805
120K
–5%
1/16W
C
R914
1K
–5%
1/4W
C
C824
0.01u,50V
C
C
R502
10K
–5%
1/16W
C
R806
120K
–5%
1/16W
C
R915
1K
–5%
1/4W
C
C301
0.1u,25V
C
C
R916
–5%
1/16W
C
C302
0.1u,25V
C
C
C303
0.1u,25V
C
C
1/16W
R505
10K
–5%
1/16W
C
R605
R506
10K
–5%
1/16W
C
R507
10K
–5%
1/16W
C
R608
1K
R609
1K
R508
10K
–5%
1/16W
C
R509
10K
–5%
1/16W
C
R807
4.3K
–5%
1/16W
C
1/16W
R808
4.3K
–5%
1/16W
C
R917
–5%
1/16W
C
1/16W
C
R809
10K
–5%
1/16W
C
R919
20K
–1%
1/16W
C
–5%
1/16W
C
R920
2.21K
–1%
1/16W
C
C401
0.1u,25V
C
C
–5%
1/16W
C
R810
360
–5%
1/10W
C
–5%
1/16W
C
R811
1K
–5%
1/16W
C
R930
1K
–1%
1/10W
C
C501
1u,16V
C
C
–5%
1/16W
C
R812
39
–5%
1/4W
C
R931
8.25K
–1%
1/10W
C
C502
0.1u,25V
C
C
R813
39
–5%
1/4W
C
R932
5.1K
–5%
1/16W
C
C503
0.1u,25V
C
C
C504
0.1u,25V
C
C
10K
–5%
R606
10K
R607
10K
3.3K
3.3K
MC34063AM
C
LD702
MC7805CT
H
LD703
IC1
HD6433644H
C
IC401
BR24C02F
C
IC501
ULN2003ANS
C
IR701
RPM6938-V4
H
C901
220u,50V
D (PF)
H
COM801
10u,16V
D (WX)
C
C933
10u,16V
D (WX)
C
C942
0.1u,25V
C
C
C932
NJM2903M-T
SLR-332DC3F
SLR-332YC3F
FORM
SYMBOL
ORANGE
H
CN1
YELLOW
H
CN2
SZN 7P
CN3
ZR 7P
CN4
CN6
COLOR
OSCILLATOR
OSC1
MODEL
C
INDUCTOR
MODEL
JSM2220
FORM
H
MODEL
FORM
BZ1
PKM13EPY
H
FORM
RATED VALUE
L101
82uH, 1.3A
H
L102
560uH, 0.6A
H
L501
W 0.2A
450 (100MHz),
C
L901
450uH, 1,5A
H
MODEL
SYMBOL
ZD101
(TOP ENTRY)
IVORY
TO INDICATING P.C.B.1
(SIDE ENTRY)
IVORY
H
INDICATING P.C.B.1
ZR 5P
(TOP ENTRY)
IVORY
H
AUTO SWEEP MOTOR
ZR 3P
(TOP ENTRY)
IVORY
H
TEST PIN
CN7
XH 4P
(TOP ENTRY)
BLACK
H
HA TERMINAL
CN8
ZR 4P
(TOP ENTRY)
IVORY
H
EEPROM
H
THERM FUSE
XH 3P
(5P, TOP ENTRY)
WHITE
H
FAN MOTOR
CN10
JUMPER
MODEL
PTZ5.1
FORM
0W
, 1/10W
C
FORM
C
IC PROTECTOR
MODEL
RATING
FORM
D901
LFB01
C
ZD102
PTZ20A
C
SYMBOL
D902
D1FL20U
C
ZD103
RLZ6.8A
C
ICP1
ICP-S0.5
0.5A
C
LFB01
C
ICP2
CCP2E-50
2.0A
C
D903
ROOM,HEX. THERMISTOR
C
JW1
ZD201
RLZ27D
C
ZD701
RD5.1UJN2
C
REMARK
H
CHIP JUMPER
SYMBOL
FORM
H
BUZZER
SYMBOL
COLOR
WHITE
(TOP ENTRY)
CN9
SYMBOL
SWITCH
MODEL NO.
PH 4P
FORM
EF0S1005E5, 10MHz
C
ZENER DIODE
D821
CONNECTORS
MODEL NO.
SYMBOL
SW701
MODEL NO.
1/4W
C
SYMBOL
MODEL NO.
FORM
SYMBOL
–5%
R501
–5%
FORM
SYMBOL
SYMBOL
R500
1K
C
C
R801
R604
2SC4398
C
C
C
Q801
0.1u,25V
C
C
REG2
C104
1/16W
1/16W
REG1
C
C
1/16W
–5%
C
2SA1121SC
1/16W
–5%
–5%
2SC2462LC
Q202
–1%
–5%
10K
Q201
8.25K
10K
10K
FORM
R824
10K
R504
MODEL NO.
C
R521
R503
SYMBOL
1/10W
R830
LED
IC
TRANSISTOR
TYPE
FORM
TOLERANCE
–5%
47
R522
C
–5%
TOLERANCE
C
C
C
W
1/16W
1/16W
C
RESISTANCE
–5%
1/16W
1/16W
POWER
10K
–5%
1/16W
TOLERANCE
R520
–5%
–5%
STEPPING
MOTOR
R518
C704
32
M
DRIVER
R519
43
P74
34
P73
Vcc 33
P57
DRAIN PUMP
2 WAY VAVLE
EXHAUST/
HUMIDIFIER
P55
30
P56
NC
P54
P53
P52
27
13
R520
35
AMAND
X1
2
4
R516
22
R515
21
R514
20
R513
19
B
R512
18
A
B
A
R511
R206
17
R508
IRQ0
AUTO SWEEP MOTOR 3
P51
NICE TEMP.
P94 DISABLE
1
12
8
R521
45
11
5
P81 40
P80 39
P77
STATIC-PRESSURE SELECT
46
6
(ZR-5P)
P83 42
P82 41
TMOV
HA INPUT
0V
R522
CN4
10
C605
B
A
B
A
AUTO SWEEP MOTOR 1
BUZZER OUTPUT
INSTALLATION OF DUCT SYS (UP/DOWN)
47
12V
7
R611
AUTO SWEEP MOTOR 2
P84
48
C601
SDO
ABNORMAL WATER LEVEL DETECTION
(Lo:ABNORMAL/Hi:NORMAL)
P85
CURRENT SELECTION (20A/15A)
P50
P93
P20
P86
FILTER RESET
TEST INDICATOR
RXD
P87
(AX-7M12)
RESET
R510
14
C824
SDI
DRAIN PUMP
TEST PIN
R704
P32
P31
49
SDA
EXTERNAL
ROM
DC-FM OVER CURRENT DETECTION
FAN PWM OUTPUT
RPM OF PWM FAN
WIRELESS INPUT
WIRELESS ID SELECT
50
P30
51
P10
PWM
52
SCL
IRQ1
P16
53
BZ
C501
R401
R402
R524
C702
C932
IRQ3
AN6
AN5
AN4
AN3
AN7
AVcc
ABNORMAL FAN CURRENT SENSOR
PWM FEEDBACK
HUMIDITY
AN2
54
R509
P92
R204
-
Q201
55
FLASH ROM WRITE IN CONTROL
R504
0V
P91
13
16
C201
R202
+
0V
P90
12
15
Q202
RESET
C801
R806
R503
RES
11
R507
A
Q801
R203
R803
5
6
ZD201
+
-
R201
R811
5V
7
COM801
(2/2)
R804
R808
R810
R805
R501
R502
1
1
J2
AUTO RESTART/
TEMPORARY
Q803
C804
C803
12V
ZD701
3
1
(SZN-7P)
R709
IR701
LIGHT
RECEIVING
UNIT
2
GND
(ZR-7P)
R710
R701
R812
Q802
JW1
V DD
CN2
R807
R809
R813
C802
CN3
5V
56
IC1
R506
R500
35V
57
9 OSC2
10
0V
58
59
B
A
8 OSC1
R505
R210
R211
C202
0V
0V
7 Vss
OSC1
Q821
RESISTANCE : 10K (25 C) W
B-CONSTANT : 3950K (B25/50)
5V
60
0V
FILTER/
POWERFULL
P60
COMP
P61 OPERATION
HOTKEEP
P62
OPERATION
P63
TIMER
P64
DRY
P65
POWERFUL
P66
HA OUTPUT
P67
R829
R827
1
+
24 COM801
(1/2)
61
0V
+
-
6 X1
B
R830
R828
8
D821
C823
R825
C822
R823
R821
C821
3
R826
R822
R824
4
HEAT EXCHANGER
THERMISTOR
5 X2
C502
IF CIRCUIT
3
GRAY
62
TEST/FAST FEED
R608
4 TEST
2
GRAY
HEAT
EXCHANGER
R607
AN 1 SWEEP
2 AN 0 PANEL
SELECT
3 AV S S
R605
5V
5V
R606
1
BLACK
ROOM
TEMP.
1
R604
C303
C302
C301
R303
R308
R310
REMOCON ID
(A/B)
63
TEST INDICATOR MODE
64
R309
(PH-4P)
BLACK
+
0V
R307
5V
CN1
C933
R302
2
1
INDICATING P.C.B 1
BZ1
9
3
J1
12V
IC501
CN6
(ZR-3P)
INDICATING P.C.B 2
0V
EXTENDED
MEMORY
IC401
C401
C503
L501
8
0V
RESISTANCE : 10K (25 C) W
B-CONSTANT : 3950K (B25/50)
EEPROM
2
5V
R930
ROOM TEMPERATURE
THERMISTOR
4
R403
R404
TEST
CN8
R405
R915
R920
R914
5V
R801
TERMINAL
BOARD
L901
Q901
D902
D
CONNECTING
CABLE
R102
5
4
I
ZD102
C108
3
L102
2
C104
6
RED
RED
5
8 1
REG1
R103
C109
C101
C106
D101
C
+
-
(XH-3P)
12V
R104
7
+
-
C102
L101
BROWN
POWER SUPPLY
ICP1
ZD101
CN10
5V
R101
35V
D102
THERMAL FUSE
FOR TERMINAL
(102 C)
– 43 –
MODEL RAS-30CNHZ2
MAIN P.C.B
CN9
(EH-2P)
1
JUMPER
2
C103
C107
G
+
-
YELLOW
3
5V
ZD103
ZD102
C105
O
REG2
INDOOR DC
FAN MOTOR
M
BLUE
1
C942
0V
R105
Q902
D901
R109
R911
FAN MOTOR
DRIVER
R913
SHUNT
RESISTOR
R919
ICP2
R108
+
-
C901
R107
R912
R106
5V
R406
5V
R916
(ZR-4P)
Q903
D401
R917
5V
3
D403
R931
12V
C401
L501
6
5
0V
2
1
3
IC501
4
9
R523
TXD
20
21
22
23
24
25
B
A
27
28
29
B
A
31
3
3
14
4
15
5
P75
R520
44
0V
R519
43
R518
5V
38
P57
SW1
R525
0V
37
36
R517
R602
M1
4
M2
HA
R610
0V
0V 0V
SW2
NOTES:
1. TYPE
0V
Q501
1
2
2
F : FILM
C : CERAMIC
D : ELECTROLYTIC
Q502
R705
3
3
5
5
6
6
2. FORM
0V
R704
4
4
R713
1
R712
R706
H: HAND INSERT
C: SMT
R: RADIAL
A: AXIAL
Q503
R703
0V
R702
LD704
(FILTER)
LD703
(OPERATION)
C2
3
-
0V
LD702
(TIMER)
D702
C1
2
R609
AUTO RESTART
SWITCH
D701
R711
LIGHT
RECEIVING
UNIT
(XH-4P)
1
R707
C701
+
0V
CN7
TEMPORARY
SWITCH
(PH-6P)
5V
STEPPING
MOTOR
R521
45
35
P74
34
P73
Vcc 33
32
M
16
0V
R522
46
C704
2 WAY VAVLE
EXHAUST/
HUMIDIFIER
P56
P55
30
2
13
R611
AUTO SWEEP MOTOR 2
A
B
A
AUTO SWEEP MOTOR 1
26
12
4
8
C601
SDO
ABNORMAL WATER LEVEL DETECTION
(Lo:ABNORMAL/Hi:NORMAL)
B
19
5
(ZR-5P)
P81 40
P80 39
P77
AMAND
X1
1
R516
18
R515
17
Q702
B
R514
IRQ0
A
B
A
11
1
47
CN4
10
6
P83 42
P82 41
TMOV
STATIC-PRESSURE SELECT
AUTO SWEEP MOTOR 3
DRAIN PUMP
16
P84
48
R601
P32
P31
SDA
P30
EXTERNAL
ROM
SCL
P10
PWM
FAN PWM OUTPUT
DC-FM OVER CURRENT DETECTION
RPM OF PWM FAN
WIRELESS ID SELECT
WIRELESS INPUT
TEST INDICATOR
NICE TEMP.
P94 DISABLE
P54
P93
P85
HA INPUT
INSTALLATION OF DUCT SYS (UP/DOWN)
R513
14
P86
FILTER RESET
NC
P92
P20
P87
BUZZER OUTPUT
P52
13
RXD
12V
7
2
C824
SDI
DRAIN PUMP
TEST PIN
0V
C501
R401
R402
R524
C702
P16
IRQ1
AN6
AN7
AVcc
AN4
AN3
AN5
PWM FEEDBACK
HUMIDITY
49
CURRENT SELECTION (20A/15A)
Q701
0V
50
FLASH ROM WRITE IN CONTROL
P53
5V
0V
51
R512
0V
P91
15
R710
CN2
P90
12
R511
R503
11
P51
-
A
52
(AX-7M12)
RESET
P50
Q801
RES
R708
R806
5
6
9 OSC2
R709
+
-
R206
R805
7
COM801
(2/2)
C201
R803
R201
R811
C804
C803
Q802
R202
R808
R810
Q201
R502
R804
Q803
+
R501
C801
R812
R807
R809
R813
C802
R500
RESET
53
IC1
R510
0V
54
8 OSC1
10
R204
0V
55
R509
ZD201
5V
R211
C202
Q202
56
R508
R210
C823
RESISTANCE : 10K (25 C) W
B-CONSTANT : 3950K (B25/50)
57
B
A
7 Vss
OSC1
5V
58
59
R507
35V
R506
R830
Q821
R505
R827
0V
FILTER/
POWERFULL
P60
COMP
P61 OPERATION
HOTKEEP
P62
OPERATION
P63
TIMER
P64
DRY
P65
POWERFUL
P66
HA OUTPUT
P67
R829
8
1
+
24 COM801
(1/2)
B
R203
3
D821
60
6 X1
R828
C822
R823
R821
C821
R826
R822
R824
4
HEAT EXCHANGER
THERMISTOR
R825
GRAY
5 X2
C502
IF CIRCUIT
3
61
0V
ABNORMAL FAN CURRENT SENSOR
2
GRAY
AN2
4 TEST
62
TEST/FAST FEED
AN 1 SWEEP
2 AN 0 PANEL
SELECT
3 AV S S
R605
BLACK
5V
5V
R608
1
R606
BLACK
ROOM
TEMP.
1
HEAT
EXCHANGER
R607
REMOCON ID
(A/B)
R604
C303
C302
C301
R303
R308
R310
5V
(PH-4P)
63
TEST INDICATOR MODE
64
R309
0V
+
0V
R307
1
+
-
C932
R302
2
IRQ3
C933
3
BZ
BZ1
DRIVER
(ZR-3P)
INDICATING P.C.B (H-BOARD)
12V
EXTENDED
MEMORY
C605
C503
7
IC401
R801
D903
8
CN6
CN1
1
5V
R932
0V
RESISTANCE : 10K (25 C) W
B-CONSTANT : 3950K (B25/50)
EEPROM
2
5V
R930
ROOM TEMPERATURE
THERMISTOR
4
R403
R404
TEST
CN8
R405
R915
R920
R914
5V
C504
TERMINAL
BOARD
L901
Q901
D902
D
CONNECTING
CABLE
+
-
I
C104
5
4
R102
L102
2
R103
C109
3
RED
RED
5
8 1
REG1
6
C108
C101
C106
D101
C
+
-
(XH-3P)
12V
R104
7
+
-
C102
ZD101
L101
BROWN
POWER SUPPLY
ICP1
CN10
5V
R101
35V
D102
THERMAL FUSE
FOR TERMINAL
(102 C)
0V
0V
RESISTOR
SYMBOL
CAPACITOR
RESISTANCE
W
TOLERANCE
POWER
FORM
SYMBOL
RESISTANCE
W
TOLERANCE
POWER
SYMBOL
RESISTANCE
W
TOLERANCE
POWER
FORM
SYMBOL
RESISTANCE
W
TOLERANCE
POWER
FORM
SYMBOL
10K
–1%
1/16W
C
C102
10K
–1%
1/16W
C
C103
–1%
1/16W
C
C104
10K
–1%
1/16W
C
C105
R826
1K
–5%
1/16W
C
C106
0.22u,50V
R827
3K
–5%
1/16W
C
C107
0.047u,25V
R828
10K
–5%
1/16W
C
C108
0.022u,50V
R829
5.1K
–5%
1/16W
C
C109
56u,50V
1K
–5%
1/16W
C
R821
1/16W
C
R511
10K
–5%
1/16W
C
R611
10K
–5%
1/16W
C
R822
1/16W
C
R512
10K
–5%
1/16W
C
R702
200
–5%
1/10W
C
R823
1/16W
C
R513
10K
–5%
1/16W
C
R703
100
–5%
1/10W
C
R824
C
R514
10K
–5%
1/16W
C
R704
100
–5%
1/10W
C
R825
1/4W
C
R515
10K
–5%
1/16W
C
R705
–5%
1/16W
C
1/4W
C
R516
10K
–5%
1/16W
C
–5%
1/4W
C
R401
390
–5%
1/16W
C
R517
10K
–5%
1/16W
C
R706
1K
–5%
1/10W
H
–5%
1/4W
C
R402
390
–5%
1/16W
C
R518
10K
–5%
1/16W
C
R707
10
–5%
1/10W
H
R403
390
–5%
1/16W
C
R519
10K
–5%
1/16W
C
R708
5.1K
–5%
1/16W
C
1/16W
R102
10K
–2%
1/16W
C
R308
12.7K
–1%
R103
1.2K
–2%
1/16W
C
R309
1K
–5%
R104
1.0
–5%
1/4W
C
R310
12.7K
–1%
R105
1.5
–5%
1/4W
R106
1.5
–5%
R107
1.5
–5%
R108
1.5
R109
1.5
1K
INDICATION
PCB
INDICATION
PCB
R404
390
–5%
1/16W
6.8K
–5%
1/16W
C
R201
5.1K
–5%
1/10W
C
R405
5.1K
–5%
1/16W
C
R520
10K
–5%
1/16W
C
R710
680
–5%
1/16W
C
R202
2K
–5%
1/16W
C
R406
5.1K
–5%
1/16W
C
R521
10K
–5%
1/16W
C
R711
180
–5%
1/10W
C
R203
2.7K
–5%
1/16W
C
R522
10K
–5%
1/16W
C
R712
100
–5%
1/10W
C
R911
R204
5.1K
–5%
1/16W
C
R523
10K
–5%
1/16W
C
R713
100
–5%
1/10W
C
R912
R206
5.1K
–5%
1/16W
C
R801
3.3K
–5%
1/10W
C
R913
R210
1M
R211
R302
R303
0
1K
10K
–5%
1/16W
C
–5%
1/16W
C
–5%
–5%
1/16W
1/16W
C
C
FORM
H
C601
150u,35V
D (PF)
H
C605
100u,10V
D (UR)
C
0.1u,25V
C
C
C701
33u,10V
220P,50V
C
C
C702
F
H
C
C
C
C
C802
D (PF)
H
C803
R830
5.1K
–5%
1/16W
C
IC501
ULN2003ANS
C
Q502
RN1414-TR
C
1000P,50V
C
C
Q503
RN1414-TR
C
C704
0.1u,25V
C
C
Q701
2SC2462LC
C
C801
150P,50V
C
C
Q702
2SA1121SC
C
0.15u,50V
F
H
Q801
2SC4398
C
0.1u,25V
C
C
Q802
2SA1121SC
C
C
C
Q803
2SC2618RC
C
C
2SC3360
C
–5%
1/10W
C
C822
1000p,50V
C
C
1K
–5%
1/4W
C
C823
0.047u,16V
F
C
BUZZER
C824
0.01u,50V
C
C
SYMBOL
MODEL
FORM
BZ1
PKM13EPY
H
1/16W
C
R803
120K
–5%
1/16W
C
R914
1K
–5%
1/4W
C
R804
120K
–5%
1/16W
C
R915
1K
–5%
1/4W
C
C301
0.1u,25V
C
C
R503
10K
–5%
1/16W
C
R805
120K
–5%
1/16W
C
R916
3.3K
–5%
1/16W
C
C302
0.1u,25V
C
C
R806
120K
–5%
1/16W
C
R917
3.3K
–5%
C303
0.1u,25V
C
C
10K
H
2SC2462LC
–5%
R605
RED
C
Q903
10K
R604
SLR-332VC3F
BR24C02F
C
R525
C
LD704
IC401
F
C
C
C
C
H
0.01u,55V
C
1/16W
HD6433644H
RN1414-TR
C
D
C821
1/16W
1/16W
IC1
Q501
C
C
1/16W
–5%
H
C
–5%
–5%
H
YELLOW
C
–5%
10K
GREEN
SLR-342YC3F
2SC2462LC
10K
10K
SLR-332MC3F
LD703
2SJ245S
10K
R507
LD702
H
Q821
R502
R506
C
MC7805CT
Q902
R501
R602
MC34063AM
REG2
Q901
C
–5%
1/16W
C
1/16W
C
1K
–5%
1/16W
C
R807
4.3K
–5%
1/16W
C
R919
20K
–1%
1/16W
C
1K
–5%
1/16W
C
R808
4.3K
–5%
1/16W
C
R920
2.21K
–1%
1/16W
C
–5%
1/16W
C
R809
10K
–5%
1/16W
C
C401
0.1u,25V
1u,16V
C
C
C
C
R508
10K
–5%
1/16W
C
R606
10K
–5%
1/16W
C
R810
360
–5%
1/10W
C
R930
1K
–1%
1/10W
C
C501
R509
10K
–5%
1/16W
C
R607
10K
–5%
1/16W
C
R811
1K
–5%
1/16W
C
R931
8.25K
–1%
1/10W
C
C502
0.1u,25V
C
C
R608
1K
–5%
1/16W
C
R812
39
–5%
1/4W
C
R932
5.1K
–5%
1/16W
C
C503
0.1u,25V
C
C
R609
1K
–5%
1/16W
C
R813
39
–5%
1/4W
C
C504
0.1u,25V
C
C
C901
220u,50V
D (PF)
D (WX)
C
C933
10u,16V
D (WX)
C
C942
0.1u,25V
C
C
SYMBOL
MODEL
NJM2903M-T
C
IR-RECEIVER
GP1U771R
H
SWITCH
SYMBOL
MODEL
FORM
SW1
SKHHANA010
H
SW2
JSA2220
H
DIODE
FORM
D101
G4DL-6140
H
D102
D1FS6
C
D401
DAN202K
C
D403
DAP202K
C
FORM
D701
DAP202K
C
PTZ5.1
C
D702
DAP202K
C
PTZ20A
C
D821
DAN202K
C
ZD103
RLZ6.8A
C
D901
LFB01
C
D902
D1FL20U
C
D903
LFB01
C
C
COLOR
H
ROOM,HEX. THERMISTOR
WHITE
H
TO INDICATING P.C.B.
CN4
ZR 5P
(TOP ENTRY)
IVORY
H
AUTO SWEEP MOTOR
CN6
ZR 3P
(TOP ENTRY)
IVORY
H
TEST PIN
FORM
CN7
XH 4P
(TOP ENTRY)
BLACK
H
HA TERMINAL
C
CN8
ZR 4P
(TOP ENTRY)
IVORY
H
EEPROM
H
THERM FUSE
XH 3P
(5P, TOP ENTRY)
WHITE
H
FAN MOTOR
INDUCTOR
L101
FORM
RATED VALUE
82uH, 1.3A
H
H
L102
560uH, 0.6A
L501
W 0.2A
450 (100MHz),
C
L901
450uH, 1,5A
H
CHIP JUMPER
JUMPER
MODEL
0W
,1/10W
FORM
C
IC PROTECTOR
MODEL
RATING
FORM
ICP1
ICP-S0.5
0.5A
C
ICP2
CCP2E-50
2.0A
C
SYMBOL
REMARK
WHITE
(TOP ENTRY)
CN9
SYMBOL
FORM
(TOP ENTRY)
PH 6P
INDICATION
PCB
SYMBOL
ZD101
RLZ27D
EF0S1005E5, 10MHz
MODEL NO.
PH 4P
CN2
CN10
ZD102
ZD201
MODEL
SYMBOL
OSC1
MODEL NO.
ZENER DIODE
10u,16V
COM801
SYMBOL
INDICATION
PCB
INDICATION
PCB
INDICATION
PCB
CN1
OSCILLATOR
SYMBOL
H
C932
FORM
COLOR
REG1
C
1/16W
MODEL NO.
C
C
–5%
CONNECTORS
SYMBOL
C
1/4W
47
FORM
2SA1121SC
–5%
1K
MODEL NO.
2SC2462LC
C
INDICATION
PCB
SYMBOL
Q202
C
0.1u,25V
10K
C
FORM
C202
R524
1/16W
MODEL NO.
C201
C
–5%
SYMBOL
Q201
C
1/16W
10K
FORM
D (WX)
–5%
R505
0.1u,25V
TYPE
100u, 4V
10K
10K
CAPACITANCE
F
D (PF)
R500
R601
SYMBOL
C804
C
R709
TYPE
LED
IC
TRANSISTOR
CAPACITANCE
F
8.25K
R610
–5%
SYMBOL
470u,50V
C
1K
FORM
C101
1/16W
R307
POWER
C
–5%
C
TOLERANCE
1/16W
10K
1/4W
W
–5%
R510
–5%
RESISTANCE
1K
C
1.0
R101
FORM
– 45 –
MOUNTING
R : RADIAL
C : SMD
A : AXIAL
H : HAND INSERT
C210
0V
0V
+5V
C808
C802
R235
1A
1B ELECTRIC
WDT VALVE
MD0
MD1
Ø
STBY
RESET
NMI
Vss
EXTAL
XTAL
Vcc
ADS0 THERMISTOR
ADS1 EXCHANGER
ADS2
RES0
AVss
Vd
Id
7
- 2
+ 3
+ R288
- 6
+ 5
4
0V
0V 0V
1 6 7
M
R320
+5V
0V
R325
0V
0V
5V
0V
CN20 WHT
1 2 3 4
1/1000
1/100
1/10
1 2 3
CN19 WHT
CN18 WHT
TEST PIN
0V
0V
R
E2PROM
CN17 WHT
2K
2%
1/16
R310
R311
R312
2K
2K
10K
2%
2%
1%
1/16
1/16
1/16
R313
5.1K
5%
1/16
C 1608
C 1608
C 1608
R204
1/4
A
1/4
1/4
A
A
R801
3g
5%
1/4
C
R802
R803
R811
3g
3K
3g
5%
5%
5%
1/4
1/16
1/4
C
C
C
R812
3g
5%
1/4
C
R813
3K
5%
1/16
C
R208
200
5%
R209
R210
200
200
5%
5%
1/10
1/10
C 2125
C 2125
R211
R212
200
2K
5%
5%
10K
5%
C 2125
C 1608
C 1608
R314
R214
R215
1/10
1/16
1/16
R315
R316
1K
5%
1/16
R216
10K
10K
5%
5%
1/16
1/16
C 1608
C 1608
R217
R218
R219
10K
10K
10K
5%
5%
5%
1/16
1/16
1/16
C 1608
C 1608
C 1608
R317
R318
R319
1K
1K
1K
5%
5%
5%
1/16
1/16
1/16
R320
1K
5%
1/16
C 1608
MARK
R220
R221
1M
10K
5%
1%
1/16
1/16
C 1608
C 1608
␮
V
1/16
1/16
1/16
C 1608
C 1608
C 1608
1/16
1/16
1/16
1/16
C
C
C
C
1608
1608
AC250
5%
5%
5%
5%
5%
5%
5%
0.01
510
10K
10K
10K
10K
1K
2.7K
C001
R222
R226
R227
R322
R323
R324
R325
R326
C002
0.01
AC250
C R
C R
1608
1608
C003
C004
0.56
630
F H
R231
10K
10K
5%
5%
1/16
1/16
C 1608
C 1608
C
C
C
C
C
C
C
C
1608
1608
1608
C007
0.01
AC250
F H
C R
C R
5%
C008
C010
AC250
10K
1608
C 1608
0.01
R331
1/16
1/16
1/16
1/16
1/16
AC400
1/16
1/16
1/16
1/16
5%
5%
5%
5%
4.0
5%
5%
5%
5%
470
1.6K
4.3K
10K
C005
C006
100
10K
10K
10K
R327
R328
R329
R330
R237
5.1K
5%
1/16
C 1608
R332
R501
10K
1K
5%
5%
1/16
1/16
C 1608
C 1608
C011
C013
0.01
AC250
R238
100
100
5%
5%
1/16
1/16
C 1608
C 1608
1608
1608
1608
AC250
C R
C R
C 1608
C 1608
C 1608
C
C
C
C
C
0.01
1/16
1/16
1/16
5%
5%
5%
5%
5%
C014
5%
5%
5%
1K
1K
1K
1K
1K
1/16
1K
10K
100
R502
R503
R504
R505
R506
C015
C016
0.01
0.01
AC250
AC250
C R
C R
1608
1608
C017
0.01
AC250
C R
R244
2K
5%
1/16
C 1608
C 1608
1/8
1/8
C021
220
200
D H
R247
3.16K
1%
1/16
C 1608
R248
R249
1K
20K
5%
1%
1/16
1/16
C 1608
C 1608
R509
R510
R511
5.1K
5.1K
5.1K
5%
5%
5%
1/8
1/8
1/8
C 3216
C 3216
C 3216
D H
1/16
5%
5%
200
5%
5.1K
5.1K
220
5.1K
R507
R508
C020
R245
R250
5%
5%
1/16
1/16
C 1608
C 1608
R512
R521
5.1K
10K
5%
5%
1/8
1/16
C 3216
C 1608
R251
R253
R254
R255
R256
10K
10K
R522
10K
5%
1/16
C 1608
3.32K
100
2K
10K
1%
5%
5%
5%
1/16
1/16
1/16
1/16
C
C
C
C
R523
R524
R525
10K
10K
10K
5%
5%
5%
R526
10K
5%
1/16
1/16
1/16
1/16
C 1608
C 1608
C 1608
C 1608
R257
3K
5%
1/16
C 1608
5.1K
5.1K
5%
5%
1/16
1/16
C 1608
C 1608
C 1608
C 1608
C 1608
R232
R233
R234
R235
R236
1608
1608
1608
1608
1608
1608
1608
1608
1/16
1/16
1/16
1/16
5%
5%
1/16
1/16
1K
100
5%
5%
1/16
1/16
C 1608
C 1608
R265
R266
R267
R268
2K
10K
3K
1K
5%
5%
5%
5%
1/16
1/16
1/16
1/16
C
C
C
C
1608
1608
1608
1608
R601
R269
8.25K
1%
1/16
R270
10K
1%
1/16
R271
R272
10K
10K
1%
1%
1/16
1/16
C 1608
C 1608
R273
R274
R275
R276
R277
R278
R279
1K
5.1K
5%
5%
1/16
1/16
C 1608
C 1608
2K
5%
1/16
C 3216
C 3216
C 1608
1/16
C 1608
R602
2K
5%
1/16
R603
R604
2K
100
5%
5%
C 1608
R605
100
5%
1/16
1/16
1/16
C 1608
C 1608
C 1608
C 1608
C 1608
R606
R607
100
100
5%
5%
1/16
1/16
C 1608
C 1608
R608
R609
R610
4.02K
4.02K
4.02K
1%
1%
1%
1/16
C 1608
C 1608
C 1608
C 1608
C 1608
C 1608
5.1K
390
5%
5%
1/16
1/16
C 1608
C 1608
390
5%
5%
1/16
1/16
C 1608
C 1608
JUMPER
C 1608
C 1608
R321
5.1K
5.1K
C213
5%
C 1608
C 1608
C 2125
R535
R536
C301
2.7K
JUMPER WIRE
3.3K
5%
1/16
1/16
1/10
C 1608
C 1608
C302
A
A
5%
5%
1/16
1/16
R256
1/4
1/6
10K
10K
1%
1%
0V
R725
R726
R730
5%
5%
C 1608
C 1608
10K
10K
G
R724
2.7K
33
1/16
1/16
R262
R263
R264
0V
R722
R723
5%
5%
R261
Q207 R264
R611
4.02K
1%
1/16
1/16
1/16
R831
10K
5%
1/6
A
R832
R833
7.5K
620
5%
5%
1/2
1/6
A
A
2SC2462LC
C
IC5
IC6
Q502
Q503
2SC2462LC
2SC2462LC
C
C
Q504
2SC2462LC
C
Q505
Q506
2SC2462LC
2SC2462LC
C
C
Q801
Q802
2SC2618RC
2SC2618RC
C
C
Q831
2SC1214CT
R
C203
C205
C206
2200p
0.1±
0.1
50
50
25
C207
C208
C209
0.047
0.1
0.1
50
25
25
C210
C211
C212
0.047
0.1
0.1
50
25
25
C213
C214
C215
0.047
0.068
0.1
50
16
25
C216
C217
C218
4700p
0.047
0.068
50
50
16
C219
C220
C221
4700p
22
0.1
50
6.3
25
C222
C223
C224
0.1
0.1
10
25
25
16
C225
C226
C227
0.1
0.1
0.1
25
25
25
C228
C280
C281
0.1
2.2
0.01
25
50
50
C301
C302
0.1
0.1
25
25
C C 1608
C C 1608
C303
C304
C305
0.1
1
1
25
16
16
C306
C307
C308
C309
C402
1
1
1
0.1
100
16
16
16
25
10
C C 1608
C C 2125
C C 2125
C C 2125
C403
C404
C601
100
33
680p
25
25
50
C602
C603
C604
C605
680p
680p
680p
1000pF
50
50
50
50
C606
C607
C608
1000pF
1000pF
0.1
50
50
25
C707
100
25
C708
C709
C710
C714
330
180
330
0.01
25
10
50
1KV
D R
D R
D R
D R
C H
C716
C718
C721
330
220
0.1
10
25
50
D R
D R
C R
C R
C C 1608
C C 1608
C C 1608
D C ⵰4
C C 1608
C C 1608
C C 1608
C C 1608
C C 1608
C C 1608
C C 1608
C C 1608
C C 1608
C C 1608
C C 1608
C C 1608
C C 1608
C C 1608
D C ⵰4
C C 1608
C C 1608
C C 1608
D C
C722
C723
C724
Q280
ZENER DIODE
MARK
ZD101
ZD201
MODEL
C LLDS
⵰3
MARK
MODEL
D C ⵰4
C C 1608
LD301
LT1D67A
C
LD302
LT1D67A
C
LD303
LD304
LT1D67A
LT1K67A
C
C
2125
2125
1608
⵰6.3
D C ⵰8
D C ⵰6.3
C C 2125
C C 2125
C C 2125
C C 2125
C C 1608
C C 1608
C C 1608
C C 1608
2KV
50
C R
C R
C725
C731
100
25
C732
C733
C734
C735
470P
1000pF
1000pF
1000pF
50
50
AC250
50
D R
C R
C R
C R
C H
C736
C737
C740
68
68
470P
50
50
AC250
D R
D R
C R
C801
0.15
50
C802
C803
C804
C805
0.022
0.15
0.01
0.01
16
50
AC250
AC250
F C
F C
F R
C H
C H
REG1
REG2
MC7805CT
SE012N
MARK
MARK
MODEL
D103
D104
D105
D201
D202
D203
D204
D205
D206
D207
D702
INDUCTOR
L006
L007
EXCEL SA35V A
L801
L802
100uH
100uH
H
H
L803
L804
FBA04MA450
FBA04MA450
H
H
FB1
CT1
BL01RN1
S19-J299CT
A
H
0.01
0.01
0.1
AC250
AC250
25
C811
0.15
50
C812
C813
C814
C815
0.022
0.15
0.01
0.01
16
50
AC250
AC250
C820
C821
C822
0.01
0.01
0.1
AC250
AC250
25
C H
C H
C C 1608
F C
F C
F R
C H
C H
C H
C H
C C 1608
MARK
MODEL
PQ8
PQ831
PS2501
PC817X
H
H
PQ102
PS2501
H
AC250
SOP
SOP
SOP
SOP
SOP
SOP
H
H
MODEL
1GH46
1S2076A
1S2076A
1SS120
1SS120
DAN202K
DAP202K
DAP202K
DAN202K
DAN202K
DAN202K
DAN202K
A
A
A
A
A
C SC-59
C SC-59
C SC-59
C SC-59
C SC-59
C SC-59
C SC-59
D715
D716
D801
HN2DO1FU-TE85L
C
D831
1SS120
A
D709
D710
D713
A
A
H
A
H
A
A
A
A
A
A
MODEL
SURGE ARRESTER
MARK
JUMPER WIRE
JW2
JW3
NONE
NONE
A
A
JW5
NONE
A
JW7
JW8
NONE
NONE
JW9
JW10
NONE
NONE
C 1608
C 1608
C 1608
C 1608
MODEL
VARISTOR 1 450NR-12D
VARISTOR 2 450NR-12D
R
VARISTOR 3 450NR-12D
R
SURGE
ABSORBER
R
DSA-102MA-05F25 H
CONNECTOR
MARK
CN1
CN2
CN3A
CN3
CN5
CN6
SWITCH
MARK
MODEL
CN7
X1
MODEL
CSTCS16.OMHZ C
MARK
MODEL
ICP-M75(2.7A) R
FAST FEED
– 47 –
RED
2 ROWS
GRAY
BLUE
WHITE
BLACK
RED
WHITE
WHITE
CN18
CT-5P
MINICT-10P
XA-6P
XA-6P
PH-4P
ZR-12P
CN19
CN20
ZR-4P
WHITE
XH-7P
VH-2P
WHITE
WHITE
CN13
CN14
CN15
CN30
CN31
C H
WHITE
WHITE
CN16
CN17
ICP
MODEL
VH-4P
VH-2P
MINICT-22P
MINICT-11P
MINICT-11P
XA-2P
XA-2P
XA-2P
VH-2P
PH-8P
XH-2P
MINICT-5P
CN11
OSCILLATOR
MARK
CN8
CN8B
CN9
CN10
SERVICE-SW KSM0612BTS R
ICP1
470P
SOP
1GH46
1SS120
RN2Z
AK04
RN3Z
JUMPER WIRE
RU1P
1GH46
1GH46
1SS120
1S2473
D703
D705
D706
D707
D708
CN4
C806
C807
C808
H
PHOTO COUPLER
MARK
470P
0.1
IC7
IC8
HD74HC4051FP
NJM2901M-TE1
NJM2904M-TE3
NJM2903V-TE1
M54567FP
M54567FP
ULN2003ANS
IC3
IC4
D101
D102
RLZ6.8A
LED
C
C
C
C
STR-F6523
IC2
QFP
SOP
DIODE
C C 1608
C C 1608
C C 1608
C C 1608
C
C
C
D
IC1
REMARK
Q501
50
25
50
MOUNTING
REMARK
2SC2462LC
2SA1121SC
0.1
0.1
2200p
CAPACITOR
RATING
MOUNTING
REMARK
Q208
Q209
C MPAK
C MPAK
C MPAK
AX-6M00
E2PROM S24CO2BFJ-TB
C106
C109
C201
C202
C816
C817
C818
MAIN P.W.B.
MOUNTING
2SC2462LC
TYPE
REMARK
A
A
A
2K
2K
1/16
R267
1
1/4
1/4
R205
R206
R207
5%
5%
+5V
5%
R717
R718
Q207
MICON
REMARK
R309
C 1608
C 1608
C 1608
C 1608
C 1608
C 1608
C 1608
C 1608
C 1608
C 1608
0.39
JUMPER WIRE
8.2
5%
R716
C SC-59
C SC-59
C MPAK
MOUNTING
1/16
1/16
1/16
1/16
1/16
1/16
1/16
1/16
C
C
C
C
C
C
R
RN2402
RN2402
2SC2462LC
REMARK
5%
5%
2%
5%
C 1608
C 1608
2SA673
Q201
Q202
Q206
MOUNTING
1%
5%
100
100
2K
5%
5%
2K
5.1K
5.1K
0V
REMARK
3.01K
100
R305
R306
R308
10K
10K
R533
R534
Q206 R254
MOUNTING
REMARK
R303
R304
R201
R202
C 1608
C 1608
R255
D207
C 1608
C 1608
0V
Q209
1/16
1/16
1/16
R258
+5V
C214
C216
C215
7
IC5
1%
1/16
R265
4
3.01K
A
1%
1%
C217
R291
+
0V 0V 0V
1 2 3 3 5 6 7 8 9 10 11 12
R273
D206
R257
R268
Q208
R269
R259
R272
R262
8
S
R271
R261
R270
R260
B 10
A 11
X3 12
5 +
6 -
1
R302
A
A
A
A
5%
R266
R319
5 X5
2 X6
X7
4
C219
R323
R324
R318
R280
+5V
ÇR290
13 X0
R317
12V
3 +
2 -
1/16
1/16
1/16
1/6
2
1/6
1/6
1/6
1/6
A
R
1%
5%
1%
5%
1K
+5V
8
5%
5%
1%
5%
1%
1K
510
1.69K
1K
8.25K
10K
0V
C218
JW10
14 X1
C224
JW9
X 3
C 9
R295 R294 R292 ZD201
C222 R293
C223
JW8
R263
16
15 X2
R316
JW7
IC2
R282
R313
WHT
CN9
C309
R330
R331
R332
R314
WHT
CN8
R321
R322
+5V
1K
1K
3.74K
2.4K
1
R259
R260
+5V
+5V
R297
R298
R301
1608
1608
1608
1608
1608
1608
C 1608
C 1608
C 1608
A
R258
C303
R301
R302
R303
+5V
1/16
1/16
1/16
1/16
1/16
1/16
A
R221
R304
R305
R306
0V
5%
5%
5%
5%
5%
5%
1/6
1/6
D205
C281
C205
R253
C212
4.7K
3K
1.6K
27K
5.1K
10K
5%
5%
R531
R532
T
+
L
+ R245
R222
R218
R217
R214
R251
R250
R248
8
0V
R297
R298
BLU
0V
-5V
0V
+5V
+12V
+17V
LARGE PIPE (INDOOR 2)
R
S
R220
Q280
R281
BLU
RED
CN7
1
R287
C208
P
4 5 12 13
R327
R328
R329
GRY
65
OUTDOOR TH. 64
DEF 63
OH 62
Is 61
P
IC4
X1
R326
GRY
SMALL PIPE (INDOOR 2)
BLK
CN6
IC6
INH
BLK
1
2
3
4
5
6
7
8
CN5
3
14
6
11
X4
RED
16 9 1 8
2S VALVE PIPE 1.2, 3S VALVE PIPE
41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60
C221
+5V
2
15
7
10
C225
COOL
IC7
C304
C305
C306
C307
C308
RED
3
14
6
11
SERVICE-SW
4 5 12 13
R208
R209
R315
1
2
BLK
LARGE PIPE (INDOOR 1)
C226
R308
R309
R310
R311
R312
SMALL PIPE (INDOOR 1)
1
2
16 9 1 8
2
15
7
10
WHT +5V
BLK
ELECTRIC EXPANSION
VALVE THERMISTOR
R35:1.433k⍀⫾2%
BO/70:3400K⫾2%
R210
R211
R212
0V 0V
MICON
AX-6M00
}
+5V
WHT
CN16
6
5
4
M
3
2
ELECTRIC EXPANSION
1
VALVE (INDOOR 2)
RED
CN15
6
5
4
M
3
2
ELECTRIC EXPANSION
1
VALVE (INDOOR1)
0V
+5V
NORMAL
R803
+5V R285
N
C280
R801
R802 Q801
C801
+12V
LD301
LD302
LD303
LD304
+5V
C220
D801
+5V
O
R247
R289
0V 0V
0V
NF COIL 4
B
G
NC 80 R234
ACT-CHOP 79 R233
PAM 78 R232
ACT ON/OFF 77
76
R231
FANCHOP 75
74
C227
R227
73
R226
SD02 72
C228
71
SD12
SD01 70
SD11 69
AVcc 68
VREF 67
C206
1.2, FN, FAST FEED 66
D204
+
C737
R216
C816
C817
R215
C814
L804
C815
R813
R291
R292
R293
R294
R295
R296
3.9K
7.5K
R203
R239
R240
R242
R243
R286
C818
5V
0V
20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
21 Vcc
22
R201 CHING
23 2 WAY VALUE
R202 24
4 WAY VALUE
25
R219 OPERATION RELAY
26 IN RUSH RELAY
27 POWER RELAY
28 SELF DIAGNOSIS 1
R203 29
SELF DIAGNOSIS 2
R204 30
Vss
31 SELF DIAGNOSIS 2
R205
32
R206 15/20A
33 COOLING O/P
R207
34 HEATING O/P
R296
35 2A
36 2B
37 2A
38 2B
39 1A
40 1B
R812 Q802
C811
C812
C201
4
3
2
1
0V
R249
NF COIL 5
C
B
A
FM-60˚el
R811
ICP1
(2.7A)
L802
0V INTERFACE RELAY 20V
C813 C821
A
5V
+5V
+12V
OUTDOOR THERMISTOR
R35:1.433k⍀⫾2%
BO/70:3400K⫾2%
C211
R276
R277
D202
FORCE COOL
SCL(E2PROM)
SDA(E2PROM)
Vss
IF-CLOCK
NC
IPCUT
POR
Ø60
W+
V+
WVU+
U-
NF COIL 2
R236 R237
C806
C807
C804
L803
C805
7
C207
R239
R238 R244
C607
C606
C605
C209
L801
0V INTERFACE RELAY 10V
C803 C820
5
R240
R242
R243
R730
1
2
1
2
3
4
D201
+12V
TERMINAL CN1 WHT
BRN
1
C
INDOOR 1
3
D
RED
1
2
8
7
6
5
0V
BRN
OH THERMISTOR
R110:1.28k⍀⫾5%
B100/110:
4400K⫾150K
DEF THERMISTOR
RO:5.9k⍀⫾5%
BO/25:3400⫾2%
2
E PROM
R278
R833
RED
TERMINAL
BLU
C
INDOOR 2
D
YEL
+5V
0V
C202
1/16
1/16
1/16
A
A
A
A
H
A
A
Q101
C R
C R
D R
REMARK
O
5%
1%
5%
1/4
1/4
1/6
1/4
1
1/4
1/4
F H
50
50
10
MODEL
MOUNTING
17V
N
1K
1K
10K
5%
5%
5%
5%
5%
5%
5%
630
0.1
1000p
100
C103
C104
C105
MARK
REMARK
R607
M
R288
R289
R290
C 1608
C 1608
C 1608
10
1.8K
75
3.3K
8.2K
3.3K
680
0.082
C102
REMARK
R606
R521 Q501
R522
Q502
R531
R532 R523 Q503
R524
Q504
R533
R534 R525Q505
R526
Q506
R535
R536
1/16
1/16
R708
R710
R711
R712
R713
R714
R715
C101
MOUNTING
K
R605
R279
8
CN14 GRY
L
Q201
1%
5%
A
A
A
A
A
A
A
A
REMARK
J
2K
2K
1/2
1/2
1/6
1/6
1/6
2125
C 2125
1/2
1/2
2
MOUNTING
1
5%
5%
5%
5%
REMARK
10
2
360
560K
560K
100K
V
MOUNTING
W-
IP
9
3
R284
R285
R286
R287
R701
R702
R703
␮
REMARK
V-
8
4
H
W
MOUNTING
GL2 NGW
W+
7
5
U+
V+
6
6
5%
5%
5%
5%
%
IC
REMARK
GL1 NGV
0
A - NGU
5
7
100
100
100
360
5%
5%
1%
1%
5%
C
C
C
C
1608
1608
1608
R280
R281
R282
R283
470K
470K
3.6K
3K
30K
JUMPER WIRE
1/16
1/16
1/16
1/10
1/10
A
H
A
A
⍀
MOUNTING
CB
A
V
W
OC PGW
VCW
F
SUB VCV
SVB PGV
SWT
U
VCC VCU
SWB
4
8
R506
C105
POWER RELAY COIL
IN RUSH CURRENT
RELAY COIL
D103
14
+5V +5V
Q202
+12V
IC8
9
1
2
3
4
5
6
7
16
15
14
13
12
11
10
3
9
R505
13
D203
R284
2
C404
R604
3 IC3
+ 7
- 6
+ 5
- 4
+ 11
- 10
+ 9
- 8
12
5%
R108
R109
R110
R114
R115
1
R504
0V
1
T
2.2
R105
R106
R107
R503
C402 + +
C403
10
11
C608
+5V
12
13
14
15
16
17
18
19
20
21
22
9
8
7
6
5
4
3
2
1
NF COIL 3
K
+12V
R005
R009
R010
R011
R101
R102
R103
1/4
10
10
1/2
5
W
MODEL
MOUNTING
3 2
R832
R831
+
C736
+5V
5%
5%
5%
5%
R104
10
54 3 2 1
39
100
100
470K
%
MARK
REMARK
Q831
PQ831
D102
3
+5V
4 1
D831
1
12V
REG2
R726 D725
D708
CN2
12V
14
14 15 16
CN13 WHT
0V
R283
11
10
C822
4
13
R001
R002
R003
R004
⍀
TRANSISTOR
RATING
MARK
MOUNTING
R710
1
R711
1
2 2
PQ8
C724
3
R725
12
W
RATING
MARK
REMARK
22
C733
RED
+
11
R274
R275
D707
CN11 GRY
2
-5V
R713
21
1
5
+12V
BLU
CN4
C740
C710
C722
C723
D716
R716
R715
0V
C734
2
4
J
-5V
20
11
R722
D715 R724
+5V
+
C721 C716
15
D703
C731 +
5
C732
3
R723 D706
12
FB1
+
10
E F GH I
+17V
CN3A
9
8
7
6
5
4
3
2
1
R714
C709
D702 R708
4
1
2
D705
14
IC1
3
3
2 3
1
2
3
4
5
6
7
8
9
11
10
FM-0V
9
5
4
3
21
19
18
17
20
C203
GRY
CN3
0V
REG1
+
C708
13
9
8
15
R502
19
D709
7
16
9
+
FM-15V
+
C707
+12V
C735
6
17
U+
5 4
R712
R718 D710
18
C714
5
18
17V
R114
R108
1
R702 R701 R703
4
19
20
2
28
1
0V
3
13
+17V
+C718
17
2
21
+
16
1
22
6
GND VIN
7
0V
0V
REVERSING VALVE
VFB 5
1
D104 R110
23
0V
(4)
SWITCHING TRANS
R717 D713
24
OV
FM-0V 0V
(9)
25
-
R109
26
%
Id
FM-0V
R106
27
CT 15
OVP 4
2 IIN
3 VDET
28
0V
VC 9
1 IFB
PQ102
32
WHT
SYNC 14
10 IDET
CN30 WHT
XH-7P
C102
1
2
0V12 ON/OFF
0V 11 CS
0V
VCC
OUT 8
⍀
RATING
MARK
TYPE
MOUNTING
24
0V10 0V
13 REF(5V)
R501
R101
RED
8
7
6
SUT PGU
Q101
D101
YELLOW
12 11 10
SVT
R107
R104
R103
5V
41
CN8B
+
D
R608
R609
R610
R611
+
(5)
WHT
CN10
WHT
BLK
U
V
W
23 22
D105
2
C
FM
C104
1
+
-
CAPACITOR
RATING
MARK
WHITE
WHT
1 2 3 4 5
CN13
E F G H I
321
CN12
25
D
1
2
3
4
5
6
7
FM-15V
ZD101
C106 R105
SPS
(1)
26
C
1
2
3
C101
+
-
U
V
W
30
C109
(3)
COMPRESSOR MOTOR
R507
R508
R509
R510
R511
R512
JW2
27
C604
C603
C602
C601
+
FM-15V
R115
(7)
WHT
29
R603
+
R102
B
C021 C020
C013
R011 R010
C014
L006
RESISTOR
P2
N1
WHT
R601
R602
C011
3A FUSE
C004
C006
R004
C103
R009
0V
C008
JW5
CN31 RED
METAL COVER
DS
C015 C016
A
GRN 3
+
-
JW3
VARISTOR2
R005
C017 0V
GRN 2
METAL COVER
CT1
SPM2
SPM2-CAPA
P1
R002 R003 IN RUSH CURRENT RELAY
BLU
L007
C007
WHT
GRN 1
YEL
L2
+
YEL
GRY
C005
VARISTOR3
N
R001
C002
SURGE
ABSORBER
C001
BLK
C003
L
D25VB60
POWER RELAY
MOUNTING
YEL
L1
NF-COIL1 COMMON MODE COIL
25A FUSE
VARISTOR1
TERMINAL
REMARK
REACTOR
POWER P.W.B.
TYPE
F : FILM
C : CERAMIC
D : ELECTROLYTIC
MOUNTING
MODEL RAM-50CNHZ2
WHITE
WHITE
WHITE
RED
WHITE
WHITE
WHITE
BLOCK DIAGRAM
INDOOR
RAS-20CNHZ2
MODEL
L
Rotor pole position
desition detector
Terminal
Board
C
Indoor / Outdoor
interface circuit
D
Peak current cut off
circuit
DC fan motor
drive circuit
FM
Indoor fan motor
Voltage amplification
circuit
RAS-30CNHZ2
Over heat thermistor
Wireless receive
circuit
Defrost thermistor
Buzzer circuit
Room temperature
thermistor
Temporary switch
Initial setting
circuit
Indicating lamp
Operation.
Timer.
Dehumidifying.
Indoor / Outdoor
interface circuit 1
Indoor Unit 2
C
M
Auto sweep motor for
Air deflector
Indoor / Outdoor
interface circuit 2
D
Clock
circuit
Terminal
Board
Indoor / Outdoor
interface circuit
Electric Expansion
valve drive circuit
Outdoor temperature thermistor
Indoor micro computer (AX-7M12)
Auto-restart
Peak current
cut off
Lower arm drive
circuit
D
C
Reversing valve coil
D
Relay drive
circuit
Auto sweep motor for
Air deflector
Power circuit
(For Indoor 2 P.W.B)
Relay circuit
M
Upper arm drive
circuit
C
Micro computer
clock circuit
Heat exchanger
temperature
thermistor
DC compressor
motor
Indoor Unit 1
Overload external
judgement circuit
LCD wireless
M
Power module
Inrush current
Protection circuit
Operation.
Timer.
Reset circuit
MODEL
PAM Power
circuit
Trip signal
synthesis circuit
Initial setting
circuit
Indicating lamp
Outdoor fan motor
Self-diagnosis
circuit
Temporary switch /
Auto Restart
Indoor micro computer (AX-7M12)
Room temperature
thermistor
Magnetic relay
N
Buzzer circuit
Heat exchanger
temperature
thermistor
FM
Power source1 ¿50Hz, 220-240V
Wireless receive
circuit
LCD wireless
RAM-50CNHZ2
Outdoor micro computer (6M00)
MODEL
OUTDOOR
DC fan motor
drive circuit
Reset circuit
DC35V
Micro computer
clock circuit
FM
Power circuit
(Indoor and outdoor P.W.B)
Indoor fan motor
– 49 –
M
Electric
expansion valve
BASIC MODE
MODEL RAM-50CNHZ2
– 51 –
New Cool Rhythm
Room temperature
Minimum
5min.
5min.
Minimum 5min.
5min.
Minimum
5min.
Cooling Sleep Operation
Minimum
5min. 5min. 5min.
Minimum 5min.
5min.
Minimum
5min.
Final set temperature
(Cooling/dehumidifying set
temperature (+) sleep shift)
Final set temperature
SFCMIN
(shift lower limit)
(Cooling/dehumidifying
set temperature
(temperature set by remote
control (+) SHIFTC)
(Cooling/dehumidifying set
temperature = Remote control set
temperature (+) SHIFTC)
0.5hr
1.5hr
2.5hr
3.5hr
6hr
7hr
3hr
Set to 7 hours
Set temperature during rhythm
(temperature set by remote control
(+) SFTRZM)
Sleep key
Operation lamp
Timer lamp
Thermo judgment
Thermo OFF
5 sec.
Hi
4.5 sec.
Outdoor fan
2.5 sec.
See basic operation.
Rhythm Lo
Med
Outdoor fan
Lo
2.5 sec.
Lo
15 sec.
Lo
Compressor speed
Rhythm Med
5 sec.
Maximum speed
P1
Compressor speed
New cool rhythm
Indoor
fan
2.5 sec.
See basic operation
Lo (sleep)
1 cycle
Lo
Hi
Med
Indoor fan
Notes:
(1) New cool rhythm is engaged when the fan speed is “auto” and the room temperature is less than
set one plus 0.66˚C in the “auto” operation mode or cooling mode.
(2) The minimum new cool rhythm time is 10 minutes when the temperature falls and rises.
(3) Cool rhythm is not engaged during Nice temperature, Sleep operation.
(4) Pl control is engaged during new cool rhythm: the speed limit is the same as during normal operation.
(5) The new cool rhythm set temperature is also shifted during thermo OFF.
Notes:
(1) The sleep operation starts when the sleep key is pressed.
(2) 30 minutes after the sleep key is set, the sleep shift of temperature starts, and upper shift is made
at least 6 times. If 25˚C is not reached after 6 shifts, shifts repeat unit 25˚C is reached.
(3) The sleep shift upper value of set temperature is 28˚C.
(4) After 6 hours, a shift down to the initial set temperature is made at a rate of 0.33˚C/5 min.
(5) If the operation mode is changed during sleep operation, the set temperature is cleared, and shift
starts from the point when switching is made.
(6) The indoor fan speed does not change even when the fan speed mode is changed.
(7) When operation is stopped during sleep operation, the set temperature when stopped, as well as the
time, continue to be counted.
(8) If the set lime is changed during sleep operation, all data including set temperature, time, etc. is
cleared and restarted.
(9) If sleep operation is canceled by the cancel key or sleep key, all data is cleared.
– 53 –
rotation speed
Notes:
(1) 30 seconds after the operation is started, when the room temperature is (cooling preset temperature) - (1.33˚C) or less, the operation is
done assuming as the preset temperature = (room temperature at the time) - (2˚C).
(2) The indoor fan is operated in the “Lo” mode, OFF for 5 minutes and ON for 1 minute (at high humidity) or OFF for 6 minutes and ON for
1 minute (at low humidity), repeatedly according to the humidity judgement when the thermostat is turned OFF.
(3) When the operation is started by the thermostat turning ON, the start of the indoor fan is delayed 32 seconds after the start of compressor
operation.
(4) The compressor is operated forcedly for 3 minutes after operation is started.
(5) The minimum ON time and OFF time of the compressor are 3 minutes.
– 55 –
– 57 –
– 59 –
DEFROST
● Reversing valve defrost system is employed: it consists of balancing period → reversing cycle period →
balancing period.
(1)Defrost start condition
● When all the following conditions are established, defrost is executed:
Normal operation
Heat exchange temperature is within defrost range specified by outdoor temperature and heat
exchange temerature.
Defrost inhibit period linked to outdoor temperature has passed.
1
2
3
(2)Defrost release condition
● If any one of the following conditions is established, defrost is released:
Heat exchange temperature returns (heat exchange temperature ⭌ DEFOFF).
Defrost max time of 12 minutes has elapsed.
● Released by condition
during balancing period: When remaining balancing period has elapsed,
returned to initial condition (ASTUS = 0).
● Released by condition
or during reversing cycle period: Shifted to balancing period.
1
2
1
1 2
(3)Outputs during defrost
● Indoor defrost request: Transmitted to all units being operated in heating mode.
● Compresor: Balancing period for [TDF414] seconds → Starting of reversing cycle period by [SDRCT2]
min-1 for [TSKTM2] seconds → Accelerating by [DFCTEP] min-1 / [TDFSPT] seconds in
remaining reversing cycle period until defrost MAX speed [DEFMAX] is reached →
Balancing period for [TDF415] seconds
● Electric expansion valve
Unit being stopped : [FULL CLOSE] 30 seconds after balancing period has passed →
[FULL CLOSE] during reversing cycle period → [PCLOSH] 15
seconds before balancing period is finished.
Unit being operated : [DFCTPS] 30 seconds before balancing period is finished →
Synchronized with step-up of rotation speed of compressor, opened
by [DFSPPS] pulses and reaches MAX opening degree [DEFSMX]
when rotation speed of compressor reaches [DEFMAX].
– 60 –
● Time
chart when executing defrost (both unit 1 and unit 2 operated)
Reversing
valve
Request Compressor Operation
Defrosting signal
Unit 1
Unit 2
Unit 1
Unit 2
Unit 1
Defrosting request
Unit 2
Defrosting request
30sec.
Turns on for
cooling
Cooling output
Heating output
15sec.
Outdoor fan
Defrosting inhibit period
Reverse cycle period (max. 12 minutes)
Balancing period [TDF414] sec.
30sec.
TSKTM2
Compressor
rotation speed
Defrosting sequence
DFSTEPrpm/
TDFSPT sec.
Balancing period [TDF415] sec.
TSKTM1
DEFMAX
Start sequence
SDRCT1
SDRCT2
Electric expansion valve
480
DFPSMX
Hold 500ms
DFCTPS
DFSPPS Pulse
Hold
0
480
DFCTPS
DFPSMX
PSTART
Hold 500ms
Unit 2
DFCTPS
Hold
0
DFSPPS Pulse
DFCTPS
chart when executing defrost (Only unit 1 operated, unit 2 stopped)
Reversing
valve
Request Compressor Operation
Defrosting signal
Unit 1
Unit 2
Unit 1
Unit 2
Unit 1
Defrosting request
Unit 2
30sec.
Turns on for
cooling
15sec.
Cooling output
Heating output
Outdoor fan
Defrosting inhibit period
Reverse cycle period (max. 12 minutes)
Balancing period [TDF414] sec.
30sec.
TSKTM2
Compressor
rotation speed
Defrosting sequence
DFSTEPrpm/
TDFSPT sec.
Balancing period [TDF415]sec.
TSKTM1
DEFMAX
Start sequence
SDRCT1
SDRCT2
480
Electric expansion valve
● Time
PSTART
Unit 1
DFPSMX
Hold 500ms
PSTART
Unit 1
DFCTPS
Hold
0
DFSPPS Pulse
DFCTPS
480
Unit 2
PCLOSH
PCLOSH
0
– 61 –
AUTO-FRESH DEFROST
During heating operation is stopped, and when auto-fresh condition is established, defrost operation will be
performed while operation is stopped.
Auto-fresh consists of balancing period at start of defrost for [TDF414] seconds → Reverse cycle period for
MAX 12 minutes.
(1) Start conditions for auto-fresh
● When all the following conditions are established, auto-fresh is executed:
Defrost request signal is present.
All indoor units are stopped.
15 minutes of auto-fresh inhibit period has elapsed.
Compressor is ON when operation is stopped.
Compressor delay command is sent from indoor unit when operation is stopped.
(2) Release condition of auto-fresh
● If any one of following conditions is established, auto-fresh is released:
Heat exchange temperature returns (heat exchange temperature ⭌ DEFOFF)
12 minutes of defrost MAX time has elapsed.
Failure occurred.
Either unit 1 or unit 2 started operation.
❈ Released during start of balancing period: Stopped or started after remaining balancing period has
elapsed.
❈ Released during reverse cycle period
: Stopped or started after balancing for 3 minutes.
(3) Outputs during auto-fresh
[Indoor unit defrost request]: Transmitted only to unit to which auto-fresh is applied 9indoor unit stopped
last).
[Compressor]: Accelerated by DFSTEP rpm/TDFSPT seconds and reaches defrost MAX speed [DEFMAX].
[Electric expansion valve]:
Unit auto-fresh not applied: FULL CLOSE when balancing for 30 seconds has elapsed at start of defrost.
Unit auto-fresh applied: Synchronized with step-up of rotation speed of compressor, opened by [pulses
and reaches MAX opening degree [DEFSMX] when rotation speed of compressor
reaches [DEFMAX].
(4) Note
● Shifted to auto-fresh in defrost mode when operation is stopped.
● All indoor units must be stopped to fulfill condition for auto-fresh.
If signal is delayed, auto-fresh condition will not be established.
●
1
2
3
4
5
1
2
3
4
Reversing
valve
Request Compressor Operation
Defrosting signal
Unit 1
Unit 2
Unit 1
Unit 2
Unit 1
Defrosting request
Balancing request
Unit 2
Balancing request
30sec.
Turns on for
cooling
Cooling output
Heating output
15sec.
Outdoor fan
Auto-fresh inhibit period 15min.
Balancing period [TDF414] sec.
WMAX2
30sec.
Compressor
rotation speed
WMAX1
Reverse cycle period (max. 12 minutes)
Defrosting sequence
DEFMAX
DFSTEPrpm/
TDFSPT sec.
Balancing period 3min.
TSKTM2
Electric expansion valve
SDRCT2
80sec.
520
480
DFPSMX
DFSPPS Pulse
Hold
Unit 1
DFCTPS
Hold
0
60sec.
520
480
Unit 2
30sec.
Hold
100rpm
Hold
PCLOSH
0
– 62 –
FORCED COOLING
In order to accumulate refrigerant, units operate in cooling cycle.
Execution condition and operation status are shown below.
[Execution condition]
●
With neither indoor unit 1 and 2 not operated, when forced cooling switch is turned ON, forced cooling will
be performed.
●
Always operation status of indoor unit are monitored and forced cooling is inhibited when operation of any
unit is detected.
[Operation status]
●
Outdoor unit fan: Fixed in LO.
●
Compressor rotation speed: Fixed in 3900min-1.
[Note]
●
During forced cooling, if failure occurs in outdoor unit, thermostat is turned off. However, it is not counted.
●
Since rotation speed of compressor is fixed in 3900min-1 during forced cooling, compressor fixed speed
control at start is not performed.
The following shows the operation state of forced cooling.
Power
Compressor
Service switch
Unit 1
Forced cooling request
Balancing request
Unit 2
Forced cooling request
Balancing request
Heating output
Reversing
valve
Cooling output
Turns on
for Heating
Power relay
Main microcomputer
Outdoor fan
Power
100ms
1sec
TSKTM1
Balancing period 3min.
Compressor
rotation speed
31.25PPS
80sec.
[Outdoor temperature<40°C]
<TD control + 3N compensation + Diving control>
PSTART
0
Hold 500ms
Initialization finished
[Outdoor temperature<40°C]
Unit 2
PSTART
0
●
3900rpm
Unit 1
520
480
15sec. + sub
1sec
In-rush Prevention
520
480
❈
Lo
1sec
Operation
Approx 100ms
Electric expansion valve
●
Hold 500ms
TSKTM1 and PSTART are EEPROM data.
– 63 –
<TD control + 3N compensation + Diving control>
REFRIGERATING CYCLE DIAGRAM
Cooling, dehumidifying, defrosting
COMPRESSOR
¿12.7
¿12.7
Indoor unit
Reversing
valve
¿12.7
¿6.35
SUCTION
TANK
Outdoor unit
Service
valve (3/8") Single-ended
union (3/8")
¿9.52 Silencer
¿9.52
¿12.7
¿9.52
AIR FLOW
Service
valve (3/8") Single-ended
union (3/8")
Silencer
¿9.52
¿6.35
Air
Flow
¿6.35
Electric expansion
valve
Service
valve (1/4")
¿6.35
¿12.7
Strainer
¿6.35
Strainer
¿6.35
¿6.35
¿6.35
Electric expansion
valve
IN-CASE CONNECTING TO
INDOOR RAS-30CNHZ2
Service
valve (1/4")
¿6.35
1. Fix the Adapter to Service valve
(¿9.52) as show below.
2. Connect the connecting pipe to
the Adapter.
Air
Flow
Single-ended
union (1/4")
Indoor heat
exchanger
Single-ended
union (1/4")
Strainer
¿6.35
¿6.35
INDOOR 2
Indoor heat
exchanger
¿12.7
Service
valve
10
¿12.7
Heating
¿12.7
COMPRESSOR
INDOOR 1
Adapter
¿12.7
Reversing
valve
¿12.7
¿6.35
Outdoor unit
Indoor unit
SUCTION
TANK
Service
valve (3/8") Single-ended
union (3/8")
¿9.52 Silencer
¿9.52
¿12.7
¿9.52
AIR FLOW
Service
valve (3/8") Single-ended
union (3/8")
Silencer
¿9.52
¿6.35
Air
Flow
¿6.35
Electric expansion
valve
Service
valve (1/4")
¿6.35
¿12.7
Strainer
¿6.35
Strainer
¿6.35
Air
Flow
Single-ended
union (1/4")
¿6.35
Electric expansion
valve
¿6.35
Service
valve (1/4")
¿6.35
Indoor heat
exchanger
Single-ended
union (1/4")
Strainer
¿6.35
¿6.35
Indoor heat
exchanger
– 64 –
DESCRIPTION OF MAIN CIRCUIT OPERATION (INDOOR)
MODEL RAS-20CNHZ2, RAS-30CNHZ2
1. Reset Circuit
5V
R203
ZD201
35V
Normal : Hi
Reset : Lo
R204
C202
10 RES
R206
Q201
+
C201
R202
R201
Q202
Micro Computer
AX-7M12
0V
Fig. 1-1
Voltage
35 DC Line
35V
27V
5V DC Line
5V
Base of Q201
POWER ON
POWER is OFF
Voltage
5V
Collector of Q202
Fig. 1-2
●
●
●
●
●
The reset circuit initializes the program when power is supplied or power is restored following a power failure.
RESET “Lo” or SET “Hi” activates the micro computer.
Fig. 1-2 shows the waveforms in each circuit when power is ON and OFF.
When power is supplied, the voltages on the 35V and 5V lines rise and when the 35V DC line becomes
approx. 27V, ZD201 turns on and the voltage at the Reset voltage Q201 rises to turn Q201 on.
Since the collector of Q201 goes “Lo” at this time , Q202 turns on and the reset input of the micro computer
goes “Hi”. The 5V DC line has already been 5V at this time and the micro computer starts operation.
When power is OFF, the voltage on the 35V DC line drops. and when it is approx. 27V, ZD201 turns off, Q201
and Q202 turn off, and the reset input of the micro computer goes “Lo” to reset it.
– 65 –
2. Receive Circuit
Model: RAS-20CNHZ2
R710
12V
R701
R709
+
–
LIGHT
RECEIVING
UNIT
C701
0V
ZD701
0V
57 Wireless input
R705
C702
0V
0V
Micro computer
AX-7M12
Fig. 2-1
5V
Model: RAS-30CNHZ2
R707
+
–
LIGHT
RECEIVING
UNIT
C701
0V
57 Wireless input
R706
R705
C702
0V
0V
Fig. 2-2
The Light receiving unit receives an infrared signal from the wireless remote control. The receiver amplifies
and shapes the signal and outputs it.
12V
3. Buzzer Circuit
BZ BZ1
Micro computer
AX-7M12
Buzzer output
1
37
R801
●
Micro computer
AX-7M12
16
8
OV
Fig. 3-1 Buzzer Circuit
●
When the buzzer sounds, an approx.
3.9kHz square signal is output from
of the micro
buzzer output pin
computer. After the amplitude of this
signal has been set to 12Vp-p by a
transistor, it is applied to the buzzer.
The piezoelectric element in the
buzzer oscillates to generate the
buzzer’s sound.
U
Metal diaphragm
Pizoelectric element
V
Sound wave
Fig. 3-2 Buzzer Operation
– 66 –
V
4. Auto Sweep Motor Circuit
12V
Micro computer
AX-7M12
12V
CN4
9
1
42
41
5
12
2
4
13
3
40
39
3
14
4
2
15
5
8
Auto sweep motor for
horizontal air deflectors
Rotor
IC501
0V
Fig. 4-1 Auto Sweep Motor Circuit (Horizontal air deflectors)
●
Fig. 4-1 shows the Auto sweep motor drive circuit; the signals shown in Fig. 4-2 are output from pins
– of the micro computer.
k A
Micro computer pins
Horizontal air
deflectors: 10ms.
Step width
Horizontal air deflectors
1
2
3
4
5
6
7
8
42
41
40
39
Fig. 4-2 Micro computer Output Signals
●
As the micro computer’s outputs change as shown in Fig. 4-2, the core of the auto sweep motor is excited
to turn the rotor. Table 4-1 shows the rotation angle of horizontal air deflectors.
Table 4-1 Auto sweep Motor Rotation
Horizontal air deflectors
Rotation angle per step (° )
Time per step (ms)
0.0879
10
– 67 –
5. Room Temperature Thermistor Circuit
●
Fig. 5-1 shows the room temperature
thermistor circuit.
●
The voltage at A depends on the room
temperature as shown in Fig. 5-2.
5
5V
4
Micro
computer
AX-7M12
1 Room
temp. input
R309
Voltage at A (V)
Room
temperature
thermistor
C301
R310
A
0V
0V
3
2
Fig. 5-1
1
0
0
10
20
30
40
Room temperature (ßC)
Fig. 5-2
6. Heat exchanger temperature thermistor circuit
5V
Heat exchanger
temperature thermistor
Micro computer
AX-7M12
R307
Heat
exchanger
temperature
input
64
C302
R308
A
0V
0V
Fig. 6-1
The circuit detects the indoor heat
exchanger temperature and controls
the following.
(1)
5
4
Preheating.
(2) Low-temperature defrosting
during cooling and dehumidifying
operation.
(3) Detection of the reversing valve
non-operation or heat exchanger
temperature thermistor open.
Voltage at A (V)
●
3
2
1
The voltage at A depends on the heat
exchanger temperature as shown in
Fig. 6-2.
0
-10
0
10
20
Heat exchanger temperature (ßC)
Fig. 6-2
– 68 –
30
40
7. Auto Restart / Temporary Switch
●
Auto Restart Switch
MODEL : RAS-20CNHZ2
R704
L501
5V
34 X1
R706
Micro Computer
(AX-7M12)
SW701
AUTO RESTART
NORMAL
Fig. 7-1
MODEL : RAS-30CNHZ2
R601
L501
5V
R602
34 X1
Micro Computer
(AX-7M12)
SW2
AUTO RESTART
NORMAL
0V
Fig. 7-2
●
Temporary Switch
MODEL : RAS-30CNHZ2
C605
R611
36 HA INPUT
R609
C601
TEMPORARY
SWITCH
SW1
5V
0V
Fig. 7-3
– 69 –
Micro Computer
(AX-7M12)
AUTO RESTART SWITCH
12V
TEMPORARY SWITCH
SW701
R709
ZD701
C701
0V
R710
0V
R603
37 X1
MICRO COMPUTER
0V
Fig. 7-1
●
The temporary switch is used to operate the air conditoner temporarily when the wireless remote control
is lost or faulty.
●
The air conditioner operates in the previous mode at the previously set temperature. However, when the
power switch is set to OFF, it starts automatic operation.
8. DC Fan Motor Drive Circuit
●
Fig. 8-1 shows the indoor DC fan motor drive circuit.
CN10
Micro
Computer
(AX-7M12)
+
-
R919
C942
Yellow
M
Indoor DC
Fan Motor
2
1
Blue
R920
R911
Red
4
3
D902
Q902
5
5V
R915 R914 R913 D901 R912
35V
R916
Q903
R917
C933
0V
+
0V
R932
R105
R106
R930
D903
Abnormal Fan
59
Current Sensor
C932
0V
R107
5V
R108
+
-
R109
PWM
60
Feedback
R931
Fan PWM 54
Output
L901
Q901
C901
ICP2
Terminal
Board D
0V
Fig. 8-1
●
The circuit produces the fan motor drive voltages, 8-33V, from 35V DC supplied from the outdoor unit and
controls the fan motor speed.
●
Q903 is switched on and off according to the signal at fan PWM output pin
is smoothed by D901, L901 and C901 to drive the fan motor.
●
The output voltage is divided by R919 and R920 and is input to divided voltage output pin ; the micro
computer controls the fan PWM output so the output voltage is set to the specified value. The chopper
frequency of the fan PWM output is 15.7kHz.
●
In the Fan current detection circuit, 35V line current is detected by R105 ~ R109 and input to abnormal
fan current sensor pin . Microcomputer detects overcurrent comparing it with the current judgment value
corresponding to the fan rotation speed.
L
– 70 –
F to control the voltage which
:
DESCRIPTION OF MAIN CIRCUIT OPERATION (OUTDOOR)
Model RAM-50CNHZ2
1. Power Circuit
POWER P.W.B.
YEL
BLU
SWITCHING POWER P.W.B.
(FOR INDOOR AND OUTDOOR
P.W.B.)
SWITCHING POWER P.W.B.
(FOR INDOOR P.W.B.)
Fig. 1-1
●
This circuit full-wave rectifies 220-230V AC applied between terminals L and N, and boosts it to a required
voltage with the active module, to create a DC voltage.
The voltage becomes 260-380V when the compressor is operated
(1) System power module (SPM2)
(Surrent ACT module, smoothing capacitors
and power module are combined into one
unit)
Active module
The active filter, consisting of a reactor
and switching element, eliminates higher
harmonic components contained in the
current generated when the compressor
is operated, and improves the powerfactor.
Smoothing capacitor smoothes voltage,
which has been rectified by diode stack
and boosted at ACT section.
Power module section
Refer to item 3 System Power Module
Circuit.
1
2
(2) Diode stacks
These rectify the 220-230V AC from
terminals L and N to a DC power supply.
– 71 –
< Reference >
● In case of malfunction or defective connection:
Immediately after the compressor starts, it may stop
due to “abnormally low speed” active error, etc.
The compressor may continue to operate normally,
but the power-factor will decrease, the operation
current will increase, and the overcurrent breaker
of the household power board will probably activate.
● In case of active module faulty or defective contact:
Although the compressor continues to operate
normally, the power-factor will decrease, the
operation current will increase, and the overcurrent
breaker of the household power board will probably
activate.
< Reference >
● If diode bridge 1 is faulty, the compressor may stop
due to “lp”, “abormally low speed”, etc. immediately
after it starts, or it may not operate at all because
no DC voltage is generated between the positive e
and negative d terminals.
If diode bridge (D25VB60) is faulty, be aware that
the 25A fuse might also have blown.
● If diode bridge (DS) is faulty, DC voltage may be
not generated and the compressor may not operate
at all. Also, be aware that the 3A fuse might have
blown.
(3) Smoothing capacitor C501,C52,C503
This smoothes (averages) the voltage rectified by the diode stacks.
+
L
+
–
b
a
+
+
–
–
C501 C502 C503
Vd (DC Voltage)
–
N
Fig. 1-2
a
OV
b
OV
Vd
DC Voltage
Fig. 1-3
(Approx. 330 or 360V during operation)
Smoothing capacitor
(C501, C502, C503)
SPM2
GRN3
GRN1
Power P.W.B
Reactor
Control P.W.B
Diode Stack
(D25 VB60)
Switching Power P.W.B
(For Indoor P.W.B.)
Terminal
Board (2p)
Service-switch
●
Be careful to avoid an electric shock as a
high voltage is generated. Also take care
not to cause a short-circuit through incorrect
connection of test equipment terminals. The
circuit board could be damaged.
(4) Smoothing capacitor (C020, C021)
This smoothes (averages) the voltage rectified by the diode stacks.
A DC voltage is generated in the same way as in Fig. 1-3. Voltage between 丣 side of C020 and 両 side
of C021 is about 330V.
– 72 –
(5) C001 to C005, NF COIL 1
There absorb electrical noise generated during
operation of compressor, and also absorb external
noise entering from power line to protect eletronic
parts.
❈ Be sure to ground outdoor unit.
If not grounded, noise filter circuit does not operate
correctly.
(6) Sugar absorber, varistor 1,2,3
These absorbs external power surge.
❈ If outdoor unit is not grounded, “sugar absorber”,
“varistors 1 and 3” do not operate.
Be sure to perform grounding.
(7) Inrush protective resistor (R002, R003)
This works to protect from overcurrent when power
is turned on.
<Reference>
When inrush protective resistor is defective, diode
stack may malfunction. As a result, DC voltage is not
generated and no operation can be done. In this case,
3A fuse may have been blown.
2.
Indoor/Outdoor Interface Circuit
●
The interface circuit superimposes an interface signal on the 35V DC line supplied from the outdoor unit to
perform communications between indoor and outdoor units. This circuit consists of a transmiting circuit which
superimposes an interface signal transmit from the micro computer on the 35V DC line and a transmiting circuit
which detects the interface signal on the 35V DC line and outputs it to the micro computer.
●
Communications are performed by mutually transmiting and receiving the 4-frame outdoor request signal one
frame of which consists of a leader of approx. 100 ms., start bit, 8-bit data and stop bit and the command signal
with the same format transmit from the indoor unit.
●
From outdoor microcomputer to indoor microcomputer
The request signal output from microcomputer pins
is input to the transmitting circuit. The transmitting circuit
outputs an approx. 38kHz high-frequency signal via pin and continues the output intermittently according to
the request signal. This high-frequency signal is amplified by a transistor, superimposed on the DC 35V line
via C801, C811 and L801, L802 and supplied to the indoor unit.
X
!
To prevent erroneous reception, the outdoor microcomputer is designed so that it cannot receive a signal while
it is outputting a request signal,
The receiving circuit in the indoor unit consists of a comparator and transistor. The interface signal from the
outdoor unit on the DC 35V line is supplied to C821, where DC components are eliminated, and is then shaped
by the comparator. The shaped signal is detected by diode, amplified by amp, and supplied to receiving
input of the indoor microcomputer.
k
Fig. 2-2 shows the voltages at each component when data is trnsferred from the outdoor microcomputer to
the indoor microcomputer.
●
Indoor micro computer to outdoor micro computer
The communications from the indoor micro computer to the outdoor micro computer are the same. Fig. 2-3
shows the voltages and waveforms at each circuit.
– 73 –
●
Fig. 2-1 shows the interface circuit used for the indoor and outdoor micro computers to communicate with
each other.
MAIN P.W.B.
IF RECEIVE
(SD1)
MICRO
COMPUTER
(AX-7M12)
IF TRANSMIT
(SD0)
INDOOR P.W.B.
OUTDOOR P.W.B.
POWER P.W.B.
MAIN P.W.B.
IF CLOCK
MICRO
COMPUTER
(AX-6M00)
IF TRANSMIT
(SD01)
IF RECEIVE
(SDI1)
(Communications from indoor micro computer to outdoor microcomputer)
(Communications from outdoor micro computer to indoor microcomputer)
Fig. 2-1 Indoor / outdoor interface Circuit
– 74 –
0.7V
Base of outdoor P.W.B. Q801, Q802
0V
Outdoor micro computer pin 70 , 72
5V
0V
Indoor micro computer pin 49
5V
0V
Pin 48
5V
0V
35V
35V DC line
100ms.
Leader
33ms.
1 frame
Fig. 2-2 Voltages Waveforms of indoor / Outdoor Micro computers (Outdoor to Indoor Communications)
Base of outdoor P.W.B. Q801, Q802
0V
Outdoor micro computer pin 69 , 71
5V
0V
Indoor micro computer pin 49
5V
0V
Pin 48
5V
0V
35V
35V DC line
5~7.5ms.
Transmit / receive
switching time
33ms.
1 frame
Fig. 2-3 Voltages Waveforms of indoor / Outdoor Micro computers (Indoor to Outdoor Communications)
– 75 –
N
L
Terminal
board
Noise filter
coil
R004
C006
R002
– 76 –
ACT MODULE
–
–
–
R24
–
+
U–
U
W–
W
INVERTER
V –
V
System Power module 2
Fig. 3-1 System power module circuit (U+ is ON, V– is ON)
Inrush current
protection
relay
R003
Power relay
+
Coil
+
FUSE (25A)
+
0.35mH
+
+
W
V
U
A
V coil
U coil
DC
Compressor
motor
Fig. 3-1 shows the system power module and its peripheral circuit. (Current ACT module and power module are combined into one unit.)
The three transistors on the positive e side are called the upper arm, and the three transistors on the negative d side, the lower arm.
+
●
W coil
3. System Power Module Circuit
●
DC 260-360V is input to power module and power module switches power supply current according to
rotation position of magnet rotor. The switching order is as shown in Fig. 3-2.
[
]
At point E: U+ is ON, V– is ON (circuit in Fig. 3-1)
At point F: U+ is chopped (OFF), V– is ON (circuit in Fig. 3-4)
E
V+
F
W+
V+
U+
Upper arm
transistor
Lower arm
transistor
Time
U –
V –
T
W–
Fig. 3-2 Switching order of power module
●
Upper arm transistor is controlled to ON/OFF by 3.2kHz chopper signal. Rotation speed of the compress
is proportional to duty ratio (ON time/ ON time + OFF time) of this chopper signal.
●
Time T in Fig. 3-2 shows the switching period, and relation with rotation speed (N) of the compressor is
shown by formula below;
N = 60/2 X 1/T
●
Fig. 3-3 shows voltage/current waveform at each point shown in Figs. 3-1 and 3-4. First half of upper arm
is chopper, second half is ON, and first half of lower arm is chopper, second half is ON.
+
-
U transistor chopped
Voltage point
U transistor ON
A
260V-360V
Chopping period
T
Chopping period
Upper arm transistor
Current at
ON
B
Fig. 3-3 Voltage waveform at each point
●
When power is supplied U+ [ U–, because of that U+ is chopped, current flows as shown below; B
(1) When U+ transistor is ON: U+ transistor [ U coil [ V coil [ V– transistor [ DC current detection
(2)
resistor [ Point B (Fig. 3-1)
When U+ transistor is OFF: (by inductance of motor coil) U coil [ V coil [ V– transistor [ Return
diode [ Point A (Fig. 3-4)
– 77 –
System power module
260V-360V
U+
V+
DC compressor
motor
U coil
A
W+
U
V
W
U–
B
V–
V coil
W–
W coil
DC current (Id)
detection resistor
Fig. 3-4 System power module circuit (U+ is ON, V– is ON)
●
Since current flows at point B only when U+ transistor is ON, the current waveform at point B becomes
intermittent waveform as shown in Fig. 3-3. Since current at point B is approximately proportional to the
input current of the air conditioner, input current is controlled by using DC current (Id) detection resistor.
<Reference>
If power module is detective, self diagnosis lamps on the control P.W.B. may indicate as shown below:
SPM2
Table 3-1
Smoothing capacitor
(C501, C502, C503)
Self-diagnosis
GRN3
GRN1
Power P.W.B
Reactor
Diode Stack
(D25 VB60)
Switching Power P.W.B
(For Indoor P.W.B.)
Control P.W.B
Service-switch
Self-diagnosis lamp
and mode
lp (peak current cut)
LD301
Blinks 2
times
Abnormal low speed
rotation
LD301
Blinks 3
times
Switching incomplete
LD301
Blinks 4
times
Terminal
Board (2p)
Self-disgnosis lamps
(From left: LD301, LD302, LD303, LD304)
❈ From results of power module simple inspection (inspection mode when operated with compressor lead
disconnected), LD310 blinks four times about 2 seconds later: Unit has not entered the normal operation.
– 78 –
4. Power Circuit for P.W.B.
●
Fig. 4-1 shows the power circuit for P.W.B.
17V
Switching transformer
R717 D713
16
C718
R712
17
Diode stack
R005
18
C714
C707
19
R010
CO20
R702 R701
115V
R718 D710
1
R703
D709
R714
5V
12V
C735
P.EG1
D705
FB1
R716
D715
OV
-5V
20
11
R722
C716
C734
21
D707
R724
22
C733
C740
R713
C722
C723
D716
5
R715
R723 D706
15
C710
C731
1
2
R708
12
D703
D702
4
C721
C709
14
IC1
3
C708
C822
C732
R710
4
1
C725
R726
D708
3
2
PQB
C724
R711
1
2
REG2
R011
CO21
13
9
3
R725
Fig. 4-1 Power circuit for P.W.B.
●
In the power circuit for P.W.B., power voltage for microcomputer, peripheral circuits, and system power
module drive and, as well as DC35V, are produced by switching power circuit.
●
Switching power circuit performs voltage conversion effectively by switching transistor IC1 to convert
DC330V voltage to high frequency of about 20kHz to 200kHz.
●
Transistor IC1 operates as follows:
(1) Shifting from OFF to ON
●
DC about 330V is applied from smoothing capacitors C020 Œ andC021 œ in the control power circuit. With
this power, current flows to pin
of IC1 via R701 and R702 and IC1 starts to tum ON. Since voltage in
the direction of arrow generates at pin
of Switching Transforwer at the same time, current passing
through R708 and D702 is positive-fed back to IC1.
4
@
– 79 –
(2) During ON
● The drain current at IC1 increases linearly. During this period, the gate voltage and current become
constant because of the saturation characteristics of the transformer.
(3) Shifting from ON to OFF
● This circuit applies a negative feedback signal from the 12V output. When the voltage across C708
reaches the specified value, REG2 turns on and current flows to PQ8 1-2. This turns the secondary
circuits on, sets IC1 pin 1 to “Hi”, and turns IC1 off.
(4) During OFF
● While IC1 is on, the following energy charges the primary windings of the transformer:
Energy=LI2/2. Here, L : Primary inductance
I : Current when IC1 is off
This energy discharges to the secondary windings during power off. That is, C707-C710, C718 is charged
according to the turn ratio of each winding.
● At the start, an overcurrent flows to IC1 because of the charged current at C707-C710, C718.
● The drain current at IC1 generates a voltage across R716. If it exceeds the IC1 base voltage, it sets the
IC gate voltage to “HI”.
● R716 limits the gate voltage to prevent excessive collector current from flowing to IC1.
● This SW power circuit uses a frequency as low as 20kHz, especially at a low load (when both the indoor
and outdoor units stop): This reduces power loss in standby status.
<Reference>
If the power circuit for P.W.B. seems to be faulty:
(1) Make sure that 5V, 12V, 15V, 17V and -5V on the control P.W.B. power voltage are the specified values.
(2) When only the 5V output is low:
REG 1 (regulator) faulty, 5V-0V shorted, output is too high, or REG 1 is abnormal.
(3) When 12V and 5V are abnormal:
The following defects can be considered:
1 Fan, operation, power, rush prevention relay (shorting in relay, etc.)
2 REG 1 (regulator is abnormal), etc.
Shorting on primary circuits.
When shorting occurs in the secondary circuits, there is no abnormality in the primary circuits because
of overcurrent protection.
The voltage rises when an opening occurs in the primary circuits, or the feedback system is abnormal.
(4) When 15V/17V power supply is abnormal:
D710, D713 or drive circuit is abnormal.
(5) When all voltage are abnormal:
IC1, R716, may possibly be defective. Also D cable may possibly be reverse connected.
❈ If IC1 is abnormal, be aware that other components, such as the power module, REG (regulator), etc.
are possibly defective.
[When the switching power supply seems to be abnormal, the voltage between IC1 pin 4 (to be measured
at the leads of R202 and R201) and IC1 pin 5 (to be measured at R216 lead) may be between 11 and 16V.
This is because the protection circuit of IC1 is operating.]
– 80 –
5. Reversing valve control circuit
35V
12V
Reversing
valve
CN2
3
D831
PQ831
1
Q831
R832
Micro
Computer
R833
24
DC voltmeter
or tester
R831
V
IC8
0V
Fig. 5 1
●
By reversing valve control circuit you can switch reversing valve ON/OFF (Heating ON) according to instruction
from indoor microcomputer and depending on operation condition.
Voltage at each point in each operation condition is approximately as shown below when measured by tester.
(When collector voltage of Q831 is measured)
Table 5-1
Operation condition
Cooling
Heating
Dehumidifying
Collector voltage of Q831
General operation of Cooling
About 35V
In normal heating operation
About 0.8V
MAX. rotation speed instructed
by indoor microcomputer after
defrost is completed
About 0.8V
Defrosting
About 35V
Sensor dry
About 35V
– 81 –
6. Rotor magnetic pole position detection circuit
Inverter
+
+
DC brushless motor
for compressor
R502
+
R501
59
OV
R601
+
C205
R602
+5V
+12V
R604
R603
3
C
18
19
1
C605
20
U
R504
R503
B
A
7
6
R606
2
+
5
4
E
R607
13
+ 11
R611
10
C607
OV
V
R505
R605
+
D
OV
C606
OV
W
14
+
R610
R609
R608
9
8
12
IC3
C604
C603
C602
C601
Microcomputer of outdoor unit
R253
R500
OV
OV
Fig. 6-1 Rotor magnetic pole position detection circuit
When the DC brushless motor is rotated, it also operates as power generator, generating reverse electromotive
force according to number of rotations. This reverse electromotive force is voltage-divided by R503-R505 and
R604-R011, and appears as point A voltage. IC3 compares and digitalizes point A voltage with point B voltage
(in which DC voltage (Vd) is voltage-divided by R501, R502 and R608), and inputs this to microcomputer as
position detection signals for points C, D and E. Microcomputer switches inverter using optimum timing based
on position detection signals, in order to control the rotation of the brushless motor.
– 82 –
7. Peripheral circuits of microcomputer
●
Fig. 7-1 shows the microcomputer and its peripheral circuits.
Table 7-1, the basic operations of each circuit block and Fig. 7-2, the system configuration.
12V
R291
C223
R293
Q208
R294
C224
Outdoor
Microcomputer
(AX-6L02)
Q209
48 RESET
0V
C222
R295
SPM
terminal
R290
R292
ZD201
+5V
0V
0V 0V
DC current
Detection
resistor
12V
R24
+
–
+
–
8
5 +
6 –
9 IP cutter
4
R249
0V
0V
Is
IC4
7
R247
C220
5V
R245
0V
SPM
terminal
R248
60 Id
5V
C281
0V
D205
D104 R110
R108
0V
R278 R222
61 Is
+
– C105
R221
C221
0V
0V
Fig. 7-1 Peripheral circuit of microcomputer (AX-6M00)
Table 7-1
Basic operation
Circuit block
Peak current
cut off circuit
This circuit detects DC current flowing to power module: When over-current
(instantaneous value) flows, it stops upper and lower arm drive circuits and also
produces lp signal to stop microcomputer.
Overload external
judgment circuit
This circuit detects DC current flowing to power module and produces signal to
notify microcomputer of overload status.
Voltage amplifier
circuit
This circuit voltage-amplifies DC cuccrent level detected by detection resistor and
sends it to microcomputer. In addition, setting of internal/external overload
judgment is performed.
Reset circuit
This circuit produces reset voltage.
– 83 –
5V
Trip signal
synthesis circuit
Reset Voltage
Reset circuit
Overload external
judgement circuit
DC330V
or 360V
DC
Current
level
Current amplified
circuit
Outdoor microcomputer
Chopper
signal
Chopper
signal
Drive
signal
Drive
Circuit
Compressor
motor
Inverter
section
IP signal
Peak current
cut off circuit
AX-6M00
Detection
resistor
DC current
Fig. 7-2
●
The following gives details of operation for each circuit:
7-1. Peak current cut off circuit
Fig.7-3 shows peak current cut off circuit and waveforms at each point.
SPM
Negative —
Terminal
Control P.W.B.
B
HIC
DC current Id
CN14
DC current
27A
20
R42
IC1
A
8
F
R41
9
2
9
IP cutter
Outdoor
microcomputer
9 OC
Voltage at point A
C43
R43
1.35V
0V
Detection
resistor
9
0V
R24
Voltage at point B
0V
Fig.7-3
●
●
Ip cut circuit detects instantaneous surge current and stops inverter to protect components such as SPM.
As shown in diagram, when current exceeding 24A flows, voltage at point A detected by detection
resistor is input to pin 9 of INV-HIC, and voltage divided by R41 and R43 is input to pin 9 of IC1. Since
this voltage exceeds threshold of IC1, LO is output from pin 8 (voltage at point B). When LO is input
to pin
of microcomputer, microcomputer stops drive output.
When drive output of microcomputer stops, all drive outputs are set to HI, and IC1 of HIC is initialized
to enter drive signal waiting status. Microcomputer again outputs drive signal 3 minutes later to re-start
operation.
9
●
– 84 –
8. Overload control circuit (OVL control)
●
●
●
Overload control decelerates speed of compressor reducing load when the load to protect compressor,
electronics parts and power breaker, when operation enters overload status due to increase of load for
room temperature adjustment.
To judge overload, DC current and set value are compared.
Fig. 8-1 shows the overload control system configuration and Fig. 8-2 shows characteristic diagram of
overload judgement values. There are two judgements. One is external judgment: External set value and
DC current value are compared for judgment regardless of rotation speed. The other is internal judgment:
set value varying according to rotation speed programmed in microcomputer is compared with DC current
value for judgment.
AX-6M00 microcomputer
To
pin of
power module
(E2PROM built-in)
OVL judgment
to external set
value
Motor control
process
Detection
resistor
Voltage amplifier
circuit
A/D
converter
OVL judgment
according to
rotation speed
A/D
converter
Data selection
according to rotation
speed/DC voltage
(Internal judgement)
DC voltage
Rotation speed data
DC current
OVL start current data
DC current
Fig. 8-1 Overload Control System Configuration
Judgement value according to the rotation speed
(internal judgement value)
Rotation speed
Fig. 8-2
(1) Overload external judgement circuit
●
●
5
Voltage generated from current flowing in shunt R is balanced by R245 and C220 and input to pin
of
IC4. Then voltage-amplified value is input to pin
of microcomputer to compare with internal data of
EEPROM. When values correspond, microcomputer enters overload control.
Fig. 8-4 shows the rotation speed control. When value at pin
of microcomputer exceeds set value,
rotation speed of compressor decelerates to reduce load regardless of rotation speed commanded from
indoor unit.
:
:
– 85 –
Detection resister
(330V or 360V)
DC current
R500
59 Vd
R245
R253
C205
Microcomputer
(AX-6M00)
5V
36
C220
0V
IC4
+
–
6
5
R247
Is
–
+
0V
D204
60 Id
7
R249
5V
0V
D205
D104
C103
0V
R278 R222
R110
61 Is
+
– C105
R108
0V
R221
C221
0V
0V
0V
HIC
Fig. 8-3
Voltage at point 60
of microcomputer
Commanded rotation speed
Rotation speed
of compressor
Actual rotation speed
Deceleration
Acceleration
Deceleration
Acceleration
Fig. 8-4
(2) Voltage amplifier circuit
● Voltage amplifier circuit voltage-amplified DC current level detected by converting to voltage using detection
resistor and sends this to microcomputer. Microcomputer A/D-converts it and then compares with internal
data to judge over-load control.
[During overload control]
● Voltage generated from DC current flowing to detection resistor is balanced by resisitor R245 and C220,
then input to pin
of IC4. IC4 composes non-inverting amplifies, combined with peripheral components.
● As shown in Fig. 8-5, a value varying according to rotation speed is programmed in microcomputer: When
DC current value exceeds this set value, overload control is set. Control of compressor motor is the same
as that in external judgment.
● Set value is determined by amplification rate of voltage amplifier circuit programmed by software.
Amplification rate: High [ DC current : Low
Amplification rate: Low [ DC current: High
5
– 86 –
●
R500 and R253 detect DC current in current circuit. Microcomputer compensates for overload set value
so that the following is obtained:
DC voltage: High → DC current: Low
DC voltage: Low → DC current: High
(Since load level is expressed by DC voltage x DC current, this is intended to perform the same load
judgment even when voltage varies.)
{
Amplification rate : low
DC voltage : low
DC current : high
DC current
Amplification rate : x 7.3
DC voltage : 230V
Amplification rate : high
DC voltage : high
DC current : low
0
0
Rotation speed
Fig. 8-5
[When starting current control]
● It is necessary to keep starting current (DC current) fixed to ensure smooth starting of DC motor for
compressor.
● For RAM-50CNHZ2, starting current control is performed by software.
● Starting current will change reflect to change in power voltage. The control system deals with change in
voltage as shown below.
(1) As shown in Fig. 8-6, U+ and V- transistors on power module are turned on to apply current to winding
of motor.
(2) As shown in Fig. 8-7, ON time of W+ transistor changes according to DC voltage level so that starting
current is about 10A.
System power module
DC current
U+
V+
Compressor motor
W+
U
V
W
DC 360V
U—
V—
W—
Detection
resistor
Fig. 8-6
DC current (A)
W transistor
ON-time
Chopper duty: large
DC voltage: low
DC voltage: 360V
DC voltage: high
DC current (starting current)
10.0
Set value
7.5
5.0
2.5
Time
Start
Fig. 8-7
– 87 –
9. Reset Circuit
+5V
0V
R290
Micro
computer
AX-6M00
R291
C223
R293
Q208
Q209
48 RES
C222
R295
C224
R294
R292 ZD201
12V
0V
0V 0V
Fig. 9-1
●
●
●
●
Voltage when power is turned OFF
Voltage when power is turned ON
●
Reset circuit performs initial setting of microcomputer program when power is turned on.
Microcomputer resets program with reset voltage set to Lo, to enable operation at Hi level.
Fig. 9-1 shows the reset circuit, and Fig. 9-2 shows waveforms at each point when power is turned on/
off.
After power is turned on, 12V line and 5V line voltages rise: When 12V line voltage reaches 7.2V (Zener
voltage of ZD201), ZD201 turns ON and Q208 and Q209 turn on, and reset voltage becomes Hi. Reset
voltage is not set to Hi until VDD of microcomputer rises to 5V, enabling operation, due to ZD201.
After power turns off, when 12V line voltage drops, ZD201 also turns OFF. However, Q208 is left ON since
reset voltage is fed back by R294, until 12V line drops to about 7.6V. This prevents chattering of reset
voltage due to voltage chnge in 12V line.
12V line
12
5V line
6
Reset voltage
0
Time
12V line
12
6
5V line
Reset voltage
0
Time
Fig. 9-2
– 88 –
10. Temperature Detection Circuit
HIC
+5V
O.H. thermistor
Normal: 2.7V or less
OH: 2.7V or more
R304 Return: 2.3V or less
62 O.H.
CN5
C301
R301
+5V
0V
DEF thermistor
0V
Normal: 2.4V or more
OH: 2.4V or less
R305 Return: 2.9V or more
CN6
63 DEF.
C302
R302
Outdoor temperature +5V
thermistor
Microcomputer
(AX-6M00)
0V
0V
R306
Refer to Table 10-1
64 Outdoor
CN7
C303
R303
temperature
0V
0V
Fig. 10-1
Compressor head surface temperature is detected by OH thermistor circuit, defrost operation temperature
is detected by DEF thermistor circuit, and outdoor temperature is detected by outdoor temperature thermistor
circuit.
● Thermistor is a negative resistance element with the following characteristic: Resistance falls when
temperature rises, and increases when temperature falls.
● When compressor is over-heated, resistance of OH thermistor decreases and voltage at pin
of
microcomputer rises.
● Voltage at pin
of microcomputer is compared with set value stored inside: If voltage exceeds set value,
microcomputer judges over-heating and stops operation.
● If outdoor heat exchanger is frosted, heat exchanger temperature will rapidly drop. In response, resistance
of DEF thermistor increases and voltage at pin
of microcomputer falls. When the voltage flls under the
set value, microcomputr enters defrost control mode.
● During defrost operation, microcomputer transfers indoor unit defrost condition command from IF transmision
output at SDO pin of interface (pin
and
of microcomputer).
● Outdoor temperature is always read in (voltage at pin
of microcomputer) by outdoor temperature
thermistor, and then transferred to indoor unit side. According to this value, compressor rotation speed
control and operation selection (outdoor fan ON/OFF, etc.) in dehumidifying mode are performed.
Represented values of the relationship between outdoor temperature and voltage are shown below.
●
x
x
c
/
X
v
Table 10-1
Outdoor temperature (°C)
Voltage at pin
-10
1 of CN7 (V)
(Reference)
0
10
20
30
40
1.19 1.69 2.23 2.75 3.22 3.62
x v
When thermistor is open or heat is shut off, pins
to
of microcomputer are set to about 0 V; when
thermistor is short-circuited, pins
to
of microcomputer are set to about 5V, and LD301 blinks 7 times.
However, OH thermistor detects only short-circuit as error: It will enter a blink mode after 12 minutes or more
has elapsed from the start of compressor operation.
x v
– 89 –
●
A
IP CUTTER
Id CONTROL CIRCUIT
GRY
B
B
B
COMPRESSOR MOTOR
Fig. 11-1 shows the drive circuit.
The circuits for U phase, V phase and W
phase have the same Configuration.
AX-6M00
MICRO COMPUTER
PWB (MAIN)
Fig11-2, 0 to 5V chopper signal is output from microcomputer for each phase. The signal output from microcomputer is input to IC, inverted
due to active LO, and 0 to 15V chopper signal is obtained. This signal is then applied to transistor gate of each phase to drive.
11.Drive circuit
Fig. 11-1
– 90 –
120°
+
120°
+
Drive signal at point A
W
U
U + 5V
0V
V+
W+
U
V
W
U + 15V
0V
V+
Drive signal at point B
120°
W+
U
V
W
Fig. 11-2
– 91 –
120°
+
W
V
U
V
120°
+
U
V
V
W
+
12. Electric expansion valve
12V
12V
5V
R208
C225
CN15, 16
16
R209
9
1
8
Microcomputer
IC6, 7
6
2
3
39 Valve A
5
15
14
40 Valve B
4
7
6
41 Valve A
10
11
42 Valve B
3
2
4
1
Electric expansion valve 1
5 12 13
OV
Fig. 12-1
●
●
●
The electric expansion valve is driven by DC 12V. Power is supplied to 1 or 2 phase winding to switch
magnetic pole of winding in order to control opening degree.
Relationship between power switching direction of phase and open/close direction is shown below.
When power is supplied, voltages at pins
to
of CN 15 and CN 16 are about 0.9V; they are about 12V
when no power is supplied. When power is reset, initialization is performed for 10 or 20 seconds.
During initialization, measure all voltages at pins
to
of CN15 and CN16 using tester. If there is any pin
with voltage that has not changed from around 0.9V or 12V, expansion valve or microcomputer is defective.
Fig 12-2 shows logic waveform when expansion valve is operating.
4 1
4 1
Table 12-1
Pin Lear
phase No. wire
Drive status
1
2
3
4
5
6
7
8
OFF
OFF
OFF
OFF
ON
ON
OFF
OFF
OFF
OFF
4
White
ON
ON
OFF
3
Yellow OFF
ON
ON
2
Orange OFF
OFF
OFF
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
6
3
8
1
1
Blue
OFF
Operation mode
1 2 3 4 5
8 7 6 5 4
7
2
VALVE CLOSE
VALVE OPEN
12V
Pin No. 42, 38
0.9V
41, 37
40, 36
39, 35
50ms
75ms
200ms
Fig. 12-2
With explosion valve control, opening degree is adjusted to stabilize target temperature, by detecting temperature
of compressor head.
The period of control is about once per 20 seconds, and output a few pulses.
– 92 –
Outdoor DC Fan Motor control circuit
DC330~360V
METAL COVER
PWB (POWER)
SPM2
RC FILTER
2
3
4
5
6
7
0V
Vcc
PWM control
voltage
FG Pulse
VSP
ONE CHIP DRIVER IC
MOTOR COIL
1
BOARD
PWB (MAIN)
FAN LIMITER
MICROCOMPUTER
AX-6M00
FAN CHOP
FM 60˚el
●
●
●
●
●
●
●
●
●
●
●
This model uses DC Fan Motor which is including controller circuit into the Motor shell.
This DC Fan Motor will rotate by control voltage apply to Vsp input. (Voltage range: 1.7 to 7V DC)
Vsp high : Faster ; Vsp low : slower ; Vsp lower than 1.7V : stop
Motor will output FG pulse by following this motor revolution.
Outdoor Microprocessor will output PWM control signal from FAN CHOP terminal by following the instruction
from indoor Microprocessor.
This PWM control signal will convert to Vsp voltage by smoothing circuit (Q101 & RC filter)
Fan motor will start to rotate when Vsp was proceeding over than 1.7V, and generate FG pulse by rotation
speed.
FG pulse will feed back to Outdoor Microprocessor through PQ102.
PQ102 is the isolator between Microprocessor circuit and DC Fan Motor circuit, which has to match the Fan
Motor revolution with instructed revolution. Such as...
FG feedback: Faster – Instruction: Slower ... Decrease pulse width
FG feedback: Slower – Instruction: Faster ... Increase pulse width
FG pulse is also used for Fan Motor fail detection
Microprocessor will monitor FG pulse 30 seconds after start the fan motor. If there is no signal detected, it
will consider that the Fan Motor was malfunction and stop the operation. In this case, LD301 on control PWB
will blink 12 times. (Fan Motor lock detected)
R107 and IC4 are used for Fan Motor over current detection.
– 93 –
<Reference>
● When stop operation with LD301 blinks 12 times, it may be a DC Fan Motor broken.
● In this case, please check CN30 and CN31 connection first. It makes Fan Motor Lock also it those
connectors are in misconnection.
● If 2A Fuse was burned it is possible that the DC Fan Motor may be damaged too.
● DC Fan Motor has broken when 2A Fuse was burned. Please replase both DC Fan Motor and 2A Fuse
together.
● Fan lock detecting system may be actidiated when something has disturb the Fan rotation by inserting
materials into propeller fan or ice has growing inside of outdoor unit by snowing.
● Fan lock detecting system may be actidiated by strong wind (ex. 17m/sec or above) against the Fan
rotation. In this case, unit will be restart again after a while.
● Fan lock detecting system may be actidiated even though the DC Fan Motor is rotating correctly, the
possible casue is due to Motor problem or PQ102 on board or control board problem.
<Caution>
● Please take precaution while servicing Fan Motor circuit, because it carries DC330~360V supply.
● It is impossible to troubleshoot the Fan Motor bacause its circuit is integrated and conceal in the Fan
Motor.
– 94 –
– 95 –
How is self-diagnosis lamp
(LD301) lighting?
Operate outdoor unit
according to instructions on
“How to operate outdoor unit
independently”.
Yes
Is the 5V supplied between
Pin 4 (test pin) and pin 5
(5V) of CN18?
Yes
Is power circuit normal?
Refer to item of power circuit
for details.
Is 25A fuse normal?
Yes
Is 220-240V supplied to L,N
terminal?
No
No
No
Refer to lighting mode of selfdiagnosis lamps.
Is switching power circuit OK?
Is 3A fuse normal?
No
If fuse is blown, other parts may be
affected. Take care.
(Mainly, varistor 2, diode stack,
smoothing capacitor, and system
power module.)
[Air conditioner not operated/not operated correctly]
Yes
(
)
If 3A fuse is blown, switching
transformer, could be
defective.
Replace defective components.
Check to see whether the
connected cord D cable correctly?
If reversed, correct the cable
connection.
Replace defective components.
TROUBLE SHOOTING
CHECKING THE OUTDOOR UNIT ELECTRICAL PARTS
MODEL RAM-50CNHZ2
– 96 –
No
LD304 blinks once.
Communication error.
Yes
Yes
Contact terminal
Coil terminal
Interface relay
Is DC voltage of about 35V
being output to C, D terminals?
(DC33v~38.5V is output
normally.)
Check interface curcuit.
No
Is voltage (10V or more) being
generated between contact
terminals of interface relay?
Yes
Is DC 12V being applied to both
ends of control side (coil terminals)
of interface relay?
Yes
Yes
No
No
C,D
(Inddor 2)
C,D (Inddor 1)
Which is
broken, C,D (Indoor 1) Or C,D
(Indoor 2)
Is voltage of about 35V being output
to both ends of R713?
No
Repalce interface relay.
There may be defective parts between
12V output of switching power supply on
control P.W.B. and interface relay. (Also
be care of solder-touch, etc.)
D707 and C710 could be defective.
Switching power circuit for indoor 2
P.W.B. could be defective.
– 97 –
No
Thermistor abnormal.
LD301 blinks 7 times.
No
Acceleration error
LD301 blinks 8 times.
Yes
Yes
Is thermistor circuit normal?
Yes
Is continuity of thermistor normal?
No
❈ Be careful not to forget to connect
it after servicing is completed.
Is thermistor connected correctly?
Is drive circuit normal?
Yes
Is system power module (SPM2)
normal?
No
No
Yes
No
No
Replace thermistor circuit
parts.
Replace thermistor.
Connect thermistor.
Replace defective parts.
Replace system power
module. (SPM2)
Looking at P.W.B. diagram and
circuit diagram, perform continuity
check of pattern and lead wire.
Looking at P.W.B. diagram and
circuit diagram, perform continuity
check of pattern and lead wire.
– 98 –
Abnormal low speed.
LD301 blinks 3 times.
No
LD301 blinks 4 times.
Switching Failure.
No
Over-load lower limit cut.
LD301 blinks 5 times.
No
OH thermistor temperature
rises.
LD301 blinks 6 times.
Yes
Yes
Yes
Is drive circuit normal?
Yes
Is system power module
normal? (SPM2)
Replace main P.W.B.
Yes
Is system power module
(SPM2) normal?
Is thermistor circuit normal?
No
No
No
Replace defective parts.
Replace system power
module. (SPM2)
Replace system power
module? (SPM2)
Replace thermistor circuit
parts.
Looking at P.W.B. diagram and
circuit diagram, perform continuity
check of pattern and lead wire.
– 99 –
(
)
Yes
However, reset stop is always
displayed immediately after power is
turned on, so this is not abnormal.
LD301 blinks once.
Reset stop.
No
Peak current cut.
LD301 blinks twice.
Is reset circuit normal?
Is drive circuit normal?
Yes
Is system power module
normal? (SPM2)
Try operation again.
Is operation normal?
Replace defective parts.
Replace defective parts.
Replace system power
module. (SPM2)
Perform final check of operation.
No
No
No
Check again to see that all
connectors are connected
securely.
PAM circuit
Phenomenon 1 (Rotation speed does not increase)
Is DC voltage 330V or more
present across + , tab of
SPM2?
No
Check cords connected to
system power module again.
If any cord is disconnected,
connect correctly.
Check diode stack.
Yes
Is OVL lamp lighting?
Where OVL lamp lights,
this indicates over-load
and is not abnormal.
If phenomenon persists,
replace system power module.
Over-voltage error (blinks 15 times): System power module (SPM2) is abnormal.
– 100 –
OPERATION USING SERVICE SWITCH OF OUTDOOR UNIT
RAM-50CNHZ2
1. Turn OFF power switch, then turn ON again.
2. Remove electrical parts box lid.
3. Press service switch for 1 second or more. (waiting at least 20 seconds after power switch is turned on.)
At this time, LD303 (red) lights and unit operates in forced cooling mode.
Never operate
continuously for 5
minutes or more
Service switch (Forced-cooling
operation starts by pressing for
1 second or more, and pressing
for 1 second or more again
stops operation.)
Open upper lid.
Electrical parts
box lid.
(Note)
(1) When checking is performed using service switch of outdoor unit, if both indoor units are not connected to interface signal
(DC35V) C.D terminals. LD304 (outdoor communication error indicator) will display communication error by blinking once.
(2) If operating is performed with compressor connector disconnected, LD301 will blink 4 times and operation will not start.
After operation using service switch is completed, turn the power switch OFF and then ON again.
HOW TO OPERATE OUTDOOR UNIT INDEPENDENTLY
1. Connect pipe to high pressure and low pressure side service valves.
Large diameter side
service valve
Universal un
For outdoor
(1/4 inch and 3/8 inch )
unit
Parts to be prepared
Outdoor unit
Connect large diameter and
small diameter side service
values of outdoor unit using
universal union and copper pipe
as shown on the right.
Compesser
Reversing
valve
( Close)
For indoor unit
(1) Universal union
1/4 inch (6.35mm diameter)
3/8 inch (9.52mm diameter)
(2) Copper pipe (1/4 inch and 3/8 inch)
(3) Lead wire for shorting
Two wires of about 10 cm long with
alligator clip or IC clip
Copper pipe
Apply vacuum and then
charge refrigerant of 300g.
(1/4 inch )
Small diameter side
service valve
( Close)
Never operate continuously for 5
minutes or more.
Operation method is the same as that for operation using service switch of outdoor unit described above. However, interface
signal communication error (no input at C, D terminals) will be displayed when operation is complete.
– 101 –
TROUBLE SHOOTING
MODEL RAM-50CNHZ2
PRECAUTIONS FOR CHECKING
System power module
Power source
1ø220V-240V, 50Hz
L
–
DANGER
–
–
1. Remenber that the
0V line is biased to
155-170V in
reference to the
ground level.
2. Also note that it takes
about 10 minutes
until the voltage fall
after the power switch
is turned off.
ACT-MODULE
+
+
+
+
–
–
–
Power module
a
N
M
Compressor motor
b (0V)
Indoor unit
electric parts
C
Control
P.W.B.
D
DC35V
MAIN P.W.B.
0V
Across a – b (0V line).................... approx 360V
Across a – ground............................. approx 155-170V
Across b
Outdoor unit P.W.B.
DANGER
(0V line)– ground.............. approx 155-170V
Always keep your hands
and metallic things away
from the enclosure of the
oscilloscope.
Oscilloscope
When using an
oscilloscope, never
ground it. Don't forget
that high voltages as
noted above may
apply to the
oscilloscope.
– 102 –
DANGER!
Don’t install
the ground
line.
DISCHARGE PROCEDURE AND HOW TO CUT OFF POWER TO POWER CIRCUIT
RAM-50CNHZ2
WARNING
Caution:
●
Voltage of about 360V is charged at both ends of smoothing capacitors 400 µF x 3.
●
High voltage (DC 360V) is also charged at screw and terminal sactions of system power module.
●
During continuity check for each circuit of electrical parts in outdoor unit is performed, to prevent
secondary trouble, disconnect red/gray wire connected to system power module (SPM2) from diode
stack. (Also be sure to perform discharging of smoothing capacitor.)
1. Turn off the power switch of indoor unit or disconnect power plug.
2. Wait for 10 minutes or more after power is turned off and then remove electrical parts box lid. As shown below,
Apply soldering iron of 30~75W for 15 seconds or more to P1 and N1 black/white lead receptacles on system
power module to discharge voltage from smoothing capacitor.
Do not loosen or remove screws of system power module: If screw is loose, voltage will not be discharged.
3. Before operation check of ech part of circuit, remove receptable of red/gray lead connected to system power
module from diode stack.
SMOOTHING CAPACITOR
N1
Do not use soldering iron with
transformer: Doing so will blow
thermal fuse inside transformer.
V
W
P1
L1
As shown left, apply soldering iron to metal
parts (receptacles) in sleeve corresponding
to P1 and N1 terminals of system power
module (SPM2).
L2
SPM (SYSTEM POWER MODULE)
No. 2
Soldering iron
No. 3
No. 4
No. 5
Screws of system power module (SPM2) are live parts: Do not
touch them. Screw tightening torque and method are strictly
specified.
When the screw is loosened or removed once, be sure to tighten
according to the procedure shown on the right, with tightening
torque of 0.8± 0.2 N · m.
Smoothing capacitor
(C501, C502, C503)
No. 1
No. 7
SPM2
GRN3
GRN1
Power P.W.B
Reactor
Control P.W.B
Diode Stack
(D25 VB60)
Switching Power P.W.B
(For Indoor P.W.B.)
Service-switch
– 103 –
Terminal
Board (2p)
No. 6
RAM-50CNHZ2
1. Outdoor unit does not operate (remote control signal can be received)
In hot weather, set operation mode to cooling,
room temperature to 16°C; in cold weather, set
to heating mode and 32°C, and then press
operation button.
Remove outdoor unit cover and
electrical parts box lid, and check
LD301 self-diagnosis lamp.
Check room temperature thermistor.
If defective, replace it.
[Normal values]
10°C ➞ approx. 20kΩ
25°C ➞ approx. 10kΩ
30°C ➞ approx. 8kΩ
Yes
Check heat exchanger thermistor.
If defective,replace it.
[Normal values]
10°C ➞ approx. 20kΩ
25°C ➞ approx. 10kΩ
30°C ➞ approx. 8kΩ
Service Switch
LD301
Does LD301 blink once?
❈ Repeating to light for 0.25 sec.
and go off for 2 sec.
Is indoor/outdoor communication
signal superimposed on DC35V?
38kHz
About
35V
No
Yes
Does LD304 in electric parts
box blink once when only one
indoor unit is connected?
Transmission waveform
of about 2Vp-p
0V
No
Check electrical parts of outdoor
unit and repair defective parts.
(Around outdoor interface
transmitting circuit).
During check using tester:
If superimposed, 35V rapidly
changes.
Caution:
Digital tester only.
Yes
Is indoor transmission signal
generated at Q803 collector?
38kHz
No
About
4V
Transmission waveform
of about 2Vp-p
No
Check indoor interface
transmitting circuit.
0V
During check using tester:
If generated, voltage rapidly
changes between 4V and 0V.
Yes
Check electrical parts of outdoor
unit and repair defective parts.
(Around outdoor interface
transmitting circuit).
Check electrical parts of outdoor
unit and repair defective parts.
Does LD303 go off a few
seconds to ten and few seconds
after it is lit?
Perform final operation check.
– 104 –
Reactor
SPM2
Diode Stack
(D25 VB60)
Smoothing capacitor
(C501, C502, C503)
Switching Power P.W.B
(For Indoor P.W.B.)
GRN3
– 105 –
Control P.W.B
Service-switch
GRN1
Power P.W.B
Terminal
Board (2p)
LIGHTING MODE SELF-DIAGNOSIS LAMP
RAM-50CNHZ2
1 Location of self-diagnosis lamp
2 Lighting mode self-diagnosis lamp
RAM-50CNHZ2
WAIT FOR TENMINUTE(MIN) AFTER
TURNING OFF THE
POWER SWITCH WHEN
SERVICE WORK IS
BEING DONE.
SHOULD BE CONFIRM
TO VOLTAGE LESS
THAN DC 10V
AT MEASURING
POSITION.
DO NOT TOUCH SCREW
OF SYSTEM POWER
MODULE DUE TO HIGH
VOLTAGE.
DO NOT TOUCH OTHER
PARTS AT THE CASE
OF PUSHING SERVICE
SWTCH.
SERVICE
OPERATION
REFRIGERANT WITHDRAWAL OR SINGLE
OPERATION OF THE OUTDOOR UNIT,
SHALL SWITCH OFF THE EXCLUSIVE
BREAKER FIRST.
PUT THE SWITCH TO ON POSITION
BACK AND WAIT AT LEAST 1 MINUTE.
THEN PUSH THE SERVICE SWITCH
WHICH IS ON THE CIRCUIT BOARD
FOR MORE THAN 1 SECOND.
(THERE WILL BE A COOLING CYCLE)
TO PRESERVE PARTS FROM DAMAGE,
MUST NOT OPERATE IT FOR MORE
THAN 5 MINUTES.
TO PAUSE, PUSH THE SERVICE SWITCH
AT LEAST 1 SECOND. IN CASE TO
START OPERATING ONCE AGAIN
PLEASE SWITCH OFF THE POWER BACK.
M A I N P.W.B .
SELF-DIAGNOSIS LIGHTING MODE
L
D
3
0
1
L
D
3
0
2
SELF-DIAGNOSIS NAME
RED RED
[1]DURING OPERATION LD303(RED)LIGHTS.
NORMAL
OPERATION
OVERLOAD
(1)
OVERLOAD
(2)
OVERLOAD
(3)
LD302
LD303
LD304
SERVICE
SWITCH
COMPRESSOR
OPERATION
(1)
(2)
NOT MALFUNCTION
SET
VALUE
(3)
THE ROTATION SPEED IS
AUTOMATICALLY CONTROLLED TO PROTECT THE
COMPRESSOR IN THE
OVERLOAD CONDITION.
LD303(RED)GOES OFF.
INDOOR THERMOSTAT OFF.
MAIN OPERATION OFF.
NORMAL
STOP
WHEN STOPPED WITH
POWER RESET.
(NORMAL WHEN POWER
HAS BEEN TURNED ON.)
RESET
1TIMES STOP
THIS SHOWS AN
OVERLOAD,
NOT MALFUNCTION.
TIME
[2]DURING STOP
NOT MALFUNCTION.
P.W.B.s (POWER CIRCUIT,
MICROCOMPUTER, ETC.)
PEAK CURRENT OVERCURRENT
IS DETECTED.
2TIMES CUT
1
ABNORMAL POSITION DETECTION
LOW SPEED SIGNAL IS NOT INPUT
3TIMES ROTATION DURING OPERATION.
1
SWITCHING
4TIMES FAILURE
2
SWITCHING FROM LOW
FREQUENCY SYNC START
TO POSITION DETECTION
OPERATION FAILURE.
UNDER THE LOWER LIMIT
OF ROTATION SPEED
WITH OVERLOAD CONTROL
CIRCUIT OPERATED.
2
1
2
SYSTEM POWER MODULE
COMPRESSOR 3 P.W.B.s
SYSTEM POWER MODULE
COMPRESSOR 3 P.W.B.s
SYSTEM POWER MODULE
COMPRESSOR 3 P.W.B.s
OH THERMISTOR OH THERMISTOR
OPERATED.
6TIMES TEMP.RISE
1
OUTDOOR UNIT IS EXPOSED TO DIRECT
SUNLIGHT OR ITS AIRFLOW BLOCKED.
FAN MOTOR 3 FAN MOTOR CIRCUIT
THE VOLTAGE IS EXTREMELY LOW.
LEAK OF REFRIGERANT 2 COMPRESSOR
3
OH THERMISTOR CIRCUIT
4
FAN MOTOR
THERMISTOR THERMISTOR IS OPEN OR
SHORTED.
7TIMES ABNORMAL
1
ACCELERATION NO ACCELERATION OVER
THE LOWER LIMIT OF
8TIMES DEFECTIVE
THE ROTATION SPEED.
1
POWER VOLTAGE
ABNORMAL
IS ABNORMALLY LOW.
POWER
VOLTAGE
10TIMES
1
OVERLOAD
5TIMES LOWER LIMIT CUT
OUTDOOR FAN RPM IS
NOT ROTATE AS INTENDED
RPM
FAN LOCK
12TIMES ERROR
EEPROM
LD301
:BLINKING :OFF
:LIT
DETAILS MAIN CHECK POINT
ROTATION
SPEED
DANGER
(DC360V)
13TIMES READ ERROR
MICROCOMPUTER CANNOT
READ THE DATA IN EEPROM.
1
2
4
5
FAN MOTOR CIRCUIT
THERMISTOR 2 CONNECTION
OF THERMISTOR DEFECTIVE
3 THERMISTOR CIRCUIT
2
2
1
2
LEAK OF REFRIGERANT
COMPRESSOR
POWER VOLTAGE
CONNECTION OF REACTOR
FAN MOTOR
FAN MOTOR CIRCUIT
P.W.B.s (POWER CIRCUIT,
EEPROM. ETC.)
SYSTEM POWER MODULE
ACTIVE CONVERTER OVERVOLTAGE IS
DETECTED BY
14TIMES DEFECTIVE
SYSTEM POWER MODULE
L
NORMAL
D
3
0
COMMUNICATIONS BETWEEN 1 CABLE IS WRONG CONNECTED
3 INTERFACE
COMMUNICA- INDOOR UNIT AND OUTDOOR 2 CABLE IS OPEN
4
CIRCUIT BETWEEN INDOOR
UNIT AND OUTDOOR UNIT
GRN 1TIME TIONS ERROR UNIT ARE INTERRUPTED
EXAMPLE OF
BLINKING (5 TIMES)
– 106 –
2SEC
(
)
LIGHTS FOR 0.25
SEC AT INTERVAL
OF 0.25 SEC.
TROUBLESHOOTING OF THE SYSTEM POWER MODULE
Collector
BASE
Element circuit
Emitter
+
Circuit diagram
of the module
PGU
PGV
PGW
U
V
W
NGV
NGW
NGU
—
P1
N1
P2
U
Terminal symbol of
system module
See next page
for values
measured by
tester
L2L1
+
—
Do not disassemble the system power module when troubleshooting is performed.
– 107 –
HOW TO CHECK POWER MODULE
Checking power module using tester
Set tester to resistance range (X 100)
If indicator does not swing in the following conductivity check, the power module is normal.
(In case of digital tester, since built-in battery is set in reverse direction, + and – terminals are reversed.)
CAUTION
If inner circuit of power module is disconnected (open), the indicator of tester will not swing and this may assumed as
normal. In this case, if indicator swings when + and – terminals are connected in reverse of diagram below Fig. 2, it
is normal. Furthermore, compare how indicator swings at U, V and W phases. If indicator swings the same way at each
point, it is normal.
–
+
–
–
P1
N1
L2L1
+
+
U
W
+
–
+
P2
–
+
+
P1
N1
L2L1
V
Fig. 1
+
P2
–
W
Fig. 2
– 108 –
U
–
–
V
CHECKING THE REFRIGERATING CYCLE
(JUDGING BETWEEN GAS LEAKAGE AND
COMPRESSOR DEFECTIVE)
1. Troubleshooting procedure (No operation, No heating, No cooling)
Lighting mode
Connect U,V,W phase leads to the
power module again and operate the
air conditioner.
Blinks Blinks Blinks Blinks Blinks Blinks
2 times 3 times 4 times 5 times 6 times 8times
Selfdiagnosis lamp
LD301
Time until the
lamp lights
Possible
malfunctioning
part
Is the self-diagnosis lamp mode as
shown on the right?
Approx. Within
Approx.
Approx. 10
10
seconds 30
seconds
seconds
Approx. 10 seconds
Compressor
Blinking
Gas
leakage
Compressor
off
YES
Normal
(0.39-0.98 MPaG)
(4-10 kg/cm2G)
Stop to operate and check the gas
pressure in balancing mode.
Gas leaking
(less than 4kg/cm2G)
(less than 0.39 MPaG)
When the
self-diagnosis lamp
lights in the same
condition as above.
Gas leaks.
Repair and seal refrigerant.
The compressor is defective. Replace it
and seal refrigerant.
If the compressor checker for an
inverter type air conditioner is
available, re-check using it.
(
Perform a final check of operation.
– 109 –
)
PARTS LIST AND DIAGRAM
MODEL RAS-20CNHZ2
9
11
62
10
2
17
8
18
61
88
20
13
12
1
6
5
14
4
63
15
16
3
7
60
– 110 –
MODEL
NO.
RAS-20CNHZ2
PART N0.
RAS-20CNHZ2
Q’TY / UNIT
PARTS NAME
1
PMRAS-20CNH2
004
1
CABINET
2
PMRAS-25CNH2
002
1
LOW-COVER
3
PMRAS-25CNH2
003
1
20W MOTOR
4
PMRAS-25CNH2
004
1
TANGENTIAL FLOW FAN
5
PMRAS-25CNH2
005
1
P-BEA ASSEMBLY
6
PMRAS-25CNH2
006
1
BEARING COVER
7
PMRAS-25CNH2
007
1
FAN MOTOR SUPPORT
8
PMRAS-25CNH2
008
1
ELECTRICAL COVER
9
PMRAS-20CNHZ2 002
1
DRAIN PAN ASSEMBLY
10
PMRAS-07C1
013
1
DRAIN HOSE
11
PMRAS-20CNHZ2 003
1
FRONT COVER ASS’Y
12
PMRAS-25CNH2
012
1
MOUNTING PLATE
13
PMRAS-40CNH2
021
1
REMOTE CONTROL
14
PMRAS-25CNH2
014
3
EVAPORATOR
15
PMRAS-10C6M
006
3
UNION (2)
16
PMRAS-09CHA1R 005
1
UNION (3)
17
PMRAS-10C6M
001
1
STEP MOTOR
60
PMRAS-10C3M
003
1
REMOTE CONTROL HOLDER
61
PMRAS-25CNH2
018
1
FILTER
62
PMRAS-25CNH2
019
2
CAP
63
PMRAS-25CNH2
020
1
PIPE SUPPORT
18
PMRAS-07C1
006
1
TERMINAL BOARD (2P)
20
PMRAS-20CNHZ2 001
1
P.W.B. (MAIN)
22
PMRAS-25CNH2
1
THERMISTOR
024
– 111 –
MODEL RAS-30CNHZ2
11
19
61
62
23
8
61
18
12
1
13
6
63
5
4
2
7
3
14
15
35
16
12
10
9
17
60
– 112 –
MODEL
RAS-30CNHZ2
PART N0.
RAS-30CNHZ2
Q’TY / UNIT
1
PMRAS-30CNHZ2 006
1
CABINET
2
PMRAS-32CNH2
002
1
LOW-COVER
3
PMRAS-13C6M
001
1
20W MOTOR
4
PMRAS-09C1
003
1
TANGENTIAL FLOW FAN
5
PMRAS-05C
013
1
P-BEA ASSEMBLY
6
PMRAS-32CNH2
004
1
BEARING COVER
7
PMRAS-32CNH2
005
1
FAN MOTOR SUPPORT
8
PMRAS-30CNHZ2 002
1
ELECTRICAL COVER
9
PMRAS-30CNHZ2 003
1
DRAIN PAN ASSEMBLY
10
PMRAS-07C1
013
1
DRAIN HOSE
11
PMRAS-30CNHZ2 004
1
FRONT COVER ASS’Y
12
PMRAS-05C
009
1
MOUNTING PLATE
13
PMRAS-40CNH2
021
1
REMOTE CONTROL
14
PMRAS-30CNHZ2 005
1
EVAPORATOR
15
PMRAS-13C6K
003
1
UNION (2)
16
PMRAS-5142C
006
1
UNION (4)
17
PMRAS-05C
041
1
STEP MOTOR
18
PMRAS-07C1
006
1
TERMINAL (2P)
19
PMRAS-30CNHZ2 001
1
PWB (MAIN)
23
PMRAS-32CNH2
009
1
INDICATION BOARD
35
PMRAS-25CNH2
024
1
THERMISTOR
60
PMRAS-10C3M
003
1
REMOTE CONTROL HOLDER
61
PMRAS-32CNH2
015
2
FILTER
62
PMRAS-25CNH2
019
2
CAP
63
PMRAS-32CNH2
006
1
PIPE SUPPORT
NO.
– 113 –
PARTS NAME
MODEL RAM-50CNHZ2
30
23
29
36
20
16
19
21
18
17
37
38
40
34
41
31
28
22
5
26
35
13
27
11
24
7
12
10
6
15
14
3
2
32
4
33
1
9
8
9
– 114 –
MODEL
RAM-50CNHZ2
PART N0.
RAM-50CNHZ2
Q’TY / UNIT
1
PMRAM-50CNHZ2 902
1
BASE
2
PMRAM-50CNHZ2 901
1
COMPRESSOR
3
KPNT1
001
4
PUSH NUT
4
RAC-2226HV
805
3
COMPRESSOR RUBBER
5
PMRAM-50CNHZ2 911
1
CONDENSER
6
PMRAC-128JHT
905
1
REVERSING VALVE
7
PMRAM-50CNHZ2 903
2
ELECTRICAL EXPANSION VALVE
8
PMRAM-50CNHZ2 913
2
VALVE (2S)
9
PMRAC-30CVP1
903
2
VALVE (3S)
10
PMRAC-40CNH2
914
1
THERMISTOR (OH)
11
PMRAC-25CNH2
909
1
THERMISTOR (OH) SUPPORT
12
RA-226
015
1
OVERLOAD RELAY COVER
13
RA-226
016
1
COVER SUPPORT
14
PMRAM-50CNHZ2 910
1
THERMISTOR (DEFROST)
15
PMRAC-32CNH2
905
1
MG-COIL
16
PMRAC-40CNH2
908
1
REACTOR
17
PMRAM-50CNHZ2 904
1
P.W.B (MAIN)
18
PMRAM-50CNHZ2 905
1
FUSE (3A)
19
PMRAC-40CNH2
906
1
FUSE (2A)
20
PMRAC-40CNH2
901
1
SYSTEM POWER MODULE
21
PMRAC-40CNH2
902
1
DIODE STACK (D25VB60)
22
PMRAS-07C1
006
2
TERMINAL BOARD (2P)
23
PMRAC-40CNH2
916
1
THERMISTOR (OUTSIDE TEMPERATURE)
24
PMRAC-40CNH2
917
1
PROPELLER FAN
26
PMRAC-40CNH2
918
1
SUPPORT (FAN MOTOR)
27
PMRAM-50CNHZ2 912
1
FAN MOTOR (40W)
28
PMRAC-40CNH2
904
1
CABINET
29
PMRAC-40CNH2
921
1
NET
30
PMRAC-40CNH2
922
1
TOP COVER
31
PMRAM-50CNHZ2 906
1
SIDE PLATE R
32
PMRAM-50CNHZ2 914
1
STRAINER
33
PMRAM-50CNHZ2 915
1
STRAINER
34
PMRAC-40CNH2
926
1
SIDE PLATE-L
35
PMRAC-40CNH2
928
1
GRILL
36
PMRAC-40CNH2
920
1
MOUTH RING
37
PMRAC-40CNH2
905
1
FUSE (25A)
38
PMRAM-50CNHZ2 907
1
PWB (POWER)
39
PMRAM-50CNHZ2 908
1
TERMINAL BOARD (2P)
40
PMRAM-50CNHZ2 909
1
P.W.B. (SW-POWER)
41
RA-108CHLXA
3
VARISTOR (450NR)
NO.
908
– 115 –
PARTS NAME