Download RAC-08EW-E

FILE NO. A00-9607
SERVICE MANUAL
ROOM AIR-CONDITIONER
PORTABLE TYPE
RAC-08EW-E
PRINTED IN JAPAN Mar., 1996 S
CONTENTS
1. SPECIFICATIONS .............................................................................................................. 3
2. SPECIFICATIONS OF ACCESSORIES ............................................................................. 3
3. APPEARANCE ................................................................................................................... 4
4. SPECIFICATIONS OF ELECTRICAL PARTS .................................................................... 4
5. WIRING DIAGRAM (RAC-08EW-E) .................................................................................. 5
6. COOLING CHARACTER CHART ...................................................................................... 6
7. REFRIGERATING CYCLE DIAGRAM.............................................................................. 7
8. MICROCOMPUTER BLOCK DIAGRAM ............................................................................ 8
9. OPERATION DESCRIPTIONS ........................................................................................... 9
9-1.
Operation Control Knobs on Control Panel ........................................................................................ 9
10. OUTLINE OF OPERATIONS.......................................................................................... 10
10-1.
10-2.
10-3.
10-4.
Basic Operation ................................................................................................................................ 10
Economy Mode ................................................................................................................................ 10
Dry Mode .......................................................................................................................................... 11
Economy Operation .......................................................................................................................... 11
11. TROUBLESHOOTING CHART ...................................................................................... 12
11-1. What to be Prechecked First ............................................................................................................ 12
11-2. How to Judge Faulty Parts by Symptoms ........................................................................................ 13
11-3. PC Board Layout .............................................................................................................................. 22
12. INSTALLATION INSTRUCTION ..................................................................................... 24
12-1.
12-2.
12-3.
12-4.
12-5.
Installation Method ...........................................................................................................................
Routine Maintenance .......................................................................................................................
Water Supply ....................................................................................................................................
Changing of Water ...........................................................................................................................
Relocation of Air Conditioner ............................................................................................................
24
24
24
25
25
13. CLEANING METHOD OF CONDENSER ....................................................................... 26
13-1. Condenser Servicing Procedures ..................................................................................................... 26
14. EXPLODED VIEWS AND PARTS LIST .......................................................................... 27
Note:
A special tool is required to remove the back cabinet.
(In EXPLODED VIEWS AND PARTS LIST, Location No. 256 “Screw Driver”)
– 2 –
1. SPECIFICATIONS
Model
Item
Dimensions
Height
mm
720
Width
mm
500
Depth
mm
315
kg
35
Frequency
Hz
50
Rated voltage
V
1 phase, 220/230/240
Cooling capacity
kW
Airflow, high
m3 /h
390/400/410
Moisture removal
lit/h
1.2
Running current
A
3.82/3.80/3.85
Power consumption
W
780/800/840
Net weight
Power source
Standard
performance
Electrical
characteristics
Compressor
RAC-08EW-E
2.10/2.18/2.18
Power factor
93/92/91
Model, output
PH94X1-4G1, 750W
Ripple tube type, Forced air ventilation
Condenser
Finned tube type, Aircooled ventilation
Evaporator
Finned tube type, Aircooled ventilation
Safety devices
Float switch, Over current relay
Fan motor (for indoor and exhaust)
20W, Induction motor
Refrigerant
R-22, (Charged quantity, 0.47 kg)
Air filter
Polypropylene net filter
Power cord
3-core (One core for grounding),
1.9 m (6.4 ft) length with plug
Accessories
Exhaust hose, Caster seat, Exhaust hole,
Cap for exhaust hole
Specifications are subject to change without notice.
2. SPECIFICATIONS OF ACCESSORIES
Item
Remarks
Q'ty
Exhaust hose
1
Caster seat
4
Exhaust hole
3
Cap for exhaust hole
3
1.4m
Caster seat
– 3 –
Exhaust hole
Cap for exhaust hole
315mm
(12.4 in)
3. APPEARANCE
Economy switch
Wind direction
control grille
(horizontal)
Sub cabinet
Air filter
500mm (19.7 in)
Operation switch
(ON/OFF)
Air inlet
Back cabinet
Control panel
Handle
Connector of
exhaust hose
Air outlet
720mm
Wind direction
control grille
(Vertical)
Water tank
Holder of
power cord
Case of hose
Front door
39mm
(1.5 in)
Caster
420mm (16.5 in)
(1.8 in)
45.5mm
Power cord
(220/240V)
285mm
(11.2 in)
(28.3 in)
Front panel
230mm
(9.1in)
1.9m (6.4ft)
Drain hose
120mm
(4.7 in)
Fig. 3-1
4. SPECIFICATIONS OF ELECTRICAL PARTS
Parts name
Type
Specifications
Single phase, 50 Hz, 220/230/240V ~, AC. 750W output
Compressor
PH94X1-4G1
Winding resistance
(Ω) (at 20°C)
Red-Black
White-Black
Red-White
4.55
8.55
13.1
Single phase, 50 Hz, 230V, AC. 20W output
Fan motor
STF-230-20-4C
EARU40M206UF
Running capacitors
Relay
Winding resistance
(Ω) (at 20°C)
Red-Black
205.0
Black-Orange Orange-Blue
145.9
400V, 20µF (for compressor)
EEP2H105HWNB05 500V, 1µF (for fan motor)
AJE6412
250V, 3A (for fan motor)
PC12D2
250V, 15A (for compressor)
Float switch
FS-085-002F
Transformer
FT67-2
Rated current, 0.1A 100V DC
Primary 220V ~ 240V, Secondary 12.3V ~ 13.6V
Microcomputer
TMP47C440AN
Room temperature sensor
(Ta-sensor)
(Microcomputer)
Differential ±2°C, Adjustable range 17 ~ 28°C
Heat-exchanger sensor
(Tc-sensor)
(Microcomputer)
Differential ±2°C
Copper wire minimum 1.0 mm2
Power supply cord with plug
Fuse
111.1
TSCR
6.3A
– 4 –
Black-Orange
102.5
5. WIRING DIAGRAM (RAC-08EW-E)
THERMO SENSOR
(ROOM TEMPERATURE)
HEAT
EXCHANGER
SENSOR
FLOAT
SWITCH
1 2
1 2
CN02
1 2
1 2
CN04
1 2
1 2
CN05
CONTROL
PC BOARD
CN01
1 2 3
1 2 3
WHI
CN06
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
9 9
10 10
11 11
12 12
13 13
14 14
RED
TRANSFORMER
BLU
BLU
CN08
CN07
C35
VARISTOR
OPERATION
PANEL
PC BOARD
R26
VARISTOR
SURGE
ABSORBER
DSA
CR03
RY01
RY02
RY03
F01
FUSE
6.3A
SINGLE
50Hz
220/230/240V~
BLU
RUNNING
CAPACITOR
GRN&YEL
BRW
4
2
CR01
BLK
3
1
RY07
RELAY
CR02
1 2 3 4 5 6
1 2 3 4 5 6
CN03
RED
GRY
RUNNING
BLU
CAPACITOR COMPRESSOR
ORN
BLK
WHI
WHI
FAN MOTOR
RED
RED
BLK
Fig. 5-1
– 5 –
Color Identification
GRY
BRW
WHI
BLK
RED
BLU
GRN &YEL
:
:
:
:
:
:
:
ORN
:
GRAY
BROWN
WHITE
BLACK
RED
BLUE
GREEN &
YELLOW
ORANGE
6. COOLING CHARACTER CHART
Cooling Capacity
kW
2.7
2.6
2.5
2.4
2.3
2.2
Humidity
2.1
2.0
70%
1.9
60%
1.8
50%
40%
1.7
32
31
30
29
28
27
26
25
24
23
Ambient temperature
Fig. 6-1
– 6 –
22
21
20
19
18
17 C
7. REFRIGERATING CYCLE DIAGRAM
RAC-08EW-E
Delivery tube
I.D : 4.8 mm
O.D : 6.0 mm
Main condenser (Water)
Sub condenser (air)
T2
Capillary tube
I.D : 1.2 mm
O.D : 2.04 mm
Length : 400 mm
Compressor
Evaporator
T1
Suction tube
I.D : 6.8 mm
O.D : 8.0 mm
Fig. 7-1
RAC-08EW-E
Table 7-1
Conditions
Cooling
Surface temp. of heat exchanger
interchanging pipe (°C)
Ambient temp.
conditions DB/WB (°C)
T1
T2
Indoor
Outdoor
Standard
10
50
27/19
35/24
High temperature
17
57
32/23
43/26
Low temperature
5
34
21/15
21/15
Note:
Measure the heat exchanger temperature at the center of U-bend. (By means of thermistor thermometer.)
– 7 –
8. MICROCOMPUTER BLOCK DIAGRAM
Mode selector
(Cool/Dry/Fan only)
3-minute delay at Restart for
Clock frequency oscillator circuit
Initializing circuit
Functions
Operation indicator
compressor
Start-up Compensation for fan
Economy indicator
motor
Timer
Economy indicator
Processing
Warning indicator
(Temperature processing)
Timer selector (ON,
CONTINUE, OFF)
Timer setting
C.P.U.
Air flow selection
(Fan selector High,
Low, AUTO)
Fan motor signal
Compressor ON/OFF signal
DC 5 volt
DC 12 volt
AC input
Operation
(ON/OFF)
Relay driver
Transformer
Power relay
Economy selection
(ON/OFF)
Remote control unit
Power supply
circuit
AC 50Hz
220/230/
240V
Temperature setting
Miniature
relay
Room temperature sensor
(Ta sensor)
Heat-exchanger sensor
(Tc sensor)
Relay driver
Control unit
Compressor
Fan motor
A bold line denotes a 220/230/240V AC line.
Fig. 8-1
– 8 –
9. OPERATION DESCRIPTIONS
9-1. Operation Control Knobs on Control Panel
MODE knob
TIMER knob
Set to a desired time.
Use to select the operation mode
COOL, DRY, or FAN ONLY.
THERMO knob
FAN SPEED knob
The AUTO position automatically
changes the fan speed according to
room temperature.
During DRY and ECONOMY mode,
LOW is used regardless of the setting.
The scale gives just a rough mesure
of the temperature setting.
TIMER SELECT knob
Upon expiry of the number of hours
set using the TIMER knob, the
air conditioner starts operating if the
knob is set at ON or stops operating
if the knob is at OFF.
With the knob set at CONT., the air
conditioner continues operating
regardless of the TIMER setting.
FAN ONLY DRY:COOL
MODE
HIGH LOW:AUTO
18
20
22
24
26
28
C
2
4
6
8
10
12
Hr.
THERMO
FAN SPEED
OFF CONT. ON
TIMER
TIMER SELECT
RAC-08EW-E
WARNING
TIMER
ECONOMY
OPERATION
I/O
I/O button
Lamps
OPERATION
(green)
This lamp will light up during the
COOL, DRY, or FAN ONLY
operation. It begins flashing if a
power failure occurs.
ECONOMY
(green)
This lamp will light up when you
push the ECONOMY button.
TIMER
(yellow)
This lamp will light up when the
TIMER SELECT knob is set to ON or
OFF.
WARNING
(red)
ECONOMY
Push this button to start the air
conditioner, push it again to stop it.
ECONOMY button
This lamp will light up when the
water in the tank runs out. When
the tank is refilled, the lamp will go
off.
The red lamp flashes during abnormal
operation. To turn off the lamp, push
the ON/OFF button.
Waiting about five minutes, push the
button again, the OPERATION lamp
will light up and the air conditioner
will start operating.
Fig. 9-1
– 9 –
Push this button to start the
economy operation, push it again to
cancel the economy operation.
10. OUTLINE OF OPERATIONS
Room
temperature
+2 C
+1 C
Setting temp.
-1 C
(4) To adjust the room temperature, set the knob
mounted on the control panel at desired temperature. The room temperature sensor detects and
controls the adequate temperature.
(5) When the FAN SPEED selector switch is set to
“AUTO”, the volume of air is controlled to be felt
agreeable.
Zone E
(3) When the I/O button is pushed with the timer set
at any desired time, the relays are all disabled
and the air conditioner stops when the timer
reaches the set time. However, if the operation
is started with the timer set to “CONTINUE”, the
operation continues.
+3 C
Zone F
(2) When the I/O button is pushed again, the relays
are all disabled, and the air conditioner stops.
+4 C
Zone C
This control mode establishes some zones corresponding to different combinations of on and off intervals of the compressor and selects a suitable zone
depending on the lapse of time from the start of operation and the temperature.
Zone D
(1) When I/O button is pushed, the relays RY01,
RY02 or RY03 and power relay RY07 start according to the conditions set by FAN SPEED knob
selector switch. Thus, the indoor fan motor and
compressor are controlled. (Operations as described in this paragraph are all programmed. And
following items are same as it.)
Zone A
10-2.Economy Mode
Zone B
10-1.Basic Operation
1H
2H
3H
Monitoring
(when room temperature
is not higher than the
set temperature)
Time
Fig. 10-1
Table 10-1 During cooling
Lapse from
start
Zone
Compressor
A
ON OFF 18 – 4 minutes
B
ON OFF 3 – 4 minutes
C
ON OFF 5 – 7 minutes
D
ON OFF 3 – 7 minutes
E
ON OFF 5 – 10 minutes
F
ON OFF 3 – 10 minutes
0 to 1 hour
1 to 2 hours
2 hours ~
Table 10-2 During drying
Lapse from
start
Zone
Compressor
A
ON OFF 5 – 4 minutes
B
ON OFF 3 – 4 minutes
C
ON OFF 5 – 7 minutes
D
ON OFF 3 – 7 minutes
E
ON OFF 5 – 10 minutes
F
ON OFF 3 – 10 minutes
0 to 1 hour
1 to 2 hours
2 hours ~
– 10 –
10-3.Dry Mode
In this mode, a microcomputer control lowers humidity while maintaining a constant temperature. The
microcomputer turns the compressor on and off at
regular intervals (3 to 6 minutes on and/or off). During the halt, the airflow fan stops as well.
Compressor
6
minutes
a
The compressor and airflow fan will operate independent of the temperature control, though the pattern
of operation depends on the relation between room
temperature (TA) and set temperature (Ts), as shown
below:
b
Table 10-3
Stop
Airflow fan
Stop
Low
Low
Stop
Stop
Low
Stop
Stop
Low
Stop
Stop
Relation between
room temp. (TA) and
set temp. (TS)
OFF
period
a
ON
period
b
TA > T S + 2
4 min.
6 min.
TS + 2 > TA > TS
5 min.
5 min.
T S > TA
6 min.
3 min.
Room temperature (TA ) measurement timing
Time
The airflow fan will operate in the Low position, independent of the position of the airflow setting control.
Fig. 10-2
10-4-2. Dry Operation
10-4.Economy Operation
(1) When the economy button is pushed, the
economy lamp is lit and the economy operation
will start. (But this operation will not start in the
mode of fan only.)
(2) The economy operation with the cooling and dry
modes will be performed in the manner as stated
below.
(1) ON/OFF interval operation both of the compressor and fan will be performed (At the OFF time,
both of the compressor and fan will be set to
OFF.)
(2) Wind capacity is of L.
(3) An interval operation will be performed in Ta ≥ Ts
condition.
10-4-1. Cooling Operation
(1) The compressor will be operated by means of
ON/OFF interval operation.
(2) The room fan will be controlled as stated below:
• When compressor is turned on: L
10-4-3. Fan Operation
(1) When operation change over switch is set to fan
operation, the economy operation shall not be
executed. And the economy lamp shall not be lit
too. (Normal fan operation will be performed.)
• When compressor is turned off: UL
Ta
• When monitoring: OFF
(3) An interval operation will be started from OFF
time. But when starting operation, it will be kept
in ON position for 6 minutes.
+3
18 min ON
-4 min OFF
5 min ON
-7 min OFF
5 min ON
-10 min OFF
3 min ON
-4 min OFF
3 min ON
-7 min OFF
3 min ON
-10 min OFF
+2
+1
Ts
Monitoring (Compressor, OFF. Fan, OFF)
1
2
Fig. 10-3
– 11 –
Time
11. TROUBLESHOOTING CHART
Troubleshooting procedures:
•
Following the details of “What to be prechecked first”, make sure of the basic items.
•
When there is no trouble corresponding to above, check in detail the faulty parts following “How to judge
faulty parts by symptoms” later.
11-1. What to be Prechecked First
11-1-1. Power Voltage
The power voltage must be from AC 198V to 264V. If
the power voltage is not within this range, the air conditioner may not work normally.
11-1-2. Operations not Regarded as Failure
(Program Operation)
In terms of the control of air conditioner, the operations shown in Table 11-1 are made as a program
operation incorporated in a microcomputer. If a claim
is made about the operation, check it corresponds to
the contents in Table 11-1. If it does, it is an indispensable operation for the control and maintenance
of the air conditioner but not a failure of the units.
• Operations which are not deemed trouble
Table 11-1
Operation of air conditioner
Description
When the POWER plug socket of the unit is
inserted, the operation lamp on the control panel
flashes.
The operation lamp flashes indicating that power is turned on.
If this happens, push the I/O button once, and flash will stop.
Power failure also causes the same lamp to flash.
Room temperature is in the range under which the
compressor is turned on and the operation lamp is
lighting, but the compressor will not start.
The compressor will not start while the compressor restart
prevention timer (three-minute timer) is actuated. This applies
also when power is turned on.
Fan speed remains unchanged when the fan speed
knob is operated in the dry mode.
Fan speed is fixed at Low in the dry mode.
The indoor fan occasionally stops intermittently in
the dry mode.
In the dry mode, the fan operation is synchronized with the
compressor. As a result the fan is stopped when the compressor is stopped.
The compressor will not switch on or off even when
the Thermo control is operated in the dry mode.
In the dry mode, the compressor goes on and off at regular
intervals independent on the Thermo control.
Warning lamp is lit and no cold air comes out.
When water in the tank has been drained out, stop the
operation of the compressor for safety. Fill the water in the
tank.
Warning lamp blinks and no cold air comes out.
When the temperature in the freezing cycle (high pressure
side), stop the operation of the compressor for safety. Be sure
that the exhaust port has plugged with something or water is
not remain in the exhaust hose.
At the mode of fan only, the economy lamp is not lit
when the economy button is pushed.
In case of the fan only mode, the economy lamp will not be lit
since the economy control will not be performed.
The push button has not returned when the
economy button is pushed.
The economy button is of lock type. When the button is
pushed again, the button is set to OFF and the button will
come out. The operation button will come out all the time since
it is not of lock type.
– 12 –
11-2. How to Judge Faulty Parts by Symptoms
One of the most important matters for the repair of air conditioners is accurate trouble analysis.
For this purpose, it is required to make a correct judgement about the problem by asking the user.
11-2-1. Trouble Analysis Classification
a No power turns on.
1 Unit is inoperable.
Totally
inoperable
c All relays do not work.
2 Breaker or fuse blows out.
3 Only fan does not work.
Trouble
analysis
classification
At cooling and drying operations,the
compressor works,but the fan does not run.
4 Compressor does not operate.
(Fan is also inoperable.)
Lamp flashes.
Some parts are
inoperable.
5 Compressor does not operate.
6 Unit repeats ON/OFF frequently. Short cycles.
7 Cooling is not obtained or insufficient.
8 Drying is not obtained or insufficient.
Operable but
abnormal.
9 Water leaks.
10 Abnormal noise.
– 13 –
11-2-2. No Power Turns On (Air Conditioner Does Not Operate)
<Precheck>
(1) Is voltage to wall socket normal?
(3) Is water filled in the tank?
(2) Has cord plug fully sealed in the socket?
(4) Is timer set in timer mode? (Is timer select switch
set to ON?)
<Checking Procedures>
Turn power switch OFF, wait 5 seconds and turn
switch ON again.
Operations
Check items
NO
Major possible
causes
Does operation lamp on control panel flash?
YES
Remedies
NO
Item by
symptom
When the control panel "I/O" button
is turned ON, does power go on?
YES
(Normal)
NO
Is DC 12V (Q01 "E"),DC5V(Q02 "E") of voltage indicated
on rear of control PC BOARD ASS'Y normal?
YES
NO
Is the DC voltage between pin 2 of CN06 control panel
connector and GND 5V?
YES
Control PCB ass'y
is faulty.
Control panel
ass'y is faulty.
Replace
Replace
11-2-3. All Relays Do Not Work
<Checking Procedures>
Turn power ON.
Operations
Check items
Major possible
causes
Does operation lamp on control panel flash?
NO
See item "NO
power turns on"
YES
Remedies
Item by
symptom
Is 12VDC (Q02 "E") voltage indicated on rear of control
PCB normal?
YES
Control panel ass'y is faulty.
Replace
– 14 –
NO
Control PCB
ass'y is faulty.
11-2-4. Only Fan Does Not Work
<Precheck>
(1) Does fan rotate even in the cool mode and the fan only mode?
<Checking Procedures>
Turn power ON.
Operations
Check items
NO
Does operation on control panel flash?
See items "NO
power turns ON"
Major possible
causes
YES
Remedies
Do fan relays RY01,RY02 and RY03 change over?
NO
Item by
symptom
Points to which multimeter
probes are applied
Polarity
(+)
Q02"E"
(+ 12V)
Normal voltage value
Polarity
( )
Condition
Pin 2 of RY01
Pin 2 of RY02
Pin 2 of RY03
When each
relay is ON
DC12V
YES
Check power supply for Fan motor
NO
Relay is faulty.
Points to which multimeter
probes are applied (Connector CN03)
Note:
Check the relays with
the fan motor
Normal voltage value
Condition
RY01
(BLK)
M RY02
(ORN)
L RY03
(BLU)
Replace.
H
COM
(RED)
When each
relay is ON
AC220/230/240V
YES
MF capacitor
is faulty.
Replace MF
capacitor.
NO
Fan motor
is faulty.
Replace Fan
motor.
YES
Check Fan motor winding resistance
NO
Points to which multimeter
probes are applied .
Polarity
(+)
BLACK
Polarity
( )
RED
BLUE
WHITE
BLACK
ORANGE
BLUE
ORANGE
Condition
Disconnect
fan motor
lead wire
Nolmal resistance
value ( W )
49
47
32
32
– 15 –
11-2-5. Compressor Does Not Operate
<Precheck>
(1) Is room temperature control on the control panel higher than room temperature in the cool mode?
(2) Is the MODE selector knob on the control panel left set to “FAN ONLY”?
<Checking Procedures>
Turn power ON.
Operations
Check items
NO
Does operation lamp on remote controller flash?
See item "No power turns ON".
YES
Major possible
causes
Remedies
NO
Does operation lamp come on normally?
Item by
symptom
YES
NO
Does power relay RY07 change over?
Points to which multimeter
probes are applied
Polarity
(+)
Polarity
( )
Condition
Q02"E"
RY07 5
RY07 ON
Chack the voltafge of
connector CN02 1 - GND.
NO
DC Voltage between CN02
and GND
Normal voltage
value
10 C
20 C
30 C
1.4V
1.4V
1.4V
DC11V
YES
YES
Is AC220/230/240V present across 1 - 2 of
power relay RY07.
NO
See "All relays do not work".
YES
Compressor is
faulty.
Power relay
RY07 is faulty.
Replace
compressor.
Replace
power relay.
Room temperature
sensor is faulty.
Replace
power relay.
– 16 –
11-2-6. Compressor Does Not Operate
<Precheck>
(1) Is the target room temperature specified by the remote controller assembly higher than current room temperature, in the cool mode?
(2) Are the wiring and contacts of connecting cables in a satisfactory condition?
<Checking Procedure>
Is the voltage across terminals 1 and 2
220/230/240VAC? (Terminal RY07)
Check the power
relay, PCB assembly.
NO
Operations
Check items
YES
Major possible
causes
NO
Can the running sound of the
compressor be heard?
Remedies
YES
Item by
symptom
Isn't the starter condenser faulty?
NO
YES
Measure the current.
If 3 or 4 times the
rated current
continues for several
seconds, it means the
compressor is faulty.
Compressor is faulty.
Measure the
continuity of the
compressor.
If disconnected, the
compressor is faulty.
Specitications
Single phase, 50Hz, 220/240VAC. 750W output
Winding resistance
(W ) (at 68 F)
Red-Black
4.55
– 17 –
White-Black
8.55
Protection
Red-White
13.1
I.O.L. Type
11-2-7. The Unit Repeats ON/OFF Operation Frequently
Operations
Check items
Major possible
causes
NO
Does the compressor repeat ON/OFF
opertion?
Remedies
YES
Item by
symptom
Measure the running
current.
Over current
Normal
Measure the gas
temperature.
High
Does the fan motor repeat
ON/OFF operation?
Normal
In case the gas temp. and
the running current are high.
90 C ~ 105 C
(discharge)
Heat exchange of the
condenser is faulty.
Setting of the
thermostat is faulty.
Correct it.
Condenser (water)
Condenser (air)
– 18 –
Control PCB ass'y is
faulty.
Normal operation
11-2-8. Operable But Abnormal
(A) No or insufficient cooling/drying
Operations
Check items
Can the following temperature difference between
(Cooling : 14 to 18 F)
inlet and outlet air be obtained?
(Drying : 23 to 27 F)
Major possible
causes
NO
Remedies
YES
Is the filter blocked?
YES
Item by
symptom
Clean the filter.
NO
No
Not blocked.
Is the fan speed at "HIGH"?
NO
Set it to "HIGH".
YES
Insufficient refrigerant gas?
Gas leak?
Explain the running
conditions again using
the instruction manual.
Ple
a
the se c
win lose
do
w
Isn't the cooling load excessive?
– 19 –
In case of insufficient
gas, replenishment is
according to the gas
replenish procedure.
(B) Water Leaks
Installation condition of the air
conditioner is defective.
Normal
Dew condensation on the
external body.
Water stays here.
Causes:
(1) There is a moisture generating source in the room.
•
Note that, even if a ventilation fan is not in
operation, if it is open to the outside, the condition is same as the one in operation.
(3) Window has been kept open while raining, and
after that, cooling operation is started.
•
On rainy days, relative humidity may become
as high as 90% or higher. If doors or windows
are open to the outside, close them.
(2) Air volume is remarkably reduced.
•
Air filter is blocked, resulting in the reduction
of air volume.
•
Low fan operation causes the lowering of running voltage, resulting in the reduction of air
volume.
•
If the voltage is in the range of 198 – 264V, it
is normal.
(4) When a man goes in and out between a room
with high humidity and one with low humidity. Or,
in case there is no door between such rooms.
– 20 –
•
Even if there is no moisture generating source
in the room where the air conditioner is installed, in case people go in from and out to a
room with high humidity frequently, or in case
there is no door between the rooms, the situation becomes the same.
(C) Abnormal Noise
[ Symptom ]
Intermittent noise as if something is fluttering in the wind.
Air blows in and out at the air discharge port.
Obstacle
Check if there is an obstacle which hinders the air flow to
any extent.
No
Check whether the air filter is dirty or not.
Clean
Evaporator
Check whether the evaporator is dirty with dust or oil or not.
– 21 –
11-3. PC Board Layout
Top view
– 22 –
Bottom view
– 23 –
12. INSTALLATION INSTRUCTION
Read the installation manual carefully before installing the air conditioner.
4) If the exhaust hose is set with its tip down,
the water condensed within the hose might
leak out of the room. It is therefore recommended to set the hose with its tip kept higher
than the air outlet of the air conditioner properly.
The following items in table 12-1 are included as the
accessories.
Table 12-1
Parts name
Q’ty
Owner’s manual
1
Installation manual
1
Exhaust hole
3
Exhaust hose
1
Caster seat
4
Cap (for exhaust hole)
3
(2) Put a seat under each caster.
(3) Electrical wiring.
Table 12-2
12-1.Installation Method
Model
Power
source
Plug
socket
rating
Fuse
rating
RAC-08EW-E
1φ 50 Hz,
220/230/240V
7A
7A
12-2.Routine Maintenance
(1) Insert the connection port (round) into the air conditioner surely to its root.
1) The exhaust hose may be extended or contracted from approx. 500 mm to approx. 1,400
mm, but use it in its shortest length if possible.
2) Be careful that a U-shaped bend or slack is
not yielded in the way of exhaust hose.
3) When you move the air conditioner, be sure
to pull out the exhaust hose and don’t lay down
the air conditioner.
(1) Be sure to observe the following for a longer service life of your air conditioner.
• Cleaning of air filter: Once every two weeks
• Changing of water in tank: Once ever week
(2) Be sure to drain out the water in tank during every off season.
12-3.Water Supply
(1) The water in tank decreases gradually in the
course of cooling operation.
(2) If the water is run out, the warning lamp lights up
(in red) and the operation mode is switched to
blowing. Then, refill the water.
(3) Open the front door, being down the tank toward
you, and lift off the tank.
Water stays
here.
Tank
Fig. 12-2
Fig. 12-1
– 24 –
12-4.Changing of Water
12-5.Relocation of Air Conditioner
(1) As the water in tank becomes dirty gradually in
cooling water, change the water once every week.
(1) When you move the air conditioner, be sure to
drain out the water in tank first, and do not lay
down the air conditioner.
Drain hose
Fig. 12-3
(2) The water in tank becomes 50° or so in cooling
operation. It is abnormal at all.
– 25 –
13. CLEANING METHOD OF CONDENSER
13-1.Condenser Servicing Procedures
(1) Pull out the air filter.
(2) Remove six screws at the back and take off the
rear panel. Also, pull out the drain hose from
case of hose.
(5) Remove two screws fastening the condenser
cover (one in the front part and another in the
rear).
Condenser cover
Fig. 13-3
Fig. 13-1
(3) Open the front door and remove the tank.
(4) Remove the inner cover (screwed down at five
spots).
Inner cover
(6) Remove the condenser cover by pulling it obliquely upward, then the condenser will be exposed.
(7) When assembling, follow the reverse procedures.
Tank
Condenser cover
Fig. 13-4
Fig. 13-2
– 26 –
14. EXPLODED VIEWS AND PARTS LIST
246
204
205
"Special tool"
206
242
256
201
251
255
203
202
209
253
208
236
207
212
210
237
211
238
Location
No.
Part
No.
201
202
203
204
205
206
207
208
209
210
211
43000679
43008399
43003190
43000680
43080332
43019800
43000678
43007917
43007916
43079225
43079226
Description
Front Panel
Door, Control-Panel
Cabinet, Back
Cabinet
Air-Filter
Handle
Door, Front
Magnet Catch
Cover, Hinge
Tank, Water
Cap, Water-Tank
– 27 –
Location
No.
Part
No.
212
236
237
238
242
246
251
253
255
256
43079081
43089126
43089127
43089128
43088645
43069760
43068437
43009439
43097200
43082263
Description
Cap, Water-Tank
Exhaust-Hose
Cap, Exhaust Hole
Exhaust Hole
Owner’s Manual
Cord Band
Control Panel
H-Louver
Tamper-Proof-Screw
Screw Driver
(Tamper-Proof-Screw)
401
402
403
406
404
405
Location
No.
401
402
403
404
405
406
407
408
409
Part
No.
Location
No.
Description
410
411
412
413
414
415
416
417
43058255 Transformer, FT67-2
43055420 Capacitor, Electrolytic
43060064 Cord, Power
43050341 Thermo-Sensor
43050340 Sensor, Heat Exchanger
43068439 PC Board Assembly
43031090 Diode-Block
43034070 Relay-Miniature, JE-X
43033197 Capacitor, Electrolytic
– 28 –
Part
No.
Description
43055359 Toshiba Nonlinear Resistor
43035573 Surge Absorber
43031043 TR, 2SD880Y
43034036 Relay, Power
43060899 Fuse
43055462 Capacitor, EEP Series
43055284 Toshiba Nonlinear Resistor
43055508 Capacitor, CK
408
C29
C22
IC01
C25
C21
C03
R03
C36
C27
R68
R65
R66
R67
C28
C26
D03
+5V
R05
C24
R51
R04
R50
C01
R90
C07
E C B
6
R85
Q03
R84
RY07
C34
R83
D20
DB01
C20
E
C
B
Q07
R11
C23
R26
MCC 702
04
COMPONENT SIDE
SG01
CR02
411
401
402
403
404
405
406
407
408
35
X01
+5V
Part
No.
R92
R93
10
R94
R95
C32
7
21
R63
R60
R59
R58
15
R57
R61
R71
R22
R21
R20
R70
R72
R64
D01
C02
R01
30
R52
D07
Location
No.
C31 C30
R82
4
P12
(RED)
3
CN01
25
R80
R81
P11
(BLK)
C35
CN07
TC
C35
R69
D02
C04
C
E
Q01
B
CR03
R25
R62
22
R74
R76
R76
J02
E
F01
P10
412
E C B
1
J01
2
R73
C
CR01
CN08
1
42
6.3A 250V~
414
CN05(RED)
15
D05
C50
P05
CN06
Q02
D06
RY03
1
2
C08
GND
R02
RY02
CN04(WHI)
1
TA
C
E
Q02
B R10
C06
415
B
C05
E
E
C
B
Q06
B
C
CN03
CN02 2 1
R09
Q05
D04
P06
R08
Q04
RY01
3
5
413
407
Description
GCMK C1X
R
409
Location
No.
43058255 Transformer, FT67-2
43055420 Capacitor, Electrolytic
43060064 Cord, Power
43050341 Thermo-Sensor
43050340 Sensor, Heat Exchanger
43068439 PC Board Assembly
43031090 Diode-Block
43034070 Relay-Miniature, JE-X
409
410
411
412
413
414
415
– 29 –
Part
No.
Description
43033197 Capacitor, Electrolytic
43055359 Toshiba Nonlinear Resistor
43035573 Surge Absorber
43031043 TR, 2SD880Y
43034036 Relay, Power
43060899 Fuse
43055462 Capacitor EEP Series
213
215
217
216
235
220
Drain hose
221
218
219
214
250
254
222
247
223
226 228
225
227
224
Location
No.
Part
No.
213
214
215
216
217
218
219
220
221
222
223
224
43022394
43022395
43022396
43022397
43020249
43072327
43022392
43022393
43020250
43020251
43049666
43072326
230
229
Description
Casing, Up
Casing, Low
Case, Fan, Up
Case, Fan, Low
Fan, Multi-Blade
Drain-Pan
Case, Fan, Exhaust
Cover, Fan, Exhaust
Fan, Multi-Blade
Fan, Water
Cover, Condenser
Water-Vessel
– 30 –
Location
No.
Part
No.
225
226
227
228
229
230
235
247
250
43051323
43070139
43019829
43079087
43063164
43089106
43011508
43069761
43021870
254
43039306
Description
Switch, Float
Hose, Water
Caster
Cap
Cover, Switch
Seat-Caster
Cushion, Sub
Wire-Saddle
Motor, AC, 230V, 50Hz,
Fan STF-230-20-4C
Plate, Blower
232
248
234
233
239
Location
No.
231
232
233
234
Part
No.
231
Description
249
Location
No.
43041589 Compressor, PH94X1-4G1
43044543 Evaporator
43043523 Condenser
43043524 Condenser, Air
239
248
249
– 31 –
Part
No.
Description
43095302 Cushion, Rubber
43007890 Holder, Sensor, TA
43063188 Holder-Sensor-TC
– 32 –
TOSHIBA CORPORATION
1–1, SHIBAURA 1– CHOME, MINATO – KU, TOKYO 105 – 01, JAPAN