Download Wall mounted split conditioner Gree Classic 7

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Service Manual
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Installing, starting up, and servicing air conditioner can be
hazardous due to system pressure, electrical components,
and equipment location, etc.
Only trained, qualified installers and service personnel are
allowed to install, start-up, and service this equipment.
Untrained personnel can perform basic maintenance functions such as cleaning coils. All other operations should
be performed by trained service personnel.
Make sure the outdoor unit is installed on a stable, level
surface with no accumulation of snow, leaves, or trash
beside.
When handling the equipment, observe precautions in the
manual and on tags, stickers, and labels attached to the
equipment. Follow all safety codes. Wear safety glasses
andwork gloves. Keep quenching cloth and fire extinguisher
nearby when brazing.
Follow all the installation instructions to minimize the risk
of damage from earthquakes, typhoons or strong winds.
Read the instructions thoroughly and follow all warnings or
cautions in literature and attached to the unit. Consult local
building codes and current editions of national as well as
local electrical codes.
Recognize the following safety information:
Warning
Incorrect handling could result in
personal injury or death.
Caution
Incorrect handling may result in
minor injury,or damage to product
or property.
Warning
All electric work must be performed by a licensed technician
according to local regulations and the instructions given in
this manual.
Before installing, modifying, or servicing system, main
electrical disconnect switch must be in the OFF position.
There may be more than 1 disconnect switch. Lock out
and tag switch with a suitable warning label.
Never supply power to the unit unless all wiring and tubing are completed, reconnected and checked.
This system adopts highly dangerous electrical voltage.
Incorrect connection or inadequate grounding can cause
personal injury or death. Stick to the wiring diagram and
all the instructions when wiring.
Have the unit adequately grounded in accordance with
local electrical codes.
Have all wiring connected tightly. Loose connection may
lead to overheating and a possible fire hazard.
All installation or repair work shall be performed by your dealer or a specialized subcontractor as there is the risk of fire,
electric shock, explosion or injury.
Make sure the ceiling/wall is strong enough to bear the
weight of the unit.
Make sure the noise of the outdoor unit does not disturb
neighbors.
Avoid contact between refrigerant and fire as it generates
poisonous gas.
Apply specified refrigerant only. Never have it mixed with
any other refrigerant. Never have air remain in the
refrigerant line as it may lead to rupture and other hazards.
Make sure no refrigerant gas is leaking out when installation is completed.
Should there be refrigerant leakage, the density of refrigerant in the air shall in no way exceed its limited value,
or it may lead to explosion.
Keep your fingers and clothing away from any moving
parts.
Clear the site after installation. Make sure no foreign objects are left in the unit.
Always ensure effective grounding for the unit.
Caution
Never install the unit in a place where a combustible gas
might leak, or it may lead to fire or explosion.
Make a proper provision against noise when the unit is
installed at a telecommunication center or hospital.
Provide an electric leak breaker when it is installed in a
watery place.
Never wash the unit with water.
Handle unit transportation with care. The unit should not
be carried by only one person if it is more than 20kg.
Never touch the heat exchanger fins with bare hands.
Never touch the compressor or refrigerant piping without
wearing glove.
Do not have the unit operate without air filter.
Should any emergency occur, stop the unit and disconnect the power immediately.
Properly insulate any tubing running inside the room to
prevent the water from damaging the wall.
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Capacity ratio(%)
100
90
80
Condition
Indoor:DB27℃　WB19℃　Indoor air flow: Super High
Pipe length:4m or 5m
70
60
50
Capacity ratio(%)
120
110
100
80
60
Condition
Indoor:DB20℃　Indoor air flow:
Super High
Pipe length:4m
or 5m
40
20
40
32 33 34 35 36 37 38 39 40 41 42 43 44 45
Outdoor temp.(
0
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-15 -13 -11 -9 -7 -5 -3 -1 1 3
Outdoor temp.(
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7 9 11
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Symbol
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Color symbol
ORANGE
VIOLET
WHITE
YELLOW
RED
YEGN YELLOW GREEN
Symbol
BN
BU
BK
Symbol
COMP
Color symbol
BROWN
BLUE
BLACK
Parts name
COMPRESSOR
PROTECTIVE
EARTH
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Names and Functions of Wireless Remote Control
Note: Be sure that there are no obstructions between receiver and remote controller ;Don't drop or throw the remote control; Don't let
any liquid in the remote control and put the remote control directly under the sunlight or any place where is very hot.
Signal transmitter
SLEEP
SLEEP button
●
FAN
Press this button, Sleep On and Sleep
Off can be selected. After powered on,Sleep
Off is defaulted. After the unit is turned
off, the Sleep function is canceled. After
Sleep function set up, the signal of Sleep
will di splay. In this mode, the time of timer
can be adjusted. Under Fan and Auto
modes, this function is not available.
FAN button
●
Remote control
Press this button, Auto, Low, Middle, High
speed can be circ ul arly selecte d. Aft er
powered on, Auto fan speed is default.
AUTO
Low fan
Middle fan
High fan
ON/OFF
Note:Under the Dry mode, the fan speed isn't
adjustable, low fan speed is imperative,
but when op erating this button, the wireless
adjustable, low fan speed is imperative,
ON/OFF button
●
MODE
Press this button, the unit will be turned on,
press it once more, the unit will be turned
off. When turning on or turning off the unit,
the Timer, Sleep function will be canceled,
but the presetting time is still remained.
CLOCK
CLOCK button
●
MODE button
●
Press this button, Auto, Cool, Dry, Fan,
Heat mode can be selected circularly.
Auto mode is default while power on.
Under Auto mode, the temperature will not
be d is p lay e d ; U n de r Hea t m o de , t he
o
initial value is 28 ( 82 F) ; Under other
modes, the initial value is 25
o
( 77 F).
LIGHT
AUTO
DRY
COOL
HEAT
FAN
(Only for cooling and heating unit.
As for cooling only unit, it won’t
have any action when it receives
the signal of heating operation.)
Press this button, the clock can be set up,
signal blink and display. Within 5
seconds, the value can be adjusted by
pressing + or - button, if continuously
press this button for 2 seconds above,
in every 0.5 second s, the value on ten place
of Minute will be increase d 1. During blin king,
repress the Clock button, signal
will be
constantly displayed and it denotes the
setting succeeded. After powered on, 12:0 0
is defaulted to display and signal
will
be displayed. If there is signal be
displayed that denotes the current time
value is Clock value, otherwise is Timer value.
LIGHT button
●
Press this button to select LIGHT on or off
in the displayer. When the LIGHT on is
set,the icon
will be displayed and the
indicator light in the displayer will be on.
When the LIGHT off is set, the icon
will
be displayed and the indicator light in
the displayer will be off.
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Notice: This is a general use remote controller, it could be used for the air conditioners with multifunction; For some function, which the
model dosen't have, if press the corresponding button on the remote controller that the unit will keep the original running status.
+
+ button
●
For presetting temperature increasing.
Press this button, can set up the temperature,
when unit is on. Continuously press and
hold this button for more than 2 seconds,
the corresponding contents will be
changed rapidly, until unpress the button
then send the information,
is displlaying all along. In Auto mode, the temperature can not be set up, but operate this
button can send the signal. Centigrade
setting range: 16-30; Fahrenheit scale
setting range 61-86.
Remote control
TEMP
TEMP button
Press this button, could select displaying
the indoor setting temperature or indoor
ambient temperature.When the indoor unit
firstly power on it will display the setting
temperature, if the temperature's displaying
status is changed from other status to" ",
displays the ambient temperature, 5s later
or within 5s, it receives other remote control
signal that will return to display the setting
temperature. if the users haven't set up the
temperature displaying status, that will
display the setting temperature.
(This function is applicable to partial of models)
● After powered on, the setting temperature
displaying is defaulted, (according to
customers requirements to display, if
there is no requirement that will default
to display the presetting temperature
and there is no icon displayed on wireless
remote control). Press this button,
(When displaying
), will display
presetting temperature; (when displaying
)
will display indoor ambient temperature,
current displaying status will not be
changed. If current displays indoor
ambient temperature, if received the other
remote control signal, it will display
presetting temperature, 5s later, will back
to display the ambient temperature.
(This function is applicable to partial ofmodels)
●
X-FAN
X-FAN button
●
PressingX-FAN button in COOL or DRY
mode, the icon
is displayed and the
indoor fan will continue operation for
10 minutes in order to dry the indoor unit
even though you have turned off the unit.
After energization, X-FAN OFF is defaulted.
X-FAN is not available in AUTO,FAN or
HEAT mode.
- button
●
Presetting temperature can be decreased.
Press this button, the temperature can be
set up, continuously press this button
and hold for two seconds, the relative
contents can quickly change, until unhold
this button and send the order that the
o
( F) signal will be displayed all the time.
The temperature adjustment is unavailable under the Auto mode, but the order
can be sent by if pressing this button.
TURBO
●
TURBO button
In Cool or Heat mode, press this button
can turn on or turn off the Turbo function.
After turned on the Turbo function, its
signal will be displayed. When switching
the mode or changing fan speed, this
function will be canceled automatically.
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Notice: This is a general use remote controller, it could be used for the air conditioners with multifunction; For some function, which the
model dosen't have, if press the corresponding button on the remote controller that the unit will keep the original running status.
TIMER ON
TIMER ON BUTTON
●
Remote control
SWING UP AND DOWN BUTTON
●
TIMER OFF
TIMER OFF BUTTON
Press this button, to set up swing angle,
which circularly changes as below:
OFF
Timer On setting: Signal “ON” will blink
and display, signal
will conceal, the
numerical section will become the timer
on setting status. During 5 seconds blink,
by pressing ＋ or － button to adjust the
time value of numerical section, every
press of that button, the value will be
increased or decreased 1 minute. Hold
pressing ＋ or －button, 2 seconds later,
it quickly change, the way of change is:
During the initial 2.5 seconds, ten numbers
change in the one place of minute, then
the one place is constant, ten numbers
change in the tens place of minute at 2.5
seconds speed and carry. During 5s blink,
press the Timer button, the timer setting
succeeds. The Timer On has been set up,
repress the timer On button, the Timer
On will be canceled. Before setting the
Timer, please adjust the Clock to the
current actual time.
●
Once press this key to enter into
TIMER OFF setup, in which case
the TIMER OFF icon will blink.
The method of setting is the same
as for TIMER ON.
This is an universal use remote controller. If
remote controller sends the following three
kinds of status that the swing status of main
unit will be:
When the guide louver start to swing up and
down, if turn off the Swing, the air guide louver
will stop at current position.
which indicates the guide louver swings up
and down between that all five positions.
Guide for Operation - General Operation
1. After powered on, press ON/OFF button, the unit will start to run. (Note: When it is powered
on, the guide louver of main unit will close automatically.)
2. Press MODE button, select desired running mode.
3. Pressing + or - button, to set the desired temperature. (It is unnecessary to set the temp. at
AUTO mode.)
4. Pressing FAN button, set fan speed, can select AUTO FAN, LOW, MID and HIGH.
5. Pressing
button, to select the swing.
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Guide for Operation - Optional Operation
1. Press SLEEP button, to set sleep.
2. Press TIMER ON and TIMER OFF button, can set the scheduled timer on
3. Press LIGHT button, to control the on and off of the displaying part of the unit (This function
may be not available for some units).
4. Press TURBO button, can realize the ON and OFF of TURBO function.
Introduction for Special Function
About X-FAN function
This function indicates that moisture on evaporator of indoor unit will be blowed after the unit is stopped to avoid mould.
1. Having set X-FAN function on: After turning off the unit by pressing ON/OFF button indoor fan will continue running for about 10 min.
at low speed. In this period, press X-FAN button to stop indoor fan directly.
2. Having set X-FAN function off: After turning off the unit by pressing ON/OFF button, the complete unit will be off directly.
About AUTO RUN
When AUTO RUN mode is selected, the setting temperature will not be displayed on the LCD, the unit will be in accordance with the
room temp. automatically to select the suitable running method and to make ambient comfortable.
About turbo function
If start this function, the unit will run at super-high fan speed to cool or heat quickly so that the ambient temp. approachs the preset temp.
as soon as possible.
About Blow over hea t (This function is applicable to partial of models)
When the unit is running in Heat mode or Auto Heat mode, compressor and indoor fan is running, to turn the unit off, the compressor,
outdoor fan will stop running. The upper and lower guide board rotate to horizontal position, then the indoor fan will run at low fan speed,
10s later, the unit will turn off.
About new function of defrosting
Under switch-off state, hold MODE key for 2 seconds to enter or exit defrost H1 function. After being energized, the defrost H1 function
is defaulted off. When entering defrost H1 function, the double-8 nixie tube will display H1 under switch-off state. When adjusting to
controller will display the preset heating temperature. Within these 5 seconds, press of +, - or TIMER key will cancel the display H1, while
the double-8 nixie tube will display the preset temperature. To switch the display of temperature between Celsius and Fahrenheit after
Replacement of Batteries
1.Remove the battery cover plate from the rear of the remote controller.
2.Take out the used batteries.
3.Insert two new AAA1.5V dry batteries, and pay attention to the polarity.
4. Reinstall the battery cover plate.
Notes:
When replacing the batteries, do not use old or different types of batteries,otherwise, it
Fig.1
may cause malfunction.
If the remote controller will not be used for a long time, please remove batteries to
prevent batteries from leaking.
The operation should be performed in its receiving range.
It should be kept 1m away from the TV set or stereo sound sets.
If the remote controller does not operate normally, please take the batteries out and
reinsert them after 30 seconds. If it still can't operate properly,replace the batteries.
Fig.2
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1Temperature Parameters
Indoor preset temperature (Tpreset)
Indoor ambient temperature (Tamb.)
2 Basic functions (The temperature in this manual is expressed by Centigrade. If Fahrenheit is used, the switchover between
them is Tf=TcX1.8+32.)
Once the compressor is energized, there should be a minimum interval of 3 minutes between two start-ups. But if the unit is
de-energized and then energized, the compressor can restart within 3 minutes.
2.1 Cooling mode
2.1.1 Cooling conditions and process
When Tamb. ≥Tpreset+1 , the unit starts cooling operation. In this case, the compressor and the outdoor fan operate and the
indoor fan operates at set speed.
When Tamb. ≤Tpreset-1 , the compressor and the outdoor fan stop while the indoor fan runs at set speed.
When Tpreset-1
Tamb.
Tpreset+1 , the unit will maintain its previous running status.
In cooling mode, the four-way valve is de-energized; temperature setting range is 16 30
; the indoor unit displays operation
icon, cooling icon and set temperature.
Start cooling
Tamb.
Tpreset+1
Original operating status
Tpreset 1
min.
min.
min.
Stop cooling
Compressor
Outdoor fan
Preset speed
Indoor fan
Stop
Run
2.1.2 Protection Functions
Freeze protection
f the system is under freeze protection, the compressor and the outdoor fan stop operation, and the indoor fan operates at set
speed. If freeze protection is eliminated and the compressor has been out of operation for 3 minutes, the unit will resume its
previous running status.
During antifreeze protection
min
Compressor
Outdoor fan
Indoor fan
Preset speed
Run
Stop
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2.2 Dry Mode
2.2.1 Dry Conditions and Process
When Tamb.
Tpreset+2 , the unit starts drying and cooling operation. In this case, the compressor and the outdoor fan
operate; the indoor fan operates at low speed.
When Tpreset-2 ≤Tamb. ≤Tpreset+2 , the unit will start drying operation. In this case, the indoor fan operates at low speed;
the compressor and the outdoor fan operate for 6 minutes and stop for 4 minutes in cycle.
When Tamb.
Tpreset-2 , the compressor and the outdoor fan stop operation; the indoor fan operates at low speed.
In drying mode, the four-way valve is de-energized; temperature setting range is 16
30 ; the indoor unit displays operation
icon, dry icon and set temperature.
Tpreset +2 ˚C
Cooling
Tamb.
Drying
Tpreset –2 ˚C
Stop running
6 min.
6 min.
4 min.
4 min.
Compressor
Outdoor fan
low speed
Indoor fan
2.2.2 Protection
Run
Stop
Freeze protection
During drying and cooling operation, if the system is under freeze protection, the compressor and outdoor fan stop operation
while indoor fan operates at low speed. If freeze protection is eliminated and the compressor has been out of operation for 3
minutes, the complete unit will resume its previous running status.
During the cycle of on for 6 min and off for 4 min, if freeze protection is detected, the compressor and the outdoor fan will stop
operation; the indoor fan will operate at low speed. When freeze protection is eliminated and the compressor has been out of
operation for 4 minutes, the complete unit will resume its previous running status.
2.2.3 Other protection
Other protections are the same as those in cooling mode.
2.3 Heating mode
2.3.1 Heating conditions and process
When Tamb. ≤Tpreset+2
, the unit starts heating operation. In this case, the 4-way valve, compressor and outdoor fan operate
simultaneously; the indoor fan operates with a maximum delay of 2 minutes.
When Tamb≥Tpreset+4 , the compressor and outdoor fan stop operation. The 4-way valve remains energized; the indoor fan
blows residual heat.
When Tpreset +2
T amb.
Tpreset +4 , the unit will maintain its previous running status.
Under this mode, the 4-way valve is energized; temperature setting range is 16
30 ; the indoor unit displays operation icon,
heating icon and set temperature.
Stop heating
Tpreset+4 ℃
Original operating status
Tpreset+2 ℃
Tamb.
.
min.
min.
min.
Start heating
Compressor
Outdoor fan
Indoor fan
min.
preset wind
min.
preset wind
Reversing valve
Run
Stop
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2.3.2 Defrosting Conditions and Process
With intelligent defrosting function, the unit defrosts automatically according to the actual condition. The indoor unit displays
“H1”.
2.3.3 Protection Functions
Overheating Prevention Protection
If the evaporator tube temperature overheats, the outdoor fan stops operation. When the tube temperature returns to normal,
the outdoor fan resumes operation.
Noise Silencing Protection
If the unit is turned off by pressing ON/OFF button or during mode switchover, the 4-way valve stops with a delay of 2 minutes.
2.4 Fan mode
In fan mode, indoor fan operates at set speed while the compressor, outdoor fan, 4-way valve and electric heating tube stop
operation.
In this mode, temperature setting range is 16 30 . The indoor unit displays operation icon and set temperature.
2.5 Auto Mode
In AUTO mode, the unit will automatically select its operation mode (cooling, heating or fan) with the change of ambient
temperature. The indoor unit displays the operation icon, operation mode icon and set temperature. There is a 30-second delay
protection for mode switchover. Protection functions are the same as those in any other mode.
3 Other Control
3.1 Timer function
General timer and clock timer functions are compatible by equipping remote controller with different functions.
3.1.1 General Timer
Timer ON can be set at unit OFF. If selected ON time is reached, the unit will start to operate according to previous setting
status. Time setting range is 0.5-24hr in 30-minute increments.
Timer OFF can be set at unit ON. If selected OFF time is reached, the unit will stop operation. Time setting range is 0.5-24hr in
30-minute increments.
3.1.2 Clock Timer
Timer ON
If timer ON is set during operation of the unit, the unit will continue to operate. If timer ON is set at unit OFF, upon ON time
reaches the unit will start to operate according to previous setting status.
Timer OFF
If timer OFF is set at unit OFF, the system will keep standby status. If timer OFF is set at unit ON, upon OFF time reaches the
unit will stop operation.
Timer Change
Although timer has been set, the unit still can be turned on/off by pressing ON/OFF button of the remote controller. You can also
set the timer once again, and then the unit will operate according to the last setting.
If timer ON and timer OFF are set at the same time during operation of the unit, the unit will keep operating at current status till
OFF time reaches.
If timer ON and timer OFF are set at the same time at unit OFF, the unit will keep off status till ON time reaches.
Each day in future, the system will operate according to preset mode till OFF time reaches and stop operation till ON time
reaches. If ON time and OFF time are the same, OFF command will prevail.
3.2 Auto Button
If this button is pressed, the unit will operate in AUTO mode and indoor fan will operate at auto speed; meanwhile, the swing
motor operates. Press this button again to turn off the unit.
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3.3 Buzzer
Upon energization or availably operating the unit or remote controller, the buzzer will give out a beep.
3.4 Sleep Function
In SLEEP mode, the unit will automatically select appropriate sleep curve to operate according to different temperature setting.
3.5 Turbo Function
This function can be set in cooling or heating mode to quickly cool or heat the room.
3.6 X-FAN Function
This function can be set in COOL or DRY mode.
3.7 Automatic Control of Fan Speed
In this mode, the indoor fan will automatically select high, medium or low speed with the change of ambient temperature.
3.8 Up & Down Swing
After energization, up & down swing motor will firstly have the horizontal louver rotate anticlockwise to position 0 to close air
outlet.
If swing function has not been set after startup of the unit, horizontal louver will turn clockwise to position D in HEAT mode, or
turn clockwise to level position L in other modes.
If swing function is set when starting up the unit, the horizontal louver will swing between L and D.
There are 7 swing status of horizontal louver: Positions L, A, B, C and D, swing between L and D and stop at any position
between L and D (angles between L and D are equiangular).
Upon turning off the unit, the horizontal louver will close at position 0. Swing function is available only when swing function is set
and indoor fan is operating.
Note: If the position is set between L and B, A and C or B and D by remote controller, the horizontal louver will swing between L
and D.
O
0
3.9 Display
3.9.1 Operation and Mode Icons
L
A
B
C
D
Upon energization, the unit will display all icons. Under standby state, running indicating mark is displayed in red. If the unit is
started by remote controller, running indicating mark gives off light; meanwhile, the mark of current running mode will be
displayed (mode LED: cooling, heating and dry mode). If the light button is turned off, no mark will be displayed.
3.9.2 Display of Nixie Tube on Indoor Unit
When energized & started for the first time, the indoor unit defaults to displaying current set temperature (16 30 ). When set
temperature display is set by remote controller, it will display set temperature; when room temperature display is set, it will
display room temperature. After that, when operating the remote controller for other settings, the temperature display method
will keep original.
When operating the remote controller during room temperature display, the set temperature will be displayed for 5 seconds
firstly and then room temperature display returns.
“F1” will be displayed upon malfunction of room temperature sensor, “F2” upon malfunction of indoor unit tube temperature
sensor and “C5” upon malfunction of jumper cap.
For some models, if set temperature display is set by the remote controller, current set temperature will be displayed. After that,
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when switching to room temperature display from set temperature or outdoor temperature by the remote controller, room
temperature will be displayed for 5 seconds firstly and then set temperature display returns.
3.10 Locked protection to PG motor
If the indoor fan motor keeps low rotation speed for a continuous period of time after startup, the unit will stop operation and
display “H6”.
3.11 Memory Function
Memorized items: mode, up & down swing, light, set temperature and set fan speed.
When power is recovered after power failure, the unit will automatically start operation according to memorized status. After
power recovery, the unit without timer setting before power failure will operate according to the last setting; the unit with general
timer setting which has not been fulfilled before power failure will memorize the timer setting and re-calculate the time after.
4 Special functions (optional)
4.1 HEALTH function
During operation of the indoor unit fan, press HEALTH button on the remote controller to start health function (If there is not
HEALTH button on the remote controller, the unit defaults health function ON).
4.2 I FEEL function
When I FEEL command is received, the controller will operate according to the ambient temperature sent by the remote
controller (For defrosting and cold blow prevention, the unit operates according to the ambient temperature sensed by the air
conditioner). The remote controller will regularly send ambient temperature data to the controller. When the data has not been
received for a long time, the unit will operate according to the temperature sensed by the air conditioner. If I FEEL function is
not selected, the ambient temperature will be that sensed by the air conditioner. I FEEL function is not to be memorized.
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outlet pipe of
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electric wire
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earth connection?
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or damage the part.
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capacity.
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Start
Is the wiring
terminal between temperature
sensor and the controller loosened or
poo rly contacted?
yes
Insert the temperature
sensor tightly
no
no
Is there short circuit due to tri-pover
of the pa rts?
Malfunction is
eliminated.
yes
Make the parts upright
no
no
Is the tem perature
sensor normal according to the
Resistance Table?
Malfunction is
eliminated.
yes
no
Replace it with a
temperature sensor
of the same model
yes
no
Malfunction is
removed.
yes
Replace the controller with
one of the same model
yes
End
7URXEOHVKRRWLQJ
+0DOIXQFWLRQ
Possible causes:
1. Fan motor is locked;
2. The.feedback.terminal of PG motor is not connected tightly;
3. The control terminal of PG motor is not connected tightly;
4. Motor is damaged;
5. Malfunction of the rotation speed detection circuit of the mainboard.
See the
chart below:
“H6”is
displayed on
the unit.
Stir the fan blade
with a hand when
the unit is DE ENERGIZED.
Does the
blade rotate
unsmoothly?
Yes
Reinstall the motor
and the blade to
make it rotate
smoothly.
Is the
malfunction
eliminated?
No
No
Is the
feedback
terminal of PG
motor loose?
Yes
Insert the feedback
terminal tightly .
Is the
malfunction
eliminated?
No No
Is the
control terminal
of PG motor
loose?
Yes
Insert the control
terminal tightly.
Is the
malfunction
eliminated?
No
No
Re-energize
to turn on the unit;
measure within 1 min after the
louvers are opened whether the output
voltage on the control terminal
of the PG motor is over 50V?
No
No
Mainboard
malfunction;
Replace it.
Yes
Yes
Yes
Replace the fan
motor.
Is the
malfunction
eliminated?
Yes
End
7URXEOHVKRRWLQJ
&0DOIXQFWLRQ
Possible causes:
1. There is no jumper cap on the controller;
2. Jumper cap is not inserted properly and tightly;
3. Jumper cap is damaged;
4. Controller is damaged.
chart below:
See the
C5 is displayed
on the unit.
Is there jumper cap on the
controller?
Yes
No
Install a matching
jumper cap.
Is the
malfunction
eliminated?
No
Is the jumper cap inserted
incorrectly or improperly?
No
No
Yes
Re-insert the jumper
cap
Is the
malfunction
eliminated?
Yes
Replace the jumper
cap
Is the
malfunction
eliminated?
Yes
No
The mainboard is
defined abnormal
replace it
End