Download Electrolux EXI12HD1W Service manual

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SERVICE MANUAL
AIR CONDITIONER
Electrolux Home Products Italy S.p.A.
Corso Lino Zanussi, 30
I - 33080 Porcia – PN Fax: + 39 0434 394096
Publication number
599 76 40-62
EN
Edition: 02-2013 Rev 0.0
MODEL:
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EXI12HD1W
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Cooling
Heating
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10
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Current(A)
Current(A)
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Condition
Indoor:DB 27 WB19
Indoor air flow: Turbo
Pipe length:5m
Voltage:230V
2
EXI09HD1W
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3
Condition
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Indoor air flow:Turbo
Pipe length:5m
Voltage:230V
2
1
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40
60
80
100
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120
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60
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100
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110
120
100
100
90
80
Capacity ratio(%)
Capacity ratio(%)
Cooling
80
70
60
Condition
Indoor:DB27℃ WB19℃
Indoor air flow: Turbo
Pipe length:5m
50
32 33 34 35 36 37 38 39 40 41 42 43 44 45 46
Outdoor temp. (°C)
60
40
Condition
Indoor:DB20℃
Indoor air flow: Turbo
Pipe length:5m
20
0
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10
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30
25
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High
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60
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4-Way valve
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Live wire of
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Port of motor for
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Port of indoor ambient
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temp sensor
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transformer
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inductance pin1
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fan neilsbed
four-way valve
compressor
electric heater
chassis
electric heater
10-core
communication cable
compressor
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temp. sensor
overload protection
electric expansion valve
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Turbo Button
Press this button in COOL or HEAT mode to put
the fan into the high speed Turbo mode and the
air conditoner will work at maximum power.
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Press again to cancel this function.
X-Fan Button
Press the X-Fan button to active the
Self-Cleaning. After the unit is turned off the
indoor fan will continue operation for 2 minutes
to dry the indoor unit prevent from bacteria and
mildew growing.
Timer On Button
Press this button to set the start time.
Timer Off Button
Press this button to set the stop time.
Swing Button:
Press this button, the louver will swing up and
down automatically. Press again to cancel it and
the louver will stay at its last position.
ON/OFF Button
Press this button to turn the air conditioner
ON or OFF.
I Feel Button:
Press this button, the remote control will send
the temperature information to the indoor unit
every 10 minutes. The unit will operate to reach
the set temperature at the location of remote
control. Presss again to cancel this function.
Control Button:
Forward
Backward
Mode Button
By pressing this button, AUTO, DEHUMIDIFY,
FAN, COOL, and HEAT (COOL only model
has no HEAT feature) mode can be selected
progressively.
Press the
setting.
button to increase the temperature
button to decrease the temperature
AUTO mode is default while power on.
Under AUTO mode, the initial value would not
be displayed, and it will run in the desirable Tem.
Press the
setting.
In Timer On/Off or Clock functions, use these
buttons to set the clock or timer adjustment.
Under HEAT mode, the initial value is 28°C;
Under other modes, the initial value is 25°C.
AUTO
DEHUMIDIFY
FAN
COOL
Clock Button:
Press this button and the Clock symbol will
blink. You can press Control buttons and to
set the time you want.
HEAT
Light Button
Press this button to switch the indicating lights
of the indoor unit ON or OFF.
The normal condition at start up is ON.
Fan Button
By pressing this button, Auto, Low, Medium and
High speed can be progressively selected.
When the unit is turned on, Auto fan speed is
the default.
In DEHUMIDIFY mode, the fan speed is
at Low speed.
Temp (Temperature) Button
Press this button to change the indoor unit
display of the set temperature to the room
temperature.
Eco (Economy) Button
Press this button to start the Eco operation.
This is ideal for the users to use while sleeping.
Press again to cancel the function.
Note:
Under heating mode, press T
" emp and Clock
buttons to turn on the function of heating the
indoor room temperature to 8oC.
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Transmission Indicator:
Displays when the remote control transmits
signals to the indoor unit.
Fan Speed Display
Displays the selected fan speed in the following
sequence:
Turbo Display
Displays when Turbo function is selected.
“ ” (Low), “
Auto.
I Feel Display
Displays when I Feel function is activated.
In Auto speed, only “ ” symbol displays.
Eco Display
Displays when Eco function is selected.
Healthy Display
Displayed by pressing the Healthy button.
Press the Healthy button again to remove.
NOTE: there is no such indicator for the
models without Cold-Plasma function.
Room Temperature Display
Displays when the temperature shown on the
LCD screen is room temperature. It can be
switched on/off by pressing the Temp button.
Programmed Temperature Display
Lights when the remote control displays the
set temperature. It can be switched on/off by
pressing the Temp button.
Timer On/Off Display
Displays when the Timer On/Off function is
activated.
” (Medium), “
” (High) and
Swing Display
Displays when the Swing function is selected.
X-Fan Display
Displays when the X-Fan function is activated by
pressing Turbo and Healthy buttons at the same
time (for models with Cold-plasma function) or by
pressing X-Fan button (for models without Coldplasma function)
Temperature Display
Displays the room or set temperature in °C or F.
No display in Fan mode.
Time Display
Displays the Clock time (must be set) and/or the
on/off time of the timer.
Mode Display
Displays the current operation mode, including
Auto (
), Dehumidify ( ), Fan ( ), Cool (
and Heat ( ).
)
NOTE: The Cool model does not offer a Heating
option.
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1. Temperature Parameters
Indoor preset temperature (Tpreset)
Indoor ambient temperature (T amb.)
2. Basic Functions
Once energized, in no case should the compressor be restarted within less than 3 minutes. In the situation that memory
function is available, for the first energization, if the compressor is at stop before de-energization, the compressor will be
started without a 3-minute lag; if the compressor is in operation before de-energization, the compressor will be started with
a 3-minute lag; and once started, the compressor will not be stopped within 6 minutes regardless of changes in room
temperature;
(1)COOL mode
The condition and process of cooling
If Tamb. ≥Tpreset COOL mode will act, the compressor and outdoor fan will run, and the indoor fan will run at the set speed.
If Tamb. ≤Tpreset-2 , the compressor will stop, the outdoor fan will delay 30 seconds to stop, and the indoor fan will run at the set speed.
If Tpreset-2
≤Tamb ≤Tpreset , the unit will keep running in the previous mode.
In this mode, the reversal valve will not be powered on and the temperature setting range is 16
~30 .
Start cooling
Tamb.
Tpreset
Original operating status
Tpreset –2 ˚C
≥ 6 min.
≥ 3 min.
≥ 6 min.
Stop cooling
Compressor
Outdoor fan
Setting fan speed
Indoor fan
Run
Protection function
Overcurrent protection
Stop
If total current is high, the compressor will run in limited frequency. If total current is too high, the compressor will stop, the
outdoor fan will delay 30 seconds to stop, indoor unit will display E5 and outdoor yellow light will blink 5 times.
Antifreezing protection
When the antifreezing protection is detected, the compressor will stop, the outdoor fan will stop after 30 seconds, and the
indoor fan and swing motor will keep running in the original mode. When antifreezing protection is eliminated and the
compressor has stopped for 3 minutes, the compressor will resume running in the original mode.
During antifreeze protection
min
Compressor
Outdoor fan
Preset speed
Indoor fan
Run
Stop
(2) Dehumidifying Mode
Working conditions and process of dehumidifying
If T amb. T preset, the unit will enter cooling and dehumidifying mode, in which case the compressor and the outdoor fan will
operate and the indoor fan will run at low speed.
If T preset -2
T amb. T preset, the compressor remains at its original operation state.
If T amb.< T preset -2 , the compressor will stop, the outdoor fan will stop with a time lag of 30s, and the indoor fan will
operate at low speed.
Protection
Protection is the same as that under the cooling mode.
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The breaker trips at once when it
is set to “ON”.
Air conditioner can not
start up
Trip of breaker or
blow of fuse
The air conditioner does not
react after it is
powered ( after
the plug is
inserted, the
buzzer does not
sound and the
remote startup
has no
response)
to ground to see if there is any
leakage.
The breaker trips in few minutes
when it is set to “ON”.
The circuit or the part of the air
conditioner has malfunction.
They heat and break the insulation and lead to short circuit or
creepage. Measure the insulation resistance or eliminate the
malfunction one by one. If the
breaker itself has malfunction,
then replace the breaker.
No power
Check power supply circuit.
Power plug is not well plugged in
and poor connection.
Check if the plug is properly
plugged in and make the loose
contact firm.
Fuse of controller burnt out
Change controller fuse
The transformer connection is
loose or has bad contact or the
transformer has malfunction.
Fasten the wiring; measure the
output voltage of the transformer , if it is incorrect, change
the transformer.
Controller is broken
Check remote controller
Remote controller is short of power
The remote
controller does
not receive
signals (after it
is powered, the
buzzer will
sound, unless it
has
malfunction)
Measure insulation resistance
Remote controller malfunction
Receiver loose or poor connection
Receiver is broken
Power voltage is too low
Change batteries
First, press the manual switch
button AUTO,if there is no
response,check based on the
above methods. If it runs normally after pressing the button,
check again whether the installation position and the connection wire of the reception head
is correct. If it is correct,then replace the receiver or the remote
controller.
Check the voltage. If it is lower than 10% of
the rated voltage, check the cause, improve
the power supply condition and add the stabilized voltage power supply.
7URXEOHVKRRWLQJ
Improper set of temperature
Adjust set temperature
If cooling (heating) load is
Check the forecasted load of cooling (heating)
proper
The refrigerant has leakage or is
insufficient
Check and fill the leakage, then
vacuumize it and supplement the refrigerant as required
Leakage between the high presMalfunction of
refrigerant
flow
sure and the low pressure inside the compressor
Malfunction of four-way valve
Local block of capillary
Poor COOL(HEAT) operation
Replace the compressor
Blockage of cooling system
Replace the four-way valve
Replace the capillary
Judge whether the system is blocked by
observing the condensation of evaporator and the pressure value of the high
pressure manometer and take measures
to deal with the system.
Heat insulation for the connection
pipes of the indoor unit and the outdoor unit is bad.
Make sure that heat insulation for the thick and thin pipes
is good. Heat insulation must also be provided for the
joint andthe exposed part of the copper pipe .
Block of outdoor heat exchanger
Clean the dust accumulated on the
surface of the heat exchanger.
Air filter were blocked
Clean the filter
Fan speed was set too slow
Air circulation
is insufficient
Fan rotation speed becomes
low
The installation position of the
outdoor unit is not appropriate.
The outdoor temperature is too high.
To set the fan speed to high or
middle speed
Capacitor
Replace the
damage
capacitor
Motor damage
Replace the motor
Good ventilation must be provided for the
installation position of the outdoor unit.
Properly install the rainproof plate or the sunproof plate. If the
maximum cool air still can not meet the requirement, it is suggested to replace the air conditioner.
The air tightness is not enough. People
come in and out too frequently. There
are heating devices indoors.
Keep certain air tightness indoors, try not to use
electricalappliance with large quantity of heat
7URXEOHVKRRWLQJ
The indoor fan motor is burned or
breaks or has the heat protector
malfunction.
Replace the fan motor or the defective part.
The fan does not
The built-in heat protector of the
motor breaks frequently because the
Replace the fan motor
run when it is set
to supply air.
motor is abnormal.
Wrong connection
The fan capacitor has open circuit or
is damaged.
Make the correction connection based on
the circuit drawing.
Replace the fan capacitor of the same type
and same specification.
In the cooling and
The outdoor fan motor is damaged.
Replace the fan motor
heating mode,
the compressor
Wrong connection
Make the correct connection based on the
circuit drawing
The outdoor fan capacitor is damaged.
Replace the fan capacitor
runs, but the outdoor fan does not
run.
Malfunction of compressor
Replace the compressor
Breakage of running capacitor of
In the cooling
and heating
mode, the
outdoor fan
runs, but the
compressor
does not run.
compressor
The voltage is too low or too
high.
Wrong wire connection
The protector itself has malfunction.
The refrigerant is not enough or is too
much.
The compressor is too hot
and leads to the
action of the
protector.
Replace the capacitor
Manostat is recommended.
Connect the circuit diagram correctly
Use the multimeter to check whether the
contact of the compressor is on when it is
not overheated. If it is not on, then replace
the protector
Adjust the volume of the refrigerant
The capillary is blocked and the temperature rises.
Replace the capillary
The compressor does not run
Replace the compressor
smoothly or is stuck. The air discharge
valve is damaged
The protector itself has malfunction.
Replace the protector
7URXEOHVKRRWLQJ
The torque of the swing motor is not
enough
The swing fan
does not run.
Wrong connection
First, check whether the connection is
wrong. If no, replace the parts
The controller is damaged(IC2003 is
damaged, the swing relay can not
close, etc)
Controller malfunction (IC2003
broken, creepage of parallel capaci-
Change controller
In cool, heat
mode, the
tor of relay loop, relay is broken etc.)
outdoor unit
and compres-
Wire loose or wrong connection
Correctly wire according to the drawing
Improper setting of temperature
Adjust setting temp.
Drainage pipe blocked or broken
Change drainage pipe
Wrap of refrigerant pipe joint is not
Re-wrap and make it tight.
sor will not run.
Water leakage
close enough.
Fan of indoor unit contacts other parts
Foreign object in indoor unit
Compressor shakes too much
Adjust fan location
Take out the foreign object
Adjust support washer of compressor, and
tighten loosen screws
Abnormal sound
and shake
Touch of pipeline of outdoor unit
Separate the touching pipeline.
Touch of inner plates
1. Tighten connect screw.
2. Stick absorbing clay between plates.
Louver of outdoor unit touched outer
case.
Adjust location of louver.
Abnormal sound inside compressor
Change compressor
7URXEOHVKRRWLQJ
)ODVKLQJ/('RI,QGRRU2XWGRRU8QLWDQG3ULPDU\-XGJHPHQW
Display Method of Indoor Unit
NO.
1
2
3
Malfunction
Name
High
pressure
protection of
system
Antifreezing
protection
In defect of
refrigerant
4
High
discharge
temperature
protection of
compressor
5
Overcurrent
protection
6
Communication
Malfunction
7
High
temperature
resistant
protection
8
EEPROM
malfunction
9
Limit/
decrease
frequency
due to high
temperature
of module
10
Malfunction
protection of
jumper cap
Indicator Display (during
Dual-8 blinking, ON 0.5s and OFF
Code 0.5s)
Display
Operation Cool
Heating
Indicator Indicator Indicator
E1
E2
Display Method of Outdoor
Unit
Indicator has 3 kinds of
display status and during
blinking, ON 0.5s and OFF
0.5s
A/C status
Yellow
Red
Green
Indicator Indicator Indicator
During cooling and drying
operation, except indoor
fan operates, all loads stop
operation.
During heating operation, the
complete unit stops.
OFF 3s
and blink
once
OFF 3S
and blink
twice
Possible Causes
During cooling and drying
operation, compressor and
outdoor fan stop while indoor
fan operates.
OFF 1S
and blink
3 times
OFF 1S
and
blink
9 times
F0
Possible reasons:
1. Refrigerant was superabundant;
2. Poor heat exchange (including
and bad radiating environment );
Ambient temperature is too high.
1. Poor air-return in indoor unit;
2. Fan speed is abnormal;
3. Evaporator is dirty.
1.In defect of refrigerant;
The Dual-8 Code Display will 2.Indoor evaporator temperature
show F0 and the complete unit sensor works abnormally;
stops.
3.The unit has been plugged up
somewhere.
E4
OFF 3S
and blink
4 times
OFF 1S
and blink
7 times
During cooling and drying
operation, compressor and
outdoor fan stop while indoor
fan operates. During heating
operation, all loads stop.
Please refer to the malfunction
analysis (discharge protection,
overload).
E5
OFF 3S
and blink
5
times
OFF 1S
and blink
5 times
During cooling and drying
operation, compressor and
outdoor fan stop while indoor
fan operates. During heating
operation, all loads stop.
1. Supply voltage is unstable;
2. Supply voltage is too low and
load is too high;
3. Evaporator is dirty.
E6
OFF 3S
and blink
6
times
Always
ON
During cooling operation,
compressor stops while
indoor fan motor operates.
During heating operation, the
complete unit stops.
Refer to the corresponding
malfunction analysis.
E8
OFF 3S
and blink
8
times
OFF 1S
and blink
6 times
During cooling operation:
compressor will stop while
indoor fan will operate.
During heating operation, the
complete unit stops.
Refer to the malfunction analysis
(overload, high temperature
resistant).
OFF 3S OFF 1S
and blink and blink
15 times 11 times
EE
OFF 3S OFF 3S
and blink and blink
6 times 6 times
EU
C5
OFF 3S
and blink
15 times
During cooling and drying
operation, compressor will stop
Replace outdoor control panel AP1
while indoor fan will operate;
During heating operation, the
complete unit will stop
All loads operate normally,
while
operation frequency for
compressor is decreased
Wireless remote receiver and
button are effective, but can
not dispose the related
command
Discharging after the complete unit
is de-energized for 20mins, check
whether the thermal grease on
IPM Module of outdoor control
the radiator is inserted tightly.
If its no use, please replace control
panel AP1.
1. No jumper cap insert on
mainboard.
2. Incorrect insert of jumper cap.
3. Jumper cap damaged.
4. Abnormal detecting circuit of
mainboard.
7URXEOHVKRRWLQJ
Display Method of Indoor Unit
NO.
11
12
13
14
15
Malfunction
Name
Gathering
refrigerant
Indoor
ambient
temperature
sensor is
open/short
circuited
Indoor
evaporator
temperature
sensor is
open/short
circuited
Outdoor
ambient
temperature
sensor is
open/short
circuited
Outdoor
condenser
temperature
sensor is
open/short
circuited
16
Outdoor
discharge
temperature
sensor is
open/short
circuited
17
Limit/
decrease
frequency
due to
overload
18
Decrease
frequency
due to
overcurrent
Indicator Display (during
Dual-8 blinking, ON 0.5s and OFF
Code 0.5s)
Display
Operation Cool
Heating
Indicator Indicator Indicator
Fo
F1
OFF 3S OFF 3S
and blink and blink
1 times 1 times
Display Method of Outdoor
Unit
Indicator has 3 kinds of
display status and during
blinking, ON 0.5s and OFF
0.5s
A/C status
Yellow
Red
Green
Indicator Indicator Indicator
When the outdoor unit receive
signal of Gathering refrigerant
,the system will be forced to
Nominal cooling mode
run under cooling mode for
gathering refrigerant
OFF 1S
and blink
17 times
1. Loosening or bad contact of
indoor ambient temp. sensor and
During cooling and drying
mainboard terminal.
operation, indoor unit operates
2. Components in mainboard fell
while other loads will stop;
down leads short circuit.
during heating operation,
3. Indoor ambient temp. sensor
the complete unit will stop
damaged.(check with sensor
operation.
resistance value chart)
4. Mainboard damaged.
OFF 3S
and blink
once
AC stops operation once
reaches the setting
F2
OFF 3S
and blink
twice
F3
OFF 3S
and blink
3 times
F4
OFF 3S
and blink
4 times
Possible Causes
temperature. Cooling, drying:
internal fan motor stops
operation while other loads
stop operation; heating: AC
stop operation
OFF 1S
and
blink
6 times
OFF 1S
and
blink
5 times
During cooling and drying
operating, compressor stops
while indoor fan operates;
During heating operation,
the complete unit will stop
operation
During cooling and drying
operation, compressor stops
while indoor fan will operate;
During heating operation,
the complete unit will stop
operation.
1. Loosening or bad contact of
Indoor
evaporator temp. sensor and
mainboard terminal.
2. Components on the mainboard
fall
down leads short circuit.
3. Indoor evaporator temp. sensor
damaged.(check temp. sensor
value
chart for testing)
4. Mainboard damaged.
Outdoor temperature sensor
hasnt been connected well or
is damaged. Please check it by
referring to the resistance table for
temperature sensor)
Outdoor temperature sensor
hasnt been connected well or
is damaged. Please check it by
referring to the resistance table for
temperature sensor)
F5
OFF 3S
and blink
5 times
OFF 1S
and
blink
7 times
During cooling and drying
operation, compressor will sop
after operating for about 3
mins,
while indoor fan will operate;
During heating operation, the
complete unit will stop after
operating for about 3 mins.
1.Outdoor temperature sensor
hasnt been connected well or is
damaged. Please check it by
referring to the resistance table for
temperature sensor)
2.The head of temperature sensor
hasnt been inserted into the copper
tube
F6
OFF 3S
and blink
for 6
times
OFF 1S
and
blink
3 times
All loads operate normally,
while
operation frequency for
compressor is decreased
Refer to the malfunction analysis
(overload, high temperature
resistant)
F8
OFF 3S
and blink
8 times
OFF 1S
and
blink
once
All loads operate normally,
while
operation frequency for
compressor is decreased
The input supply voltage is too low;
System pressure is too high and
overload
7URXEOHVKRRWLQJ
Display Method of Indoor Unit
NO.
Malfunction
Name
Indicator Display (during
Dual-8 blinking, ON 0.5s and OFF
Code 0.5s)
Display
Operation Cool
Heating
Indicator Indicator Indicator
Display Method of Outdoor
Unit
Indicator has 3 kinds of
display status and during
blinking, ON 0.5s and OFF
0.5s
19
F9
OFF 3S
and blink
9 times
OFF 1S
and
blink
twice
All loads operate normally,
while
OFF 3S OFF 3S
and blink and blink
2 times 2 times
OFF 1S
and
blink
4 times
All loads operate normally,
discharge
20
Limit/
decrease
frequency
FH
due to
antifreezing
21
Voltage for
DC bus-bar
is too high
PH
OFF 1S
and
blink
13 times
OFF 3S
and blink
11 times
Possible Causes
Yellow
Red
Green
Indicator Indicator Indicator
Decrease
frequency
due to
high air
A/C status
operation frequency for
compressor is decreased
while operation frequency for
compressor is decreased
Overload or temperature is too
high;
Malfunction of electric expansion
valve (EKV)
Poor air-return in indoor unit or fan
speed is too low
1. Measure the voltage of position
L and N on wiring board (XT), if the
During cooling and drying
voltage is higher than 265VAC, turn
operation, compressor will stop on the unit after the supply voltage
is increased to the normal range.
while indoor fan will operate;
2.If the AC input is normal,
During heating operation, the measure the voltage of electrolytic
complete unit will stop
capacitor C on control panel (AP1),
operation.
if its normal, theres malfunction
for the circuit, please replace the
control panel (AP1)
1. Measure the voltage of position
L and N on wiring board (XT), if the
voltage is higher than 150VAC,
22
Voltage of
DC bus-bar
is too low
OFF 3S
and blink
21 times
PL
OFF 1S
and
blink
12 times
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
turn on the unit after the supply
voltage is increased to the normal
range.
2.If the AC input is normal,
measure the voltage of electrolytic
capacitor C on control panel (AP1),
if its normal, theres malfunction
for the circuit, please replace the
control panel (AP1)
23
Compressor
Min
frequence in
test state
24
Compressor
rated
frequence in
test state
25
Compressor
maximum
frequence in
test state
P0
(during
blinking,
ON
0.25s
and OFF
0.25s)
(during
blinking,
ON
0.25s
and OFF
0.25s)
Showing during min. cooling or
min. heating test
P1
(during
blinking,
ON
0.25s
and OFF
0.25s)
(during
blinking,
ON
0.25s
and OFF
0.25s)
Showing during nominal cooling or
nominal heating test
P2
(during
blinking,
ON
0.25s
and OFF
0.25s)
(during
blinking,
ON
0.25s
and OFF
0.25s)
Showing during max. cooling or
max. heating test
7URXEOHVKRRWLQJ
Display Method of Indoor Unit
NO.
Malfunction
Name
Indicator Display (during
Dual-8 blinking, ON 0.5s and OFF
Code 0.5s)
Display
Operation Cool
Heating
Indicator Indicator Indicator
Compressor
26
intermediate
frequence in
test state
P3
(during
blinking,
ON
0.25s
and OFF
0.25s)
Display Method of Outdoor
Unit
Indicator has 3 kinds of
display status and during
blinking, ON 0.5s and OFF
protection of
phase
current for
P5
(during
blinking,
ON
0.25s
and OFF
0.25s)
28
29
30
Malfunction
of module
temperature
sensor circuit
Module high
temperature
protection
PU
P7
P8
Showing during middle cooling or
middle heating test
During cooling and drying
Refer to the malfunction
operation, compressor will stop
analysis (IPM protection, loss
while indoor fan will operate;
of synchronism protection and
During heating operation, the
overcurrent protection of phase
complete unit will stop
current for compressor.
operation.
OFF 3S
and blink
15 times
compressor
Charging
malfunction
of capacitor
Possible Causes
Yellow
Red
Green
Indicator Indicator Indicator
Overcurrent
27
A/C status
0.5s
OFF 3S
and blink
17 times
OFF 3S
and blink
18 times
OFF 3S
and blink
19 times
During cooling and drying
operation, compressor will stop
Refer to the part three—charging
while indoor fan will operate;
malfunction analysis of capacitor
During heating operation, the
complete unit will stop
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
Replace outdoor control panel AP1
During heating operation, the
complete unit will stop
During cooling operation,
compressor will stop while
indoor fan will operate;
During heating operation, the
complete unit will stop
After the complete unit is deenergized for 20mins, check
whether the thermal grease on IPM
Module of outdoor control panel
radiator is inserted tightly. If its no
use, please replace control panel
AP1.
Decrease
frequency
31
due to high
temperature
resistant
H0
10 times
during
heating
operation
32
Static
dedusting
H2
protection
33
Overload
protection for
compressor
OFF 3S
and blink
All loads operate normally,
while
operation frequency for
compressor is decreased
Refer to the malfunction analysis
(overload, high temperature
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
operation.
1. Wiring terminal OVC-COMP
is loosened. In normal state, the
resistance for this terminal should
be less than 1ohm.
2.Refer to the malfunction analysis (
discharge protection, overload)
resistant)
OFF 3S
and blink
twice
H3
OFF 3S OFF 1S
and blink and blink
3 times 8 times
7URXEOHVKRRWLQJ
Display Method of Indoor Unit
NO.
Malfunction
Name
Indicator Display (during
Dual-8 blinking, ON 0.5s and OFF
Code 0.5s)
Display
34
System is
abnormal
Display Method of Outdoor
Unit
Indicator has 3 kinds of
display status and during
blinking, ON 0.5s and OFF
0.5s
H5
OFF 3S OFF 1S
and blink and blink
5 times 4 times
36
Module
temperature
is too high
H5
OFF 3S OFF 1S
and blink and blink
5 times 10 times
37
Internal motor
(fan motor) do
not operate
H6
38
Desynchronizing of
compressor
H7
OFF 3S
and blink
7 times
39
PFC
protection
HC
OFF 3S OFF 1S
and blink and blink
6 times 14 times
Refer to the malfunction analysis
(overload, high temperature
resistant)
operation.
During cooling and drying
Refer to the malfunction
operation, compressor will stop
analysis (IPM protection, loss
while indoor fan will operate;
of synchronism protection and
During heating operation, the
overcurrent protection of phase
complete unit will stop
current for compressor.
operation.
1. Bad contact of DC motor
feedback terminal.
Internal fan motor, external fan 2. Bad contact of DC motor
motor, compressor and electric control end.
heater stop operation,guide
3. Fan motor is stalling.
louver stops at present
4. Motor malfunction.
location.
5. Malfunction of mainboard rev
detecting circuit.
During cooling and drying
Refer to the malfunction
operation, compressor will stop analysis (IPM protection, loss
while indoor fan will operate;
of synchronism protection and
During heating operation, the
overcurrent protection of phase
complete unit will stop
current for compressor.
operation.
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
Refer to the malfunction analysis
During heating operation, the
complete unit will stop
operation.
OFF 3S
and blink
11 times
OFF 1S
and
blink
14 times
DC fan motor malfunction or
Outdoor DC fan motor
malfunction lead to compressor system blocked or the connector
stop operation,
loosed
OFF 3S
and blink
23 times
OFF 1S
and blink
9 times
compressor stop operation and
To protect the electronical
Outdoor fan motor will stop
components when detect high
30s latter , 3 minutes latter
fan motor and compressor will power
restart
OFF 1S
and blink
16 times
compressor and Outdoor fan
motor can’t work
41
power
protection
L9
OFF 3S
and blink
20 times
42
Indoor unit
and outdoor
unit doesn't
match
LP
OFF 3S
and blink
19 times
Failure startup
while indoor fan will operate;
During heating operation, the
complete unit will stop
L3
malfunction
43
During cooling and drying
operation, compressor will stop
OFF 3S OFF 1S
and blink and blink
4 times 6 times
H4
IPM
protection
Outdoor DC
fan motor
Possible Causes
Operation Cool
Heating Yellow
Red
Green
Indicator Indicator Indicator Indicator Indicator Indicator
35
40
A/C status
LC
OFF 3S
and blink
11 times
Indoor unit and outdoor unit doesn't
match
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
Refer to the malfunction analysis
During heating operation, the
complete unit will stop
operation.
7URXEOHVKRRWLQJ
Display Method of Indoor Unit
NO.
Malfunction
Name
Indicator Display (during
Dual-8 blinking, ON 0.5s and OFF
Code 0.5s)
Display
Operation Cool
Heating
Indicator Indicator Indicator
Malfunction of
phase current
44
detection
circuit for
U1
Display Method of Outdoor
Unit
Indicator has 3 kinds of
display status and during
blinking, ON 0.5s and OFF
45
46
47
48
dropping for
DC bus-bar
Malfunction
of complete
units current
detection
The four-way
valve is
abnormal
Zerocrossing
malfunction of
outdoor unit
OFF 3S
During cooling and drying
operation, compressor will stop
and blink
13 times
while indoor fan will operate;
During heating operation, the
Replace outdoor control panel AP1
complete unit will stop
OFF 3S
and blink
20 times
U3
U5
U7
U9
During cooling and drying
operation, compressor will stop
while indoor fan will operate;
During heating operation, the
complete unit will stop
Supply voltage is unstable
OFF 3S
and blink
13 times
During cooling and drying
operation, the compressor will
Theres circuit malfunction on
stop while indoor fan will
outdoor units control panel AP1,
operate;
please replace the outdoor units
During heating operating,
control panel AP1.
the complete unit will stop
operation.
OFF 3S
and blink
20 times
If this malfunction occurs
during
heating operation, the complete
unit will stop operation.
1.Supply voltage is lower than
AC175V;
2.Wiring terminal 4V is loosened or
broken;
3.4V is damaged, please replace
4V.
During cooling operation,
compressor will stop while
indoor fan will operate; during
heating,the complete unit will
stop operation.
Replace outdoor control panel AP1
OFF 3S
and blink
18 times
Frequency
OFF 1S
and blink
13 times
49
limiting
(power)
50
Compressor
running
51
The
temperature
for turning
on the unit is
reached
OFF 1S
and blink
8 times
52
Frequency
limiting
(module
temperature)
OFF 1S
and blink
11 times
Possible Causes
Yellow
Red
Green
Indicator Indicator Indicator
compressor
Malfunction of
voltage
A/C status
0.5s
OFF 1S
and blink
once
7URXEOHVKRRWLQJ
Display Method of Indoor Unit
Indicator Display (during
NO.
Malfunction
Name
status and during blinking, ON
Dual-8 blinking, ON 0.5s and OFF
0.5s)
0.5s and OFF 0.5s
Code
Heating Yellow
Red
Green
Display Operation Cool
Indicator
53
Display Method of Outdoor Unit
Indicator has 3 kinds of display
Indicator Indicator Indicator Indicator
Defrosting
Possible Causes
Indicator
OFF 0.5S
and blink
once
Normal
communication
54
A/C status
OFF 3S
and blink
once
(during
OFF 1S
blinking,
and blink
ON 10s
twice
and OFF
0.5s)
Defrosting will occur in
heating
mode. Compressor will
operate
Its the normal state
while indoor fan will stop
operation.
7URXEOHVKRRWLQJ
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Turn on the unit
and wait 1 minute
Use DC voltmeter
to measure the
voltage on the two
ends of electrolytic
capacitor
Voltage higher than 200V?
Y
Fault with the voltage
testing circuit on
control panel AP1
Replace the control
panel AP1
N
Measure the AC voltage between
terminalL and N on wiring board
XT(power supply)
Voltage within
210VAC~250VAC?
N
Shut down the power
and repair the power
supply to restore the
range
210VAC~250VAC
power on and
restart the unit
If the fault is
eliminated?
Y
Y
Shut down the power and wait 20 minutes;
or use DC voltmeter to measure the voltage
on the two ends of capacitor , until the
voltage is lower than 20V
N
Check the
connection of reactor
(L in the Electrical
Wiring Diagram)
If the wiring of
reactor Lis normal?
N
Connect the reactor
Laccording to Electrical Wiring Diagram correctly
Re-energize and
turn on the unit
Y
Replace the control
panel AP1
End
N
If the fault is
eliminated?
Y
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Energize and
switch on
IPM protection
occurs after the
machine has run for
a period of time?
Y
Use AC voltmeter
to measure the
voltage between
terminal L and N
on the wiring
board XT)
If the voltage
between terminal L
and N on wiring
board XT is within
210VAC~250VAC?
N
Check the supply
voltage and
restore it to
210VAC~250VAC
Y
Restart the unit. Before
protection occurs,
use DC voltmeter to
measure the voltage
between the two
ends of electrolytic
capacitor on control
panel AP1
Voltage between
the two ends of celectrolytic
capacitor is
higher than
250V
Y
Please confirm:
1. If the indoor and
outdoor heat
exchangers are
dirty? If they are
obstructed by other
objects which affect
the heat exchange
of indoor and
outdoor unit.
2. If the indoor and
outdoor fans are
working normally?
3. If the environment
temperature is too
high, resulting in
that the system
pressure is too high
and exceeds the
permissible range?
4. If the charge
volume of
refrigerant is too
much, resulting in
that the system
pressure is too
high?
5. Other conditions
resulting in that the
system pressure
becomes too high.
The connection
of capacitor C2
is loose.
Reconnect the
capacitor C2 according
to Electrical Wiring
Diagram. Then,
Restart the
unit.
Y
N
Stop the unit and
disconnect the power
supply. Wait 20 minutes,
or use DC voltmeter to
measure the voltage
between the two ends of
capacitor C2, until the
voltage is lower than 20V
Remove the wires
on the two ends of
capacitor C2. Then,
use capacitance
meter to measure
the capacitor C2.
Verify as per the
Parameters Sheet.
If capacitor
C2 is failed?
Replace the capacitor
C2. Then, energize
and start the unit.
Y
Replace the
control panel AP1
N
If there is any
abnormality
described above?
Y
Y
Connect the control panel
AP1 and compressor
COMP correctly according
to the Electrical Wiring
Diagram. Then, energize
and start the unit.
If the
resistance is
normal?
N
N
If the unit can
work normallv?
If the unit can
work normally?
Y
Y
N
Take corrective actions
according to Technical
Service Manual, and
then energize and start
the unit.
Replace the
control panel AP1
N
Use ohmmeter to
measure the resistance
between the three
terminals on compressor
COMP, and compare the
measurements with the
compressor resistance on
Service Manual.
Y
N
Stop the unit and
disconnect the power
supply. Then, check
the connection of
capacitor C2
according to Electrical
Wiring Diagram.
Refer to the
Electrical Wiring
Diagram and check
if the connection
between AP1 and
COMP is loose and if
the connection order
is correct.
If the connection
between AP1 and
COMP is unsecure
or the connection
order is wrong?
If the unit can
work
normally?
N
If the unit can
work
normally?
If the unit can
work normally?
Y
N
Y
Replace the
compressor
COMP
N
Use ohmmeter to
measure the resistance
between the two
terminals of compressor
COMP and copper tube.
Resistance higher
than 500MΩ?
Y
Replace the
control panel
AP1
END
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Overheat and high
temperature protection
Is outdoor ambient temperature higher than 53?
Y
Normal protection, please operate
it after the outdoor ambient temperature is normalized.
N
20 minutes after the complete
unit is powered off.
Is heat dissipation of the indoor unit
and outdoor unit abnormal?
Y
Improve the heat
dissipation environment of the unit
N
Does the outdoor fan work normally?
N
1. Check if the fan terminal OFAN
is connected correctly
2. Resistance between any two
terminals is measure by an ohm
gauge and should be less than 1K
Ohm.
Y
Replace the fan
capacitor C1
Replace the
control panel AP1
Replace the
outdoor fan
End
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Power on the unit
Is stop time of the compressor
longer than 3 minutes?
Restart it up after
3 minutes
N
Y
Does startup fail?
Y
Are the wires for the compressor connected
correctly? Is connection sequence right?
N
Connect the wires as
per the connection
diagram
Y
Replace the control panel AP1
N
If the fault is eliminated?
N
Replace the
compressor
Y
End
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Out of step occurs once the
unit is powered on.
Out of step occurs in
operation
Is stop time of the
compressor longer than
3 minutes?
Is the outdoor fan working
normally?
Is the outdoor unit blocked
by foreign objects?
Are the wires for the compressor connected
correctly? Is connection sequence right?
Is the connection made in clockwise
direction?
Replace the
control panel AP1
Connect the
wires correctly
Replace the control
panel AP1
If the fault is eliminated?
If the fault is eliminated?
Replace the
compressor
Replace the
compressor
End
End
Check if the fan terminal
OFAN is connected correctly
Replace the fan
capacitor C1
Replace the
outdoor fan
Remove foreign objects
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20 minutes after the
complete unit is
powered off
Is the terminal FA for the
electronic expansion valve
connected correctly?
Connect the
wires correctly
Resistances between the first four pins
close to the terminal hole and the fifth
pin are almost the same, less than 100
ohm.
Replace the electronic
expansion valve
If the fault is eliminated?
Replace the
control panel
AP1
If the fault is eliminated?
Coolant leakage, refilling
the coolant
End
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Start
Check wiring of the
reactor (L) of the
outdoor unit and the
PFC capacitor
Whether there is any
damage or
short-circuit?
Y
Replace it as per the
wiring diagram and
reconnect the wires
If the fault is eliminated?
N
Remove the PFC capacitor
and measure resistance
between the two terminals.
Is the resistance around zero?
N
Y
The capacitor is
short circuited and
the capacitor
should be replaced
Restart the unit
If the fault is eliminated?
Y
N
Disconnect the terminals for the
reactor and measure the resistance
between the two terminals of the
reactor by an ohm gauge
Whether there is any damage
or short-circuit?
N
Y
Replace the reactor
Restart the unit
If the fault is eliminated?
Y
N
Replace the control
panel AP1
N
Y
End
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Start
Y
Did the equipment operate
normally before the failure
occurs?
N
Check the wiring of the indoor and
outdoor units with reference to the
wiring diagram
Check wiring inside of
the indoor and outdoor
units
Y
Is the connection right?
N
N
The AP1 voltage
detection circuit
is at fault
Y
Correctly connect the
corresponding wires for
the indoor and outdoor
units with reference to
the wiring diagram
Are wires broken?
N
If the fault is eliminated?
N
Check the communication
circuit of the outdoor unit
If the fault is eliminated?
The communication
circuit is abnormal
Y
N
Replace the main board
AP1 of the outdoor unit
If the fault is eliminated?
N
Replace the main board
of the indoor unit
Y
Y
End
Y
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Start
Measure voltage at the
Test 10 position as
shown in the diagram
with a voltmeter
Value jumping
N
Y
Measure voltage at the
Test 15 position as
shown in the diagram
with a voltmeter
Y
Value jumping
N
Y
Fault with
outdoor unit
Measure voltage at the
Test 11 position as
shown in the diagram
with a voltmeter
Value jumping
End
N
Y
Measure voltage at the
Test 12 position as
shown in the diagram
with a voltmeter
N
Value jumping
Y
The communication
circuit of the outdoor
unit is normal
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Steps
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Procedure
1.Remove big handle
Before disassamble．
Remove 1 connection screw fixing big
handleand then removethe big handle.
big handle
2. Remove top cover
top cover
Remove 3 connection screws among
top cover plate, front panel and right
sideplate. Then remove top cover
plate.
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3.Remove grille and front panel
Remove connection screws between the front grille
and the front panel. Then remove the front grille.
Remove connection screws connecting the front
panel with the chassis and the motor support, and
then remove the front panel.
Grille
Panel
4.Remove axial flow blade
Axial flow blade
Remove the nut fixing the blade and then
remove the axial flow blade.
5.Remove right side plate
Remove connection screws connecting the right
side plate with the valve support and the electric
box. Then remove the right side plate.
Right side plate
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6.Remove electric box assy
Electric box assy
Remove the 2 screws fixing the cover of electric box. Lift to remove the cover. Loosen the
wire and disconnect the terminal. Lift to remove the electric box assy.
7.Remove 4-way valve assy
Unscrew the fastening nut of the 4-way Valve
Assy coil and remove the coil. Wrap the 4-
4-way Valve Assy
way Valve Assy with wet cotton and unsolder
the 4 weld spots connecting the 4-way Valve
Assy to take it out.(Note: Refrigerant should
be discharged firstly.) Welding process
should be as quickly as possible and keep
wrapping cotton wet all the time. Be sure not
to burn out the lead-out wire of compressor.
8.Remove capillary sub-assy
Unsolder weld point of capillary Sub-assy,
Capillary Sub-assy
valve and outlet pipe of condensator. Then
remove the capillary Sub-assy. Do not block
the capillary when unsoldering it. (Note: before unsoldering,discharge refrigerants
completely)
5HPRYDO3URFHGXUH
9.Remove motor and motor support
Motor support
Remove the 4 tapping screws fixing the motor.
Pull out the lead-out wire and remove the
motor. Remove the 2 tapping screws fixing
Motor
the motor support. Lift motor support to remove it.
10.Remove clapboard sub-assy
Clapboard Sub-Assy
Loosen the screws of the Clapboard Sub-Assy .
The Clapboard Sub-Assy has a hook on the
lower side. Lift and pull the Clapboard Sub-Assy
to remove.
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11.Remove Compressor
1
Remove the 2 screws fixing the gas valve.
Unsolder the welding spot connecting gas valve
and air return pipe and remove the gas valve.
(Note: it is necessary to warp the gas valve when
unsoldering the welding spot.) Remove the 2
screws fixing liquid valve. Unsolder the weld-
Liquid valve
ing spot connecting liquid valve and remove the
liquid valve.
Gas valve
2
Remove the 3 footing screws of the compressor
and remove the compressor.
Compressor
-)

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