Trouble shooting
FAILURE | STATE OF | TROUBLE | POSSIBLE REASONS | |
CODE | LED | SHOOTING | ||
| ||||
1 |
| Faulty defrost sensor Te | Sensor disconnected, or broken, or short circuit | |
2 |
| Faulty sensor Tao | Sensor disconnected, or broken, or short circuit | |
3 |
| Faulty sensor Ts | Sensor disconnected, or broken, or short circuit | |
4 |
| Faulty sensor Td | Sensor disconnected, or broken, or short circuit | |
|
|
| Over current of the system, or broken of the current | |
5 |
| Input overcurrent | sensor,or malfunction with indoor or outdoor fan | |
|
|
| motors, or faulty PCB. | |
|
| Abnormal communication Wrong connection, or the wires be disconnected, or | ||
6 |
| between indoor and outdoor | wrong address setting of indoor units, or faulty | |
|
| units | PCB, or faulty power supply | |
|
|
| High pressure switch is disconnected, or high | |
|
| System high pressure | pressure switch worked, or Tc too high and faulty | |
9 |
| outdoor fan motor when cooling, or faulty indoor | ||
| protection | |||
|
| fan motors when heating, or refrigerant | ||
|
|
| ||
|
|
| overabundance | |
|
|
| Low pressure switch is disconnected, or low | |
10 |
| System low pressure | pressure switch worked, or Te too low and faulty | |
| protection | outdoor fan motors when heating, or faulty indoor | ||
|
| |||
|
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| fan motor when cooling, or refrigerant shortage | |
|
|
| IPM over current, or short circuit, or IPM | |
11 |
| IPM protection | temperature too high, or IPM input voltage too | |
|
|
| low,or faulty SPDU. | |
12 |
| EEPROM fault | Faulty outdoor unit PCB | |
|
| Over hot protection of | Serious lack of refrigerant of the system, or the | |
13 |
| ambient temperature too high, or PMVs be | ||
| compressor | |||
|
| blocked | ||
|
|
| ||
15 |
| DC fan motor fault | Fan is blocked, or the terminal is disconnected | |
| from the PCB | |||
|
|
| ||
16 |
| Faulty | Coil of | |
| switching on | outdoor PCB | ||
|
| |||
17 |
| Faulty sensor Tc | Sensor disconnected, or broken, or short circuit | |
21 |
| Faulty sensor Toci | Sensor disconnected, or broken, or short circuit | |
|
| Abnormal communication | Communication cables broken, or not be well | |
25 |
| between main PCB and | connected, or faulty main PCB, or faulty SPDU | |
|
| SPDU |
| |
26 |
| Compressor be locked | Faulty compressor or SPDU | |
27 |
| Compressor vibration too big Faulty compressor | ||
28 |
| Compressor lose position | Faulty SPDU | |
29 |
| Faulty compressor start | Faulty compressor or SPDU | |
30 |
| Faulty position checking | Faulty SPDU | |
31 |
| circuit | Faulty compressor or SPDU | |
| Compressor broken | |||
Take off the plastic valve cover, you can find the LEDs near to the communication terminal. Symbol
means the LED is ON. Symbol 
means the LED is OFF.
15
