Gree Terra GWH12TB-D3DNA1A, Terra GWH18TC-D3DNA1A Service Manual
GREE Terra GWH18TC-D3DNA1A is a split-system air conditioner designed for efficient cooling and heating. This model features a powerful compressor and indoor and outdoor fan, allowing for precise temperature control. The service manual provides detailed information on installation, troubleshooting, and maintenance.
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Service Manual
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Indoor air flow: Super High
Pipe length:24.6ft
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Condition
Indoor:DB 80.6°F WB66.2
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Indoor air flow: Super High
Pipe length:24.6ft
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Compressor Frequency(Hz)
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6
5
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10
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Condition
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Indoor air flow: Super High
Pipe length:24.6ft
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Compressor Frequency(Hz)
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Condition
Indoor:DB 70°F
Indoor air flow: Super High
Pipe length:24.6ft
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Compressor Frequency(Hz)
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50
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1. Compensation function of input parameters
According to the structure of wall-mounting unit, considering the comfortability for operation, indoor ambient temperature when the compressor is at OFF status is higher than set temperature under heating mode.
2. Control of detecting the availability of parameters
For ensuring the safety and reliability of operation, please insert the outdoor discharge temperature sensor into the corresponding temperature sensor bushing to make sure that the control system can detect system discharge temperature accurately. Otherwise, the unit will stop operation and it displays malfunction of discharge temperature sensor (discharge temperature sensor hasn’t been inserted well), which can only be resumed by pressing ON/OFF button on remote controller. Basic functions:
3. Cooling mode
3.1 Working condition and process for cooling
3.1.1 If compressor is at OFF status, and ǒ T preset
-(T indoor amb.
̲ T indoor amb. compensation of cooling
Ǔ ≤0ºC(32ºF), the unit operates in cooling mode;
3.1.2 During cooling operation, if 0ºC(32ºF) ≤ T preset
-(T indoor amb.
̲ T indoor amb. compensation of cooling
3.1.3 During cooling operation, if 3ºC(37ºF) ≤ T preset
-(T indoor amb.
̲ T indoor amb. compensation of cooling
, the unit stops operation when reaching the temperature point in cooling.
3.2 Temperature setting range:
3.2.1 If T outdoor amb.
≥T cooling temperature(low temperature)
, the temperature setting range is 16-30ºC(61~86ºF) (cooling in room temperature);
3.2.2 If T outdoor amb.
<T cooling temperature(low temperature)
, the temperature setting range is 25-30ºC(77~86ºF). That is: the lower limit of set temperature for outdoor unit is 25ºC(77ºF).
4. Dry mode
4.1 Working conditioner and process for drying is same as that for cooling mode;
4.2 Temperature setting range is 16-30ºC(61~86ºF);
5. Fan mode
5.1 Compressor, outdoor fan and 4-way valve are all turned off;
5.2 Temperature setting range is 16-30ºC(61~86ºF).
6. Heating ode
6.1 Working conditioner and process of heating: (T indoor amb.
is the actual temperature detected by indoor ambient temperature sensor;
̲ T indoor amb. compensation of heating
is indoor ambient temperature compensation during heating operation).
6.1.1 If compressor is at OFF status, and T indoor amb.
̲ T indoor amb. compensation of heating
Ǔ -T preset
Ǔ ≤-1ºC(30ºF) , the unit operates in heating mode.
6.1.2 During heating operation, if 0ºC(32ºF)≤ ǒ (T indoor amb
.- ̲ T indoor amb. compensation of heating
)-T preset
Ǔ
6.1.3 During heating mode, if 2(35ºF) ≤ (T indoor amb.
- ̲ T indoor amb. compensation of heating
)-T preset
, the unit stops operation when reaching the temperature point in heating.
6.2 Under this mode, the temperature setting range is 16-30ºC(61~86ºF).
7. Defrosting control heating mode ˅
7.1 If it turns to defrosting time and it detected that the defrosting temperature is satisfied for 3mins successively, the unit turns into defrosting process.
7.2 Defrosting-starting: compressor stops operation and restart it up after 55s delayed,
7.3 Defrosting-ending: Compressor stops operation and it starts up after 55s delayed.
7.4 When any one of below defrosting-ending conditions is satisfied, the unit will quit from defrosting operation:
7.4.1 T outdoor tube
≥T quit temperature 1
for defrosting;
7.4.2 Defrosting operation time is reached T max.defrosting time.
8. Control of compressor
8.1Frequecny of compressor intangibly controls the frequency according to the relation between ambient temperature and set temperature, and the change speed of ambient temperature;
8.2 Under cooling, heating or drying mode, compressor will be started up after outdoor fan is started for 5s.
8.3 At the OFF status, stop operation because of protection and switchover to fan mode, the compressor stops operation immediately.
8.4 Under each mode: Once the compressor is started up, it can be stopped only after operation.
8.5 Under each mode, one the compressor is stopped, it can be restarted up only after 3min delayed
9. Control of outdoor fan
9.1 When turn off the unit by remote controller, stop operation because of protection or stop operation after reaching the temperature point, outdoor can stop operation only after the compressor is stopped for 1min;
9.2 Under fan mode: outdoor fan stops operation.
9.3 defrosting-starting: enter into defrosting. Outdoor fan stops operation after compressor stops for 50s.
9.4 Defrosting-ending: quit defrosting. When the compressor stops operation, the outdoor fan operates.
10. Control of 4-way valve
10.1 4-way valve status under cooling, drying and fan modes: OFF;
10.2 When the unit turned on and operated in heating mode, the 4-way valve is energized immediately.
10.3 If turn off unit or switch to other mode in heating mode, the 4-way valve is de-energized after the compressor stops for 2min;
10.4 When the unit is turned off because of each protection, the 4-way valve is de-energized after 4 mins delayed.
10.5 Defrosting-starting: enter into defrosting. After the compressor stops for 50s, the 4-way valve will be de-energized.
10.6 Defrosting-ending: quit defrosting. After the compressor stops for 50s, the 4-way valve is energized.
11. Freeze protection
11.1 Under cooling or drying mode, if it’s detected that T inner tube
<0 for 3min successively, the unit will stop operation due to freeze protection. If T limit temperature of freeze protection
<T inner tube
, and compressor stops for 3min, the complete can resume operation;
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11.2 Under cooling or drying mode, if T inner tube
<6, the operation frequency of compressor may increase or decrease;
11.2.1 If the unit is stopped because of freeze protection for 6 times successively, it can’t resume operation automatically and the malfunction will be displayed continuously, which can only be resumed by pressing ON/OFF button. During operation, if operation time of compressor is over, the times of stop operation because of freeze protection will be cleared. If turn off the unit or switch to fan/heating mode, malfunction and times of malfunction is eliminated immediately.
12. Overload protection
12.1 Overload protection under cooling or drying mode: If T overload stop operation temp. in cooling
≤T outdoor tube
, the unit stops operation because of overload in cooling; if T outdoor tube
< T overload limit-frequecny temp in cooling
and the compressor has stopped for 3min, the complete unit can resume operation.
12.2 Under cooling or drying mode, if T overload limit-frequecny temp. in cooling
≤T outdoor tube
, the frequency of compressor may increase or decrease;
12.3 Overload protection under heating mode: If T overload stop operation temp. in heating
≤T indoor tube
, the unit stops operation because of overload in heating; if T indoor tube
<T overload limit-frequecny temp. in heating
and the compressor has stopped for 3min, the complete unit can resume operation.
12.4 Under heating mode. If T overload limit-frequecny temp. in heating
≤T indoor tube
, operation frequency of compressor may increase or decrease;
12.5 If the unit is stopped because of overload protection for 6 times successively, it can’t resume operation automatically and the malfunction will be displayed continuously, which can only be resumed by pressing ON/OFF button. During operation, if operation time of compressor is over, the times of stop operation because of overload protection will be cleared. If turn off the unit, fan or switch to fan/heating mode, malfunction and times of malfunction is eliminated immediately.
13. Discharge temperature protection of compressor
13.1 If T stop operation temperature for discharge
≤T discharge
, the unit stops operation because of discharge protection; If T discharge
<T limit-frequecny temperature for discharge
and compressor has stopped for 3min, the complete unit can resume operation;
13.2 If T normal speed decrease-frequency for discharge
≤T discharge
, operation frequency of compressor may decrease or increase;
13.3 If the unit is stopped because of discharge protection of compressor for 6 times successively, it can’t resume operation automatically, which can only be resumed by pressing ON/OFF button. During operation, if operation time of compressor is over, the times of stop operation because of discharge protection will be cleared. If turn off the unit, or switch to fan/heating mode, malfunction and times of malfunction is eliminated immediately.
14. Current protection function
14.1 If 13A≤I
AC current, operation frequency of compressor may decrease or increase;
14.2 If 17A≤I
AC current,
the system will stop operation because of overcurrent; the complete unit can resume operation only after the compressor stops for 3min;
14.3 If the unit is stopped because of overcurrent for 6 times successively, it can’t resume operation automatically, which can only be resumed by pressing ON/OFF button. During operation, if operation time of compressor is over, the times of stop operation because of overcurrent protection will be cleared.
15. Voltage drop protection
During operation of compressor, if the voltage is decreasing quickly, the system may stop operation and voltage drop malfunction is caused. 3min later, the system will be restarted up automatically.
16. Communication malfunction
When it hasn’t received the correct signal from indoor unit for 3min, the unit will stop operation because if communication malfunction; If communication malfunction is eliminated and compressor has stopped for 3in, the complete unit can resume operation.
17. OPM module protection
After compressor is turned on, if the overcurrent happens for IPM module, or control voltage is too low because of abnormal causes, IPM will detect module protection signal immediately. Once it detected the module protection signal, the unit will stop operation because of module protection. If module protection is resumed and compressor has stopped for 3min, the complete unit will resume operation.
If the unit is stopped because of module protection for 3 times successively, the unit can resume operation automatically unless press
ON/OFF button. If the operation time for compressor is over, the times of stop operation because of module protection will be cleared.
18. Overheat protection of module
18.1 If T normal speed frequency-decreasing temp. of module
≤T module
, the operation frequency of compressor may decrease or increase;
18.2 If T stop operation temperature of module
≤T module
, the syste will stop operation for protection. If T module
<T frequency-limiting temperature of module
and compressor has stopped for 3min, the complete unit will resume operation;
18.3 If the unit is stopped because of overheating of compressor module for 6 times successively, it can’t resume operation automatically, which can only be resumed by pressing ON/OFF button. During operation, if operation time of compressor is over, the times of stop operation because of compressor overheating protection will be cleared. If turn off the unit, or switch to fan mode, times of malfunction is eliminated immediately.
19. Overload protection of compressor
19.1 If it detected that the overload switch for compressor is open for 3min successively, the complete unit will stop operation for protection;
19.2 If overload protection is resumed and compressor has stopped for 3min, the complete unit can resume operation;
19.3 If the unit stops operation because of overload protection for compressor for 3times successively, it can’t resume operation automatically, which can only be resumed by pressing ON/OFF button. After compressor has operated for 30min, overload protection times for compressor will be eliminated.
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Space to the wall
At least 5 8/9 inch
At least 118 inch
Space to the obstruction
Space to the wall
At least 5 8/9 inch
Space to the wall
At least 11 4/5 inch
Space to the obstruction
At least 11 4/5 inch
At least 78 3/5 inch
Space to the obstructio
Drainage pipe
Space to the obstruction
At least 19 2/3 inch
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Start installation
Preparation before installation
Read the requirements for electric connection select installation location
Prepare tools
Select indoor unit installation location
Install wall-mounting frame, drill wall holes
Connect pipes of indoor unit and drainage pipe
Connect wires of indoor unit
Bind up pipes and hang the indoor unit
Select outdoor unit installation location
Install the support of outdoor unit
(select it according to the actual situation)
Fix outdoor unit
Install drainage joint of outdoor unit
(only for cooling and heating unit)
Make the bound pipes pass through the wall hole and then
connect outdoor unit
Connect pipes of outdoor unit
Connect wires of outdoor unit
Neaten the pipes
Vacuum pumping and leakage detection
Check after installation and test operation
Finish installation
Note: this flow is only for reference; please find the more detailed installation steps in this section.
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1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
27
28
29
30
31
32
33
Malfunction and Status Display Table
Display of Malfunction of Indoor Unit
Name Malfunction
Type
Malfunction of Circuit for zero cross detection
Malfunction protection for jumper cap
No feedback from indoor motor
Display
Nixie
Tube
Status of LED Lamp
LED
Lamp for
Operation
LED Lamp for
Cooling
LED Lamp for
Heating
U8
C5
H6
Blinks for 17 times
Blinks for 15 times
Blinks for 11 times
Indoor ambient temp sensor has open or short circuit
Indoor evaporator temp sensor has open or short circuit
Liquid valve temp sensor has open or short circuit
Gas valve temp sensor has open or short circuit
Module temp sensor has open or short circuit
Outdoor ambient temp sensor has open or short circuit
Outdoor inlet pipe temp sensor of condenser has open or circuit (for commercial use)
Outdoor middle pipe temp sensor of condenser has open or short circuit
Outdoor outlet pipe of condenser has open or short circuit (for commercial use)
Outdoor discharge temp sensor has open or short circuit
Communication malfunction of indoor and outdoor units
Malfunction of circuit for detecting phase current of compressor
Demagnetization protection of compressor
Malfunction of voltage drop of DC bus bar
Module temperature protection
Lack of refrigerant or block protection for the system (not applicable to residential air conditioner)
Malfunction of charging for capacitor
High pressure protection for the system
Low pressure protection for the system reserved
Lock of compressor (for commercial air conditioner)
Reset of drive module (for commercial air conditioner)
Overspeed (for commercial air conditioner)
Malfunction
of hardware
Malfunction of
Outdoor Unit
Status of LED
Lamp
Yellow
LED
Lamp
Red
LED
Lamp
Blinks for
19 times
Blinks for
22 times
P7
A5
Blinks for
Blinks for
A7
3 times
4 times
Blinks for
18times
Blinks for
5 times
E6
Blinks for 6 times
U1 Blinks for
HE
Blinks for
14 times
U3
P8
Blinks for
20 times
Blinks for
19 times
Blinks for
10 times
PU
E1
E3
Blinks once
Blinks for 3 times
LE / /
Blinks for
17 times
/
Blinks for
10 times
Blinks for 6 times
Blinks for 5 times
Blinks for 7 times
Blinks for 9 times
P0 / /
LF / /
PF / /
P9 / /
/
/
/
/
AC contactor protection (for commercial air conditioner)
Temperature drift protection(for commercial air conditioner)
Sensor connection protection (for commercial air conditioner)
Communication malfunction for drive board(for commercial air conditioner)
Thermal overload protection for compressor
Non-match between indoor and outdoor units
Malfunction of memory chip
PE / /
Pd / /
P6
H3
LP
Blinks for 16 times
/
Blinks for
3 times
EE Blinks for
Blinks for
8 times
Blinks for
16 times
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6HUYLFH0DQXDO
38
45
62
63
64
47
48
49
50
51
52
53
34
35
36
Wrong connection of communication wire or malfunction of expansion valve (free match)
Malfunction of current detection for the complete unit
Wrong connection of communication wire or status of detecting malfunction of expansion valve (free match)
Refrigerant reclaiming mode
39 Oil return under defrosting or heating
40 Nominal cooling or heating (capacity test code)
41 Max. cooling or heating (capacity test code)
42 Middle cooling or heating(capacity test code)
43 Min. cooling or heating(capacity test code)
44 Failure of startup of compressor
High discharge temperature protection of compressor
Overcurrent protection for the complete unit
Overcurrent protection for the complete unit
Desynchronizing of compressor
Lack/reverse phase protection of
Module current protection (IPM protection)
Overlow voltage protection for DC bus bar
Overhigh voltage protection for DC bus bar
55 Overhigh power protection (not for outdoor
56
57
58
59
Abnormal reversing of 4-way valve
Frequency limit/decrease for current protection of the complete unit
Frequency limit/decrease for current protection of the module (phase current)
Frequency limit/decrease for high discharge temperature
60 Frequency limit/decrease for freeze protection
Display is controlled by remote control
61
66
67
69
Frequency limit/decrease for overload
Frequency limit/decrease for module temperature protection
Oil return in cooling
Cold air prevention
Reading malfunction of EEPROM
Reaching temperature for turning on the unit
Malfunction of outdoor fan dn / / / dd / / /
Blinks
E7 times
Fo
Blinks once
Blinks once
H1
P1
P2
P3
P0
Lc
/
/
/
/
/
/
/
/
Blinks once
/
/
/
Blinks for
11 times
Blinks twice
E4
Blinks for 4 times
Blinks for 8 times
E5
Blinks for 5 times
Blinks for
7 times
Blinks for
6 times
Blinks for
5 times
P5
H7
Ld
H5
PL
PH
/ /
Blinks for
11 times
HC
L9
Blinks for 20 times
U7
Blinks for
20 times
F8
8 times
En / /
Blinks for
15 times
Blinks for
7 times
/
Blinks for
5 times
Blinks for
21 times
Blinks for
6 times
/
Blinks for
4 times
Blinks for
12 times
Blinks for
13 times
Blinks for
14 times
Blinks for
9 times
Blinks for
9 times
FH
Blinks twice
Blinks twice
F6
F7
Blinks for
6 times
Blinks for
7 times
Blinks for
6 times
Blinks once
Blinks twice
Blinks for 4 times
Blinks for 3 times
Blinks for 11 times
E9
Blinks for 9 times
Blinks for
3 times
Blinks for
11 times
Blinks for 8 times
Blinks for
13time s
Blinks for 14 times
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If malfunction occurs,corresponding code will display and the unit will resume normal until protection or
malfunction disappears.
Indicator display of outdoor unit
Yellow indicator blinks for once
Yellow indicator blinks for twice
Yellow indicator blinks for 3 times
Yellow indicator blinks for 4 times
Yellow indicator blinks for 5 times
Yellow indicator blinks for 6 times
Yellow indicator blinks for 7 times
Yellow indicator blinks for 8 times
Red indicator blinks for once
Red indicator blinks for twice
Red indicator blinksfor 3 times
Red indicator blinks for 4 times
Red indicator blinks for 5 times
Red indicator for 6 times
Red indicator blinks for 7 times
Red indicator blinks for 8 times
Green indicator does not blink
Compressor stars (normal)
Defrosting (normal display of indoor unit)
Anti-freezing protection (normal display of indoor unit)
IPM protection
Overcurrent protection
Overload protection
Exhaust protection
Overlod protection of compresoor
Cooling (dehumidify) or heating current dropped frequency current.
Exhaust temp. dropped frequency temp.
Tube temp. dropped frequency temp.
T
tube-in
dropped frequency temp.
Outdoor condenser temp. sensor mal.
Outdoor ambient temp. sensor mal.
Outdoor exhaust temp. sensor mal.
Starting at temp. does not reach
Communication is abnormal
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Analysis or processing of some of the malfunction display:
1. Compressor discharge protection operation; malfunction of compressor; malfunction of protection relay; malfunction of discharge sensor; outdoor temperature too high.
Processing method: refer to the malfunction analysis in the above section.
2. Low voltage overcurrent protection
Possible reason: Sudden drop of supply voltage.
3. Communic ation malfun ction
Processing method: Check if communic ation signal cable is connected reliably.
4. Sensor open or short circuit
Processing method: Check whethers ensor is normal, connected with the corre sponding position on the controller and if damage of lead wire is found.
5. Compressor over load protection
Possible reasons: insufficient or too much refrigrant; blockage of capillary an dincrease of suction temp.; improper running of compressor, burning in or stuck of bearing, damage of discharge valve; malfunction of protector.
Processing method: adjust refrige rant amount; replace the capillary; replace the compressor; use univers al meter to check if the
.
6. System malfun ction
Overload protection.When tube temperature(Check the temperature of outdoor heat exchanger when cooling and check the temperature of indoor heat exchanger when heating) is too high, protection will beactivated.
Please refer to the malfunction analysis in the previous section for handling method .
7. IPM module protection
Processing method:Once the module malfunction happens,if it persists for a long time and can not be self-canceled, cut off the power and turn off the unit,and then re-energize the unit again after about 10 min.After repeating the procedure for sever times, if the malfunction still exists,replace the module.
(2)Models:18/24K:
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NO.
Malfunction
Name
1
2
3
4
5
6
7
High pressure protection of system
Antifreezing protection
High discharge temperature protection of compressor
Overcurrent protection
Communication
Malfunction
High temperature resistant protection
Internal motor (fan motor) do not operate
Dual-8
Code
Display
Display Method of Indoor Unit
Display Method of
Outdoor Unit
(Indicator has 3 kinds of display status and they will be displayed
Indicator Display (during circularly every 5s.)
□OFF blinking, ON 0.5s and OFF 0.5s) ■Illuminated ƿ Blink
Operation
Indicator
Cool
Indicator
Heating
Indicator
D5 D6 D16 D30
(D40) (D41) (D42) (D43)
E1
E2
E4
E5
E6
E8
H6
OFF 3s and blink once
OFF 3S and blink twice
OFF 3S and blink 4 times
OFF 3S and blink 5 times
OFF 3S and blink 6 times
OFF 3S and blink 8 times
OFF 3S and blink
11 times
A/C status Possible Causes ƶ ƿ ƿ ƿ
Ƶ ƶ Ƶ ƶ
Ƶ ƶ Ƶ ƿ ƶ Ƶ ƿ ƶ ƶ ƶ ƶ ƿ
Ƶ ƶ Ƶ Ƶ
During cooling and drying operation, except indoor fan operates, all loads stop operation.
During heating operation, the complete unit stops.
During cooling and drying operation, compressor and outdoor fan stop while indoor fan operates.
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.
During cooling and drying operation, compressor and outdoor fan stop while indoor fan operates. During heating operation, all loads stop.
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).
1. Supply voltage is unstable;
2. Supply voltage is too low and load is too high;
3. Evaporator is dirty.
During cooling operation, compressor stops while indoor fan motor operates. During heating operation, the complete unit stops.
Refer to the corresponding malfunction analysis.
During cooling operation: compressor will stop while
Refer to the malfunction analysis
(overload, high temperature indoor fan will operate. During heating operation, the complete unit stops.
resistant).
Internal fan motor, external fan motor, compressor and electric heater stop operation,guide louver stops at present location.
1. Bad contact of DC motor feedback terminal.
2. Bad contact of DC motor control end.
3. Fan motor is stalling.
4. Motor malfunction.
5. Malfunction of mainboard rev detecting circuit.
8
Malfunction protection of jumper cap
9
Indoor ambient temperature sensor is open/short circuited
10
Overcurrent protection of phase current for compressor
C5
F1
P5
OFF 3S and blink
15 times
OFF 3S and blink once
OFF 3S and blink
15 times ƶ ƿ ƶ ƶ
Wireless remote receiver and button are effective, but can not dispose the related command
During cooling and drying operation, indoor unit operates while other loads will stop; during heating operation, the complete unit will stop operation.
During cooling and drying operation, compressor will stop while indoor fan will operate;
During heating operation, the complete unit will stop operation.
1. No jumper cap insert on mainboard.
2. Incorrect insert of jumper cap.
3. Jumper cap damaged.
4. Abnormal detecting circuit of mainboard.
1. Loosening or bad contact of indoor ambient temp. sensor and mainboard terminal.
2. Components in mainboard fell down leads short circuit.
3. Indoor ambient temp. sensor damaged.(check with sensor resistance value chart)
4. Mainboard damaged.
Refer to the malfunction analysis (IPM protection, loss of synchronism protection and overcurrent protection of phase current for compressor.
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NO.
Malfunction
Name
11
12
13
14
15
Indoor evaporator temperature sensor is open/short circuited
Outdoor ambient temperature sensor is open/short circuited
Outdoor condenser temperature sensor is open/short circuited
Outdoor discharge temperature sensor is open/short circuited
Dual-8
Code
Display
Display Method of Indoor Unit
Display Method of
Outdoor Unit
(Indicator has 3 kinds of display status and they will be displayed circularly every 5s.)
Indicator Display (during blinking, ON 0.5s and OFF 0.5s)
□OFF
■Illuminated ƿ Blink
Operation
Indicator
Cool
Indicator
Heating
Indicator
D5 D6
(D40) (D41)
D16
(D42)
D30
(D43)
OFF 3S and blink twice
F2
F3
OFF 3S and blink
3 times ƶ ƶ ƿ Ƶ
A/C status Possible Causes
AC stops operation once reaches the setting temperature. Cooling, drying: internal fan motor stops operation while other loads stop operation; heating: AC 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.
During cooling and drying operating, compressor stops while indoor fan operates;
During heating operation, the complete unit will stop operation
Outdoor temperature sensor hasnt been connected well or is damaged. Please check it by referring to the resistance table for temperature sensor)
F4
F5
F6
OFF 3S and blink
4 times
OFF 3S and blink
5 times ƶ ƶ ƿ ƶ ƶ
Ƶ ƶ ƶ ƿ ƿ ƿ ƿ
During cooling and drying operation, compressor stops while indoor fan will operate;
During heating operation, the complete unit will stop operation.
Outdoor temperature sensor hasnt been connected well or is damaged. Please check it by referring to the resistance table for temperature sensor)
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
All loads operate normally, while operation frequency for compressor is decreased
Refer to the malfunction analysis
(overload, high temperature resistant)
16
17
18
19
Limit/ decrease frequency due to overload
Decrease frequency due to overcurrent
Decrease frequency due to high air discharge
Voltage for
DC bus-bar is too high
Malfunction of complete units current detection
F8
F9
PH
U5
OFF 3S and blink for 6 times
OFF 3S and blink
8 times
OFF 3S and blink
9 times
OFF 3S and blink
11 times
OFF 3S and blink
13 times
Ƶ
Ƶ
Ƶ
Ƶ ƶ ƶ
Ƶ ƶ ƶ Ƶ ƶ ƿ ƶ Ƶ ƿ Ƶ
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
All loads operate normally, while operation frequency for compressor is decreased
Overload or temperature is too high;
Malfunction of electric expansion valve (EKV)
During cooling and drying operation, compressor will stop while indoor fan will operate;
During heating operation, the complete unit will stop operation.
1. Measure the voltage of position
L and N on wiring board (XT), if the voltage is higher than 265VAC, turn on the unit after the supply voltage is increased to the normal range.
2 . I f t h e A C i n p u t i s n o r m a l , 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)
During cooling and drying operation, the compressor will stop while indoor fan will operate;
During heating operating, the complete unit will stop operation.
Theres circuit malfunction on outdoor units control panel AP1, please replace the outdoor units control panel AP1.
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6HUYLFH0DQXDO
NO.
Malfunction
Name
20 Defrosting
Display Method of Indoor Unit
Display Method of
Outdoor Unit
(Indicator has 3 kinds of display status and they will be displayed circularly every 5s.) A/C status Possible Causes
Dual-8
Code
Display
Indicator Display (during blinking, ON 0.5s and OFF 0.5s)
Operation
Indicator
Cool
Indicator
Heating
Indicator
□OFF
■Illuminated ƿ Blink
D5
(D40)
D6
(D41)
D16
(D42)
D30
(D43)
H1
OFF 3S and blink once
Defrosting will occur in heating mode. Compressor will operate while indoor fan will stop operation.
Its the normal state
21
Static dedusting protection
H2
OFF 3S and blink twice
/
22
Overload protection for compressor
H3
23
System is abnormal
24
IPM protection
25
PFC protection
26
Desynchronizing of compressor
H7
27
Decrease frequency due to high temperature resistant during heating operation
H4
H5
HC
H0
OFF 3S and blink
3 times
OFF 3S and blink
4 times
OFF 3S and blink
5 times
OFF 3S and blink
6 times
OFF 3S and blink
7 times
OFF 3S and blink
10 times ƶ ƿ ƿ ƶ
Ƶ ƶ Ƶ Ƶ ƶ ƿ ƶ Ƶ ƶ Ƶ ƿ ƿ ƶ ƿ Ƶ ƿ
During cooling and drying operation, compressor will stop while indoor fan will operate;
During heating operation, the complete unit will stop operation.
During cooling and drying operation, compressor will stop while indoor fan will operate;
During heating operation, the complete unit will stop operation.
During cooling and drying operation, compressor will stop while indoor fan will operate;
During heating operation, the complete unit will stop operation.
During cooling and drying operation, compressor will stop while indoor fan will operate;
During heating operation, the
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)
Refer to the malfunction analysis
(overload, high temperature resistant)
Refer to the malfunction analysis (IPM protection, loss of synchronism protection and overcurrent protection of phase current for compressor.
Refer to the malfunction analysis complete unit will stop operation.
During cooling and drying operation, compressor will stop while indoor fan will operate;
During heating operation, the complete unit will stop operation.
All loads operate normally, while operation frequency for compressor is decreased
Refer to the malfunction analysis (IPM protection, loss of synchronism protection and overcurrent protection of phase current for compressor.
Refer to the malfunction analysis
(overload, high temperature resistant)
Ƶ ƶ ƿ ƿ
28
Failure startup
LC
29
Malfunction of phase current detection circuit for compressor
U1
OFF 3S and blink
11 times
OFF 3S and blink
13 times ƶ ƿ ƶ ƿ ƶ ƿ Ƶ ƶ
During cooling and drying operation, compressor will stop while indoor fan will operate;
During heating operation, the complete unit will stop operation.
During cooling and drying operation, compressor will stop while indoor fan will operate;
During heating operation, the complete unit will stop
Refer to the malfunction analysis
Replace outdoor control panel AP1
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6HUYLFH0DQXDO
NO.
30
31
32
33
34
35
36
37
38
Malfunction
Name
EEPROM malfunction
Charging malfunction of capacitor
Malfunction of module temperature sensor circuit
Dual-8
Code
Display
Display Method of Indoor Unit
Display Method of
Outdoor Unit
(Indicator has 3 kinds of display status and they will be displayed circularly every 5s.)
Indicator Display (during blinking,
ON 0.5s and OFF 0.5s)
□OFF
■Illuminated ƿ Blink
Operation
Indicator
Cool
Indicator
Heating
Indicator
D5
(D40)
D6
(D41)
D16
(D42)
D30
(D43)
EE
OFF 3S and blink
15 times ƶ ƶ ƶ Ƶ
A/C status
During cooling and drying operation, compressor will stop while indoor fan will operate;
During heating operation, the complete unit will stop
Possible Causes
Replace outdoor control panel
AP1
PU
OFF 3S and blink
17 times ƶ Ƶ ƶ Ƶ
During cooling and drying operation, compressor will stop while indoor fan will operate;
During heating operation, the complete unit will stop
Refer to the part three—charging malfunction analysis of capacitor
P7
OFF 3S and blink
18 times ƶ ƶ Ƶ ƿ
During cooling and drying operation, compressor will stop while indoor fan will operate;
During heating operation, the complete unit will stop
Replace outdoor control panel
AP1
Module high temperature protection
Malfunction of voltage dropping for
DC bus-bar
Voltage of
DC bus-bar is too low
Limit/ decrease frequency due to high temperature of module
The four-way valve is abnormal
Zero- crossing malfunction of outdoor unit
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19 times
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OFF 3S and blink
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During cooling operation, compressor will stop while
After the complete unit is deenergized for 20mins, check indoor fan will operate; During heating operation, the complete unit will stop whether the thermal grease on
IPM Module of outdoor control whether the radiator is inserted tightly. If its no use, please replace control panel AP1.
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
During cooling and drying operation, compressor will stop while indoor fan will operate;
During heating operation, the complete unit will stop
1. Measure the voltage of position
L and N on wiring board (XT), if the voltage is higher than 150VAC, 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)
All loads operate normally, while operation frequency for compressor is decreased
Discharging after the complete unit is de-energized for 20mins, check whether the thermal grease on
IPM Module of outdoor control
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If this malfunction occurs during heating operation, the complete unit will stop operation.
During cooling operation, compressor will stop while indoor fan will operate; during heating,the complete unit will stop operation.
whether the radiator is inserted tightly.
If its no use, please replace control panel AP1.
1.Supply voltage is lower than
AC175V;
2.Wiring terminal 4V is loosened or broken;
3.4V is damaged, please replace
4V.
Replace outdoor control panel
AP1
39
Limit/ decrease frequency due to antifreezing
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All loads operate normally, while operation frequency for compressor is decreased
Poor air-return in indoor unit or fan speed is too low
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Start
Is the wiring
terminal between temperature sensor and the controller loosened or
poor ly contacted?
yes
Insert the temperature sensor tightly no no
M alfunction is eliminated.
Is there short circuit due to tri-pover
of the pa rts?
yes
Make the parts upright no no
Is the te mperature sensor normal according to the
Resistance Table?
Malfunction is eliminated.
yes yes no
Replace the controller with one of the same model no
Replace it with a temperature sensor of the same model
Malfunction is removed.
yes yes
End
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Start
Pull the blade by hand under de-energization status
Whether the blade can operate smoothly
No
No
Yes
Check whether the wiring terminal between indoor fan and main board is loose
No
Energize and restart upthe unit, test whether the voltage beween motor terminal 1 and 2 is 280~310VDC
Yes
No
No
Yes
No
Test whether the voltage bewween motor terminal 2 and 3 is 15VDC
No
No
Yes
Test whether there's voltage signal beween motor terminal 2 and 4
No
Yes
It's the malfunction of motor. Replace the motor.
No
Adjust the motor and blade assembly to let the motor can operate smoothly
Is malfunction eliminated
Reinsert the wiring terminal of indoor fan
Is malfunction eliminated
It's the malfunction of main board. Replace the main board with the same model
Yes
Yes
Is malfunction eliminated
It's the malfunction of main board. Replace the main board with the same model
Yes
Is malfunction eliminated
It's the malfunction of main board. Replace the main board with the same model
Yes
Yes
Is malfunction
eliminated
End
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C5 is displayed on the unit.
Is there jumper cap on the controller?
No
Install a matching jumper cap.
Yes
No
Is the malfunction eliminated?
Is the jumper cap inserted incorrectly or improperly?
Yes
Re-insert the jumper cap
No
No
Replace the jumper cap
Is the malfunction eliminated?
Yes
Is the malfunction eliminated?
No
The mainboard is defined abnormal ; replace it
Yes
Yes
End
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Poor contact of any line may lead to communication malfuntion.
Is there incorrect match between the main board and the display panel or between the indoor and outdoor boards?
Is there incorrect connection?
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Outdoor unit:
(1) Capacity charging malfunction (outdoor unit malfunction) (AP1 below is control board of outdoor unit)
Main detection point:
● Detect if the voltage of L and N terminal of wiring board is between 210AC-240AC by alternating voltage meter;
● Is reactor (L) well connected? Is connection wire loosened or pull-out? Is reactor (L) damaged "
Malfunction diagnosis process:
Turn on the unit and wait 1 minute
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Use DC voltmeter to measure the voltage on the two ends of electrolytic capacitor
Voltage higher than 200V?
N
Measure the AC voltage between terminal L and N on wiring board
XT(power supply)
Y
Fault with the voltage testing circuit on control panel AP1
Replace the control panel AP1
Voltage within
210VAC~250VAC?
Y use DC voltmeter to measure the voltage on the two ends of capacitor (test3), until the voltage is lower than 20V
N
Shut down the power and repair the power supply to restore the range
210VAC~250VAC power on and restart the unit
N
Check the connection of reactor
(L in the Electrical
Wiring Diagram)
If the wiring of reactor L is normal?
Y
Replace the control panel AP1
N
Connect the reactor
Laccording to Electrical Wiring Diagram correctly
Re-energize and turn on the unit
N
If the fault is eliminated?
If the fault is eliminated?
Y
Y
End
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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?
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.
Refer to the
Electrical Wiring
Diagram and check
if the connection between AP1 and
COMP is loose and if the connection order is correct.
Y
Voltage between the two ends of celectrolytic capacitor is higher than
250V
N
Stop the unit and
disconnect the power
supply. Then, check
the connection of capacitor C2 according to Electrical
Wiring Diagram.
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.
Restart the unit. Before protection occurs, use DC voltmeter to measure the voltage between the two ends of electrolytic capacitor on control panel AP1
The connection of capacitor C2 is loose.
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
N
Y
N
If capacitor
C2 is failed?
N
If there is any abnormality described above?
N
Y
Y
Replace the capacitor
C2. Then, energize and start the unit.
Replace the control panel AP1
Take corrective actions according to Technical
Service Manual, and then energize and start the unit.
Replace the control panel AP1
N
Check the supply voltage and restore it to
210VAC~250VAC unit.
If the unit can
Reconnect the capacitor C2 according to Electrical Wiring
Diagram. Then,
Restart the
If the unit can work normallv?
If the unit can work normally?
N work normally?
If the unit can work normally?
N
Y
Y
Y
Y
If the connection between AP1 and
COMP is unsecure or the connection order is wrong?
Y
Connect the control panel
AP1 and compressor
COMP correctly according to the Electrical Wiring
Diagram. Then, energize and start the unit.
If the unit can work normally?
Y
Use ohmmeter to measure the resistance between the three terminals on compressor
COMP, and compare the measurements with the compressor resistance on
Service Manual.
Use ohmmeter to measure the resistance between the two terminals of compressor
COMP and copper tube.
If the resistance is normal?
N
Resistance higher than 500MΩ?
Y
Replace the control panel
AP1
Replace the compressor
COMP
N
END
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(3) Diagnosis for anti-high temperature, overload protection (AP1 below is control board of outdoor unit)
Main detection point:
● If the outdoor ambient temperature is in normal range;
● If the indoor and outdoor fan is running normal;
● If the radiating environment of indoor and outdoor unit is well.
Malfunction diagnosis process:
Anti-high temperature, overload protection
If the outdoor ambient temperature is higher than 53 ºC?
N
After the unit deenergized for 20min
Y
Normal protection, please use it after improve the outdoor ambient temperature
If the radiating of outdoor and indoor unit is well?
N
If the indoor and outdoor fan work well?
Y
Replace control board
AP1
Y
Improve the radiating environment of unit
N
1. Check if fan terminal
OFAN is connected well
2. Test if resistance value of any two terminals is less than 1k with ohmic meter
Replace fan capacitor C1
Replace outdoor fan
End
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(4) Diagnosis for failure start up malfunction (AP1 below is control board of outdoor unit)
Main detection point:
● If the compressor wiring is correct?
● If the stop time of compressor is enough?
● If the compressor is damaged?
● If the refrigerant charging is too much?
Malfunction diagnosis process:
Energize the unit and start it
If the stop time of compressor is more than 3min?
Y
If the compressor wire COMP(UVW) is well connected and connection sequence is correct
Y
If the refrigerant charging is too much?
Y
Charge the refrigerant according to service manual
N
N
Improve the connection situation of control board AP1 and compressor COMP, connect it with wiring diagram
N
If the stop time is not enough and the high and low pressure of system is not balance , please start it after 3min
Does the unit start up normally?
Does the unit start up normally?
N
Replace control board AP1
If malfunction is removed?
N
Replace the compressor
End
Y
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(5) Diagnosis for compressor synchronism (AP1 below is control board of outdoor unit)
Main detection point:
● If the system pressure is over-high?
● If the work voltage is over-low?
Malfunction diagnosis process:
Synchronism occurred during operation
Synchronism after energize the unit and start it
N
If the stop time of compressor is more than
3min
Y
If the compressor wire COMP(UVW) is well connected, the connection sequence forwards to clockwise direction?
N
Connect wire well
Y
Y
Replace control board
AP1
Remove malfunction?
N
Replace compressor
End
If the outdoor fan works normally?
Y
If the radiating of unit is well?
N
If the input voltage of unit is normal?
Y
If the refrigerant is too much?
N
Replace control board
AP1
N
Check if the fan terminal OFAN is connected well
Y
Improve the radiating of unit (clean heat exchanger and increase ventilation)
N
Start to run until the power resume normal voltage
Y
Charge the refrigerant with service manual
Remove malfunction?
N
Replace compressor
Y
End
Replace fan capacitor C1
Replace outdoor fan
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(6) Diagnosis for overload and discharge malfunction (AP1 below is control board of outdoor unit)
Main detection point:
● If the electron expansion valve is connected well? Is the expansion valve damaged?
● If the refrigerant is leakage?
● If the overload protector is damaged?
Malfunction diagnosis process:
After the unit de-energized for 20min
If the overload protector SAT is well connected?
Y
Under ambient temperature, test the resistance of overload protector with ohmic
N
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N
Replace overload protector SAT
Y
If the wiring terminal FA of electron expansion is well connected?
Y
The resistance value of firs t 4 l e a d fo ot an d th e fif th lead fo ot is similar, less than 100
Replace EKV coil of electron expansion valve
N
Connect wire well with wiring diagram
Remove malfunction?
N
Check refrigerant, if there is leakage, please refer to specification
Remove malfunction?
N
Replace control board
AP1
End
Y
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(7) PFC (correction for power factor) malfunction (outdoor unit malfunction) (AP1 below is control board of outdoor unit)
Main detection point:
● Check if reactor (L) of outdoor unit and PFC capacity are damaged.
Malfunction diagnosis process:
Start
Check the connection wire of reactor (L) of outdoor unit and
PFC capacity
If there is damaged short circuit
Y
Replace connection wire with circuit diagram
N
Remove PFC capacity and test resistance of two terminals
If the resistance value is 0
N
Cut the terminal of reactor, test the resistance between two terminals of reactor with ohmic meter
Y
Capacity is short circuit and replace it
N
Re-energize the unit and start it
N
If there is damaged short circuit
Y
N
Replace the reactor
Reenergize the unit and start it
Replace control board
AP1
N
If the malfunction is removed?
If the malfunction is removed?
Y
If the malfunction is removed?
Y
Y
End
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(8) Communication malfunction (AP1 below is control board of outdoor unit)
Main detection point:
● Check if the connection wire and the built-in wiring of indoor and outdoor unit is connected well and no damaged;
● If the communication circuit of indoor mainboard is damaged? If the communication circuit of outdoor mainboard (AP1) is damaged
Malfunction diagnosis process:
Start
Y
If the unit is operation normal before malfunction
Check builtin wiring of indoor and outdoor unit
Malfunction of circuit is detected with control board
AP1 voltage
Y
If the malfunction is removed?
N
If the wiring is damaged?
N
Check communication circuit of outdoor unit
Y
Y
Problem of communication circuit
N
Replace indoor board
Y
N
Replace outdoor mainboard AP11
If the malfunction is removed?
Y
End
N
N
Check connection wire of indoor and outdoor unit with circuit diagram
Connection correct?
N
Check connection wire of indoor and outdoor unit with circuit diagram
If the malfunction is removed?
Y
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1. Before disassembling the unit
Procedure
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Before disassembling the unit.
2. Remove filter a Open the panel. b Loosen the clasps on filter, push the filter inward and then pull it upward, then the filter can be removed.
3.Remove guide louver a Remove the axial bushing of big guidelouver. axial bushing
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Steps b Remove the rotating shaft of big guidelouver from the groove, slightly bend thebig guide louver to remove it.
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4.Remove panel a Loosen the clamps of the panel to remove the panel. big guide louver axial bushing small guide louver
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Steps b panel, to remove the display.
5.Remove front case a Remove the screws fixing electric box cover 2, to remove the electric box cover
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Procedure electric box cover 2 screw b Remove the screws fixing front panel, loosen the clamps, to remove the front panel. screw clamp front panel
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6.Remove swing fan blade a Loosen the clamps fixing swing connecting rod, to remove the swing connecting rod.
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7.Remove electric box sub-assy a Remove the indoor tube temp. sensor.
swing fan blade heat exchanger thermistor b Remove the screws fixing earth wire, to remove the earthwire.
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Steps c to remove the cover.
Procedure d Remove every wiring terminals, and remove the electric box cover sub-assy.
7.Remove evaporator sub-assy pipe clamp auxiliary piping electric box cover electric box cover sub-assy screw a Remove the screws fixing connection pipe clamp, to remove the connection pipeclamp.
screw screw
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Steps Procedure b Remove the screws fixing evaporator sub-assy, slightly regulate the tube, to remove the evaporator sub-assy. evaporator sub-assy auxiliary piping
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8.Remove cross fan blade and motor a motor, to remove the motor. b to remove the motor. up&down swing motor left&right swing motor
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Steps c Remove the screws fixing motor clamp, to remove the motor clamp.
Procedure d Remove the cross fan blade and motor.
e Remove the shafting bearing cushionrubber base bearing cushion rubber base screw motor clamp f bladeandmotor, and then remove the motor. cross fan blade motor
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Steps
1. Before disassembling the unit
Before disassembling the unit.
2. Remove filter a Open the panel.
Procedure b Loosen the clasps on filter, push the filter inward and then pull it upward, then the filter can be removed.
3.Remove guide louver a Remove the axial bushing of big guidelouver. axial bushing
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Steps b Remove the rotating shaft of big guide louver from the groove, slightly bend thebig guide louver to remove it.
Procedure c Remove the axial bushing of small guide louver. d Remove the rotating shaft of small guide louver from the groove, slightly bend the small guide louver to remove it.
4.Remove panel a Loosen the clamps of the panel to remove the panel.
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Steps b panel, to remove the display.
5.Remove front case a Remove the screws fixing electric box cover 2, to remove the electric box cover
2.
Procedure electric box cover 2 screw b Remove the screws fixing front panel, loosen the clamps, to remove the front case. screw clamp front case
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Steps
6.Remove swing fan blade a Loosen the clamps fixing swing connecting rod, to remove the swing connecting rod.
Procedure clamp swing connecting rod b remove the swing fan blade.
clamp
7.Remove electric box sub-assy a Remove the indoor tube temp. sensor.
swing fan blade heat exchanger thermistor b Remove the screws fixing earth wire, to remove the earth wire.
earth wire screw
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Steps c to remove the cover.
Procedure d Remove every wiring terminals, and remove the electric box cover sub-assy.
7.Remove evaporator sub-assy pipe clamp auxiliary piping electric box cover electric box cover sub-assy screw a Remove the screws fixing connection pipe clamp, to remove the connection pipe clamp.
screw screw
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Steps Procedure b Remove the screws fixing evaporator sub-assy, slightly regulate the tube, to remove the evaporator sub-assy. evaporator sub-assy auxiliary piping
8.Remove cross fan blade and motor a motor, to remove the motor. b to remove the motor.
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Steps c Remove the screws fixing motor clamp, to remove the motor clamp.
Procedure d Remove the cross fan blade and motor.
e Remove the shafting bearing cushion rubber base bearing cushion rubber base screw motor clamp f blade and motor, and then remove the motor. cross fan blade motor
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Steps
1. Before disassembly of the unit
Before disassembling the unit.
2. Remove filter a Open the panel.
Procedure b Loosen the clasps on filter, push the filter inward and then pull it upward, then the filter can be removed. air filter hooks panel air filter
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Steps
3. Remove the panel a Remove the screws fixing display on the panel, to remove the display.
Procedure screw display b Along the groove fixing front panel, slide the rotor shaft outward to remove the front panel.
panel c Remove the panel.
4. Remove electric box cover
Unscrew a screw of electric box cover with screwdriver. Then take out the electric box cover.
screw electric box cover
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Steps
5. Remove Axial bush a Remove the axial bush of horizontal louver to remove the axial bush.
Procedure b Remove Axial bush
6. Remove front case a Remove the screw cover of front case, unscrew the 8 screws of front case with screwdriver.
Axial bush hook
Axial sleeve b Take out the front case to separate the front case with bottom assembly.
front case
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Steps
7. Remove electric box a Remove Temperature Sensor; Twist off the earthing screw fixing the evaporator.
Procedure temperature sensor screw earth wire electric box cover 2 b Remove the screw of electric box.Take out the electric box cover to separate the electric box cover 2.
c Remove every wiring terminals, and remove the screws fixing electric box to remove the electric box sub-assy.
electric box
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Steps
8. Remove evaporator sub-assy a Loosen the clasps connecting the water tray and chassis, and then remove the water tray.
Procedure water tray b Remove the screws fixing connection pipe clamp, to remove the connection pipe clamp.
pipe clamp c Remove the screws fixing evaporator sub-assy, slightly regulate the tube, to remove the evaporator sub-assy.
evaporator sub-assy screw
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Steps Procedure srews srews
6HUYLFH0DQXDO d Turn over the indoor unit and adjust the pipe line to the position as shown by the broken line.
e Lift up the evaporator, and then remove the evaporator.
9. Remove the cross-flow louver and motor a
Remove the 2 screws of step motor with screwdriver, and remove the step motor.
evaporator screws
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Steps b Remove screws fixing cross flow blade and motor.
Procedure c Remove the motor sub-assy.
Cross blow blade Fan motor d Pull out the plug of ring of bearing.
Ring of Bearing
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1. Before disassembly
2. Remove top cover
Remove the screws connecting top cover, left and right side plate, as well as panel, to remove the top cover.
3. Remove handle
Remove the screws connecting handle and right side plate, to remove the handle.
top cover handle
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4. Remove panel and grille
Remove the screws fixing panel, to remove the panel.
Remove the screws connecting panel grille and panel, loosen the clamp, to remove the panel grille.
grille panel
5. Remove valve cover
Remove the screw fixing valve cover, to remove the cover.
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6. Remove left side plate
Remove the screws fixing left side plate and condenser support board, to remove the left side plate.
7. Remove cross fan blade
Remove the screw nut fixing cross fan blade, remove the gasket and spring cushion, to remove the cross fan blade.
left side plate cross fan blade
8. Remove right side plate
Remove the screws fixing right side plate and valve support, to remove the right side plate.
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9. Remove electric box assy
Remove screws fixing electric box assy and mid-isolation board, loosen the bonding tie, pull off the wiring terminal, lift to remove the electric box assy. electric box cover electric box assy
10. Remove electric reactor
Remove the screws fixing electric reactor, to remove the electric reactor.
11. Remove motor and motor support
Remove the four tapping screws fixing motor, pull out the contact tag of motor wiring, to remove the motor.
Remove the two tapping screws fixing motor support and chassis, lift to remove the motor support.
motor support motor
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12. Remove mid-isolation board
Remove the screws connecting mid-isolation board, chassis and condenser assy, to remove the mid-isolation.
13. Remove four-way valve assy
Welding cut the spot weld of four-way valve assy, compressor air suction/discharging valve and condenser pipe outlet, lift to remove the four-way valve assy. (Note: release the refrigerant before welding cutting.) mid-isolation board four-way valve assy
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14. Remove compressor
Remove the three feet screw nuts fixing compressor, to remove the compressor.
compressor
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15. Remove big and small valve assy
Remove screws connecting condenser assy and chassis, to remove the condenser assy.
Remove the screws fixing big and small valve, to remove the valves.
condenser assy small valve big valve
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Steps
1. Remove big handle,valve cover and top cover
Procedure
Remove the screw connecting the big handle and right side plate, and then remove the big handle.
Remove the screw connecting the valve cover and right side plate, and then remove the valve cover.
Remove the screws connecting the top cover with outer case, right side plate and left side plate; lift the top cover upwards to remove it.
2. Remove grille and outer case
Remove the 4 screws connecting the grille and outer case, and then remove the panel grille.
grille big handle valve cover top cover
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Steps Procedure
Remove the screws connecting the outer case with motor support, isolation plate and chassis; lift the outer case upwards; loosen the clasps of outer case with right side plate and left side plate, and then remove the outer case.
3. Remove right& left side plate
Remove the screws connecting the right side plate with electric box assy, valve support, chassis and condenser side plate, and then remove the right side plate.
outer case right side plate
Remove the screws connecting the left side plate with chassis, and then remove the left side plate.
left side plate
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Steps
4. Remove axial flow blade
Procedure
Remove the nut fixing axial flow blade and then remove the blade.
axial flow fan motor support
Remove the 6 screws fixing the motor and then remove the motor.
Remove the 2 screws connecting the motor support and chassis, and then loosen the stopper to remove the motor support.
5. Remove electric box
Remove the screws fixing the electric box sub-assy; loosen the wire bundle; pull out the wiring terminals and then pull the electric box upwards to remove it.
fan motor electric box
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Steps
6. Remove the soundproof sponge
Procedure
Tear off the sticking stripe and then remove the soundproof sponge.
7. Remove isolation plate
Remove the 2 screws connecting the isolation plate and condenser side plate; remove the 3 screws connecting the isolation plate and chassis, and then remove the isolation plate.
isolation plate
8. Remove 4-way valve assy
Unsolder the welding joints connecting the 4-way valve assy with capillary sub-assy, compressor and condenser; remove the 4-way valve.
Note:
Before unsoldering the welding joint, wrap the 4-way valve with a wet cloth completely to avoid damage to the valve caused by high temperature.
soundproof sponge
4-way valve assy
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Steps
9. Remove compressor
Procedure
Remove the 3 foot nuts fixing compressor and then lift the compressor upwards to remove the compressor and damping cushion.
Note:
Keep the ports of discharge pipe and suction pipe from foreign objects.
10. Remove
condenser sub-assy
Remove the screws connecting the support
(condenser) and condenser assy,and then remove the support(condenser).
support
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Remove the 2 screws fixing the condenser and chassis, and then lift the condenser upwards to remove it.
chassis subassy
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Steps
1. Remove big handle,valve cover and top cover
Procedure
Remove the screw connecting the big handle and right side plate, and then remove the big handle.
Remove the screw connecting the valve cover and right side plate, and then remove the valve cover.
2.Remove top panel
Remove the screws connecting the top panel with the front panel and left&right side plate, and then remove the top panel.
3.Remove front side panel
Loosen the screws connecting the front side panel and chassis. Remove the front side panel. front side panel
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Steps
4.Remove grille and panel
Twist off the screws connecting the grille and panel, and then remove the grille.
Procedure
Twist off the screws connecting the panel, chassis and motor support with screwd-river, and then remove the panel.
5.Remove right side plate grille panel
Twist off the screws connecting the right side plate and chassis, valve support and condenser, and then remove the right side plate.
right side plate
6.Remove axial flow blade
Twist off the nuts on blade with wrench and then remove the axial flow blade.
axial flow blade
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Steps
7.Remove electric box
Procedure
Twist off the screws on electric box, cut off the tieline with scissors or pliers, pull out the wiring terminal, pull it upwards to remove the electric box.
Twist off the screws on electric box (fireproofing) with screwdriver, and then remove the electric box (fireproofing).
8.Remove motor
Twist off the tapping screws fixing the motor, pull out the pin of leading wire for motor and then remove the motor.
motor
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(fireproofing)
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Steps
9.Remove motor support
Twist off the tapping screws fixingthe motor support, pull it upwardsand then remove the motor support.
Procedure motor support
10.Remove isolation sheet
Twist off the screws connecting isolation sheet and end plate of condenser and chassis, and then remove the isolation sheet.
isolation sheet
11.Remove 4-way valve
Unsolder the pipeline between compressor, condenser, gas and liquid valve, and then remove the 4-way valve. (note: release all refrigerant before unsoldering).
4-way valve
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Steps
12.Remove gas valve and liquid valve
Procedure
Twist off the 2 bolts fixing the valve sub-assy.
Unsolder the soldering joint between gas valve and air-return pipe and then remove the gas valve.(note: when unsoldering the soldering joint, wrap the gas valve with wet cloth completely to avoid the damage to valve, and release all refrigerant completely at first). Unsolder the soldering joint between liquid valve and connection pipe of liquid valve, and then remove the liquid valve.
13.Remove valve support
Twist off the screws connecting valve support and chassis, and then remove the valve support.
14.Remove compressor
Twist off the 3 foot nuts on compressor and then remove the compressor.
gas valve liquid valve valve support compressor
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Steps
15.Remove left side plate
Procedure
Twist off the screws connecting the left side plate and chassis with screwdriver, and then remove the left side plate.
left side plate
16.Remove chassis and condenser
Pull it upwards to separate the chassis and condenser.
condenser chassis
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Pipe
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Pipe
Smooth surface
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The length is equal damaged surface crack uneven thickness
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If the product you bought is equipped with wired controller, please refer to the following introductions of wired controller.
1 Displaying Part
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Fig1.1.1 Outline of wired controller
1.1 LCD Display of Wired Controller
Fig.1.1.2 LCD display
1.2 Instruction to LCD Display
No.
Symbols Description
1
9
10
11
6
7
2
3
4
5
8
Swing function
Air exchange function (this function is yet unavailable for this unit).
Sleep function (Only sleep 1).
Each kind of running mode of indoor unit
(auto mode)
Cooling mode
Dry mode
Fan mode
Heating mode
Defrosting function for the outdoor unit.
Gate-control function (this function is yet unavailable for this unit).
Lock function.
13
14
15
16
17
18
No.
12
Table 1.1
Symbols
SHIELD
Turbo
Description
Shield functions (Button operation, temperature setting,
On/Off operation,Mode setting are disabled by the remote monitoring system.)
Turbo function state
MEMORY
SAVE
Memory function (The indoor unit resumes the original setting state after power failure and then power recovery).
It blinks under on state of the unit without operation of any button.
Energy-saving function (this function is yet unavailable for this unit).
Ambient/setting temperature value
E-HEATER Electric auxiliary heating function.
19 BLOW Blow function.
20
21 QUIET
Timing value.
Quiet function (two types: quiet and auto quiet)
(this function is yet unavailable for this unit).
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2 Buttons
2.1 Layout of Buttons
2.2 Functions of Buttons Table 2.1
No.
1
2
6
3
Name Function
Enter/Cancel Function selection and cancellation.
▲
▼
Running temperature setting of the indoor unit, range:16~30 o
C(61~86°F).
Timer setting, range:0.5-24 hr.
Fan Setting of the high/middle/low/auto fan speed.
4
5
Mode
Function
Setting of the Cooling/Heating/Fan/Dry/Auto mode of the indoor unit.
Switchover among the functions of Turbo/Save/E-heater/Blow etc..
7
8
4+2
Timer
On/Off
▲+Mode
Timer setting.
Turn on/off the indoor unit
Press them for 5s under off state of the unit to enter/cancel the Memory function(If memory is set, indoor unit after power failure and then power recovery will resume the original setting state. If not, the indoor unit is defaulted to be off after power recovery. Memory off is default before delivery.).
3+6
2+6
Fan+▼
▲+▼
By pressing them at the same time under off state of the unit, will be displayed on the wired controller for the cooling only unit, while will be displayed on the wired controller for the cooling and heating unit.
Upon startup of the unit without malfunction or under off state of the unit,press them at the same time for 5s to enter the lock state, in which case,any other buttons won’t respond the press. Repress them for 5s to quit this state.
3 Operation Instructions
3.1 On/Off
Press On/Off to turn on the unit and turn it off by another press.
Note: The state shown in Fig.3.1.1 indicates the “Off” state of the unit after power on. The state shown in Fig.3.1.2 indicates the
“On” state of the unit after power on.
Fig.3.1.1 “Off” State Fig.3.1.2 “On” State
3.2 Mode Setting
Under ON state of the unit, press the Mode to switch the operation modes as the following sequence: Auto–Cooling–Dry–Fan–Heating.
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3.3 Temperature Setting
Press ▲or ▼ to increase/decrease the preset temperature. If pressing either of them continuously, the temperature will be increased or decreased by 1°C every 0.5s,as shown in Fig.3.3.1.
In the Cooling, Dry, Fan or Heating mode, the temperature setting range is 16°C~30°C(61°F~86°F).
In the Auto mode, the setting temperature is unadjustable.
Fig.3.3.1
Fig.3.4.1
3.4 Fan Setting
Under the “On” state of the unit, press Fan and then fan speed of the indoor unit will change circularly as shown in Fig.3.4.1.
Low Middle High
3.5 Timer Setting
Under on-state of the unit, Press Timer button to set timer off of the unit. Under off-state of the unit, press Timer button to set timer on of the unit in the same way.
• Timer on setting:
Under off-state of the unit without timer setting, if Timer button is pressed, LCD will display xx. Hour,with ON blinking. In this case,
• Timer off setting:
Under on-state of the unit without timer setting, if Timer button is pressed, LCD will display xx. Hour,with OFF blinking. In this case,
• Cancel timer:
After setting of timer, if Timer button is pressed, LCD won’t display xx. Hour so that timer setting is canceled.
Timer off setting under the “On” state of the unit is shown as Fig.3.5.1.
Fig.3.5.1 Timer off Setting under the “On” State of the Unit
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Timer on setting under the “Off” state of the unit is shown as Fig.3.5.2.
Fig.3.5.2 Timer on Setting under the “Off” State of the Unit
Timer range: 0.5-24hr. Every press of ▲or ▼ will make the set time increased or decreased by 0.5hr. If either of them is pressed continuously, the set time will increase/ decrease by 0.5hr every 0.5s.
3.6 Swing Setting
Swing On: Press Function under on state of the unit to activate the swing function. In this case, will blink.After that,press Enter/Cancel
Swing Off: When the Swing function is on, press Function to enter the Swing setting interface, with blinking. After that, press Enter/
Cancel to cancel this function. Swing setting is shown as Fig.3.6.1.
Fig.3.6.1 Swing Setting
Notes: ķ . Sleep, Turbo or Blow setting is the same as the Swing setting.
ĸ later.
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3.7 Sleep Setting
Sleep on: Press Function under the On state of the unit till the unit enters the Sleep setting state. After that, press Enter/Cancel to
Sleep off: When the Sleep function is activated, press Function to enter the Sleep setting status. After that, press Enter/Cancel to cancel this function.
In the Cooling or Dry mode, the temperature will increase by 1°C(2°F) after the unit runs under Sleep1 for 1hr and 1°C(2°F) after another
1hr.After that, the unit will run at this temperature.
In the Heating mode, the temperature will decrease by 1°C(2°F) after the unit runs under Sleep 1 for 1hr and 1°C(2°F) after another 1hr.
After that, the unit will run at this temperature.
Sleep setting is shown as Fig.3.7.1.
Fig.3.7.1. Sleep Setting
3.8 Turbo Setting
Turbo function: The unit at the high fan speed can realize quick cooling or heating so that the room temperature can quickly approach the setting value.
In the Cooling or Heating mode, press Function till the unit enters the setting.
When the Turbo function is activated, press Function to enter the Turbo setting status and then press Enter/Cancel to cancel this function. Turbo function setting is as shown in Fig.3.8.1.
Fig.3.8.1 Turbo Setting
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3.9 E-heater Setting
E-heater (auxiliary electric heating function): In the Heating mode, E-heater is allowed to be turned on for improvement of effciency.
Once the wired controller or the remote controller enters the Heating mode, this function will be turned on automatically.
Press Function in the Heating mode to enter the E-heater setting interface and then press Enter/Cancel to cancel this function.
Press Function to enter the E-heater setting status, if the E-heater function is not activated, and then press Enter/Cancel to activate it.
The setting of this function is shown as Fig.3.9.1 below:
Fig.3.9.1 E-heater Setting
3.10 Blow Setting
Blow function: After the unit is turned off, the water in evaporator of indoor unit will be automatically evaporated to avoid mildew.
In the Cooling or Dry mode, press Function till the unit enters the Blow setting status and then press Enter/Cancel to active this function.
When the Blow function is activated, press Function to the Blow setting status and then press Enter/Cancel to cancel this function.
Blow function setting is as shown in Fig.3.10.1
Fig.3.10.1 Blow Setting
Notes: ķ . When the Blow function is activated, if turning off the unit by pressing On/Off or by the remote controller, the indoor fan will run at the low fan speed for 2 min, with “BLOW” displayed on the LCD. While, if the Blow function is deactivated, the indoor fan will be turned off directly.
ĸ . Blow function is unavailable in the Fan or Heating mode.
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3.11 Other Functions a. Lock
Upon startup of the unit without malfunction or under the “Off” state of the unit, press ▲ and ▼ at the same time for 5s till the wired controller enters the Lock function. In this case, LCD displays .
After that, repress these two buttons at the same time for 5s to quit this function.
Under the Lock state, any other button press won’t get any response.
b. Memory
Memory switchover: Under the “Off” state of the unit, press Mode and ▲ at the same time for 5s to switch memory states between memory on and memory off. When this function is activated, Memory will be displayed. If this function is not set, the unit will be under the
“Off” state after power failure and then power recovery.
Memory recovery: If this function has been set for the wired controller, the wired controller after power failure will resume its original running state upon power recovery. Memory contents: On/Off, Mode, set temperature, set fan speed and Lock function.
4 Installation and Dismantlement
4.1 Connection of the Signal Line of the Wired Controller
● Open the cover of the electric control box of the indoor unit.
● Let the single line of the wired controller through the rubber ring.
● Connect the signal line of the wired control to the 4-pin socket of the indoor unit PCB.
● Tighten the signal wire with ties.
● The communication distance between the main board and the wired controller can be up to 20m(65.62ft.)
(the standard distance is 8m(26.25ft.))
4.2 Installation of the Wired Controller
PVC Pipe
1 2 3 4 5
No.
Name
Fig.4.1 Accessories for the Installation of the Wired Controller
1
Socket box embedded in the wall
2
Soleplate of the
Wired Controller
3
Screw
M4X25
4
Front Panel of the
Wired Controller
Table 4.1
5
Screw
ST 2.9X6
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3 4
6 5
7
8 9 10
Fig.4.2
Fig.4.2 shows the installation steps of the wired controller, but there are some issues that need your attention.
with electricity during the whole installation.
2) Pull out the four-core twisted pair line from the installation holes and then let it go through the rectangular hole behind the soleplate of the wired controller.
4) Insert the four-core twisted pair line into the slot of the wired controller and then buckle the front panel and the soleplate of the wired controller together.
CAUTION!
Please pay special attention to the followings during the connection to avoid the malfunction of the air conditioning unit due to electromagnetic interference.
ķ . Separate the signal and communication lines of the wired controller from the power cord and connection lines between the indoor and outdoor unit, with a minimum interval of 20cm(7 7/8 inch), otherwise the communication of the unit will probably work abnormally.
ĸ . If the air conditioning unit is installed where is vulnerable to electromagnetic interference,then the signal and communication lines of the wired controller must be the shielding twisted pair lines.
4.3 Dismantlement of the Wired Controller
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5 Errors Display
If there is an error occurring during the operation of the system, the error code will be displayed on the LCD, as show in Fig.5.1. If multi errors occur at the same time, their codes will be displayed circularly.
Note: In event of any error, please turn off the unit and contact the professionally skilled personnel.
Fig.5.1
Error
Error
Code
Error
Return air temperature sensor open/ short circuited evaporator temperature sensor open/ short circuited
Indoor unit liquid valve temperature sensor open/short circuited
Indoor gas valve temperature sensor open/ short circuited
IPM temperature sensor open/short circuited
Outdoor ambient temperature sensor open/ short circuited
Outdoor unit condenser mid-tube temperature sensor open/short circuited
Discharge temperature sensor open/ short circuited
F1
F2 b5 b7
P7
Communication line misconnected or expansion valve error
F3 Pump-down
F4
Drive board communication error
Compressor overheating protection
Indoor and outdoor units unmatched
Jumper error
Indoor and outdoor communication error E6 Compressor startup failure
DC bus under-voltage protection PL High discharge temperature protection
Error
Code
P6
H3
LP dn
E7
Fo
C5
H1
Lc
E4
E8 DC bus over-voltage protection
Compressor phase current sensing circuit error
PH
U1
Overload protection
Whole unit over-current protection
Compressor demagnetization protection HE Over phase current protection
PFC protection Hc Compressor desynchronizing
E5
P5
H7
IPM Temperature Protection
Over-power protection
System charge shortage or blockage protection
Capacitor charging error
High pressure protection
Low pressure protection
Compressor stalling
P8 IPM Current protection
L9
F0
PU
E1
E3
LE
Compressor phase loss/reversal unit protection
F requency restricted/reduced with whole current protection
Frequency restricted/reduced with
IPM current protection
Frequency restricted/reduced with high discharge temperature
Frequency restricted/reduced with antifreezing protection
Frequency restricted/reduced with overload protection
Over-speeding LF
IPM temperature protection
Drive board temperature sensor error PF Indoor unit full water error
AC contactor protection
Temperature drift protection
Sensor connection protection
H5
Ld
F8
En
F9
FH
F6
EU
P9 Anti-freezing protection
PE AC input voltage abnormal
E9
E2
PP
Pd Whole unit current sensing circuit error U5
DC bus voltage drop error
Outdoor fan 1 error protection
Outdoor fan 2 error protection
U3
L3
LA
4-way valve reversing error
Motor stalling
PG motor zero-crossing protection
U7
H6
U8
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Key features
- Split-system AC
- Cooling & Heating
- Remote control
- Turbo Mode
- Variable speed fan
- Precise temperature control
- Compressor frequency control