14SEER Unitary Products (Ducted)
| NO. | LED1 (Yellow light) |
LED2 (Green light) | Questions | Answers |
| 1 | OFF | slow flash | Normal | Unit standby |
| 2 | OFF | ON | Normal | Unit is running |
| 3 | Flash 2 times for every 8s | slow flash | T3 Condenser Temperature sensor error | ① Make sure the coil temperature sensor is well connected; ② Replace the coil temperature sensor; ③ Repalce the main control PCB. |
| 4 | Flash 3 times for every 8s | slow flash | T4 Outdoor Ambient Temperature sensor error | |
| 5 | Flash 8 times for every 8s | slow flash | T5 Discharge Temperature sensor error | |
| 6 | Flash 6 times for every 8s | slow flash | Low pressure protection | ① Repair the leakage & charge refrigerant ② Remove the dirty and open the gas valve ③ Replace PCB or low pressure switch ④ Repair the heat exchanger |
| 7 | Flash 1 times for every 8s | slow flash | High pressure protection | ① Discharge the refrigerant & vacuum, recharge the refrigerant ② Remove the dirty and open the liquid valve ③ Replace PCB or high pressure switch ④ Repair the heat exchanger |
| 8 | Flash 9 times for every 8s | slow flash | T3 high temperature protection | ① Remove the dirty and open the liquid valve ② Discharge the refrigerant & vacuum, recharge the refrigerant ③ Replace PCB |
| 9 | Flash 5 times for every 8s | slow flash | T5 high temperature protection | ① Remove the dirty and open the gas valve ② Repair the leakage & charge refrigerant ③ Discharge the refrigerant & vacuum, recharge the refrigerant ④ Replace PCB |
18SEER Inverter Unitary Products (Ducted)
| NO. | Error code | Questions | Answers |
| 1 | E4 | T4 Outdoor ambient temperature sensor error | ① Make sure the coil temperature sensor is well connected; ② Replace the coil temperature sensor; ③ Repalce the main control PCB. |
| 2 | E5 | T5 Discharge temperature sensor error | |
| 3 | E6 | T3 Condenser temperature sensor error | |
| 4 | E10 | EEPROM error | ① Power off and re-power on to see whether it is normal; ② If there is still abnormal replace the main control PCB. |
| 5 | E13 | High pressure sensor error | ① Make sure the HLP Pressure sensor is well connected; ② Replace the HLP Pressure sensor; ③ Repalce the main control PCB. |
| 6 | P1 | High pressure switch protection | ① Replace the High pressure switch; ② Remove dirty and keep the liquid pipe unobstructed ③ Discharge some refrigerant from the system ④ Discharge the refrigerant, vacuum, recharge refrigerant ⑤ Repalce the main control PCB. |
| 7 | P2 | Low pressure switch protection | ① Replace the Low pressure switch; ② Remove dirty and keep the gas pipe unobstructed ③ Charge some refrigerant into the system ④ Repalce the main control PCB. |
| 8 | P6 | IPM module protection | ① Power off and re-power on to see whether it is normal; ② If there is still abnormal replace the main control PCB. |
MINI-SPLITS
| NO. | Questions | Answers |
| 1 | Air Conditioner Can’t be Started Up | ① No power for air conditioner, or poor connection for the power plug ② Poor connection for wiring terminals ③ Electric leakage for air conditioner ④ Model selection for air switch is improper ⑤ Malfunction of remote controller |
| 2 | Poor Cooling for Air Conditioner | ① Set temperature is improper ② Rotation speed is set too low ③ Filter is blocked ④ Installation position for unit is improper ⑤ Refrigerant is leaking ⑥Malfunction of capillary ⑦Malfunction of fan motor ⑧Malfunction of compressor |
| 3 | Fan Motor Can’t Operate | ① Wrong wire connection, or poor connection ② Wires for main switch are loose ③ Fan capacitor is damaged ④ Power voltage is a little low or high ⑤ Motor of outdoor unit is damaged |
| 4 | Compressor Can’t Operate | ① Wrong wire connection, or poor connection ② Thermostat is damaged ③ Capacitor of compressor is damaged ④ Power voltage is low or high ⑤ Coil of compressor is burnt ouRefrigerant is leaking ⑥ Cylinder of compressor is blocked |
| 5 | Air Conditioner is Leaking water | Drainage duct is blocked |
| 6 | Abnormal Sound and Vibration | ① When turn on or turn off the unit, the panel and other parts will expand and there’s abnormal sound ② When turn on or turn off the unit,there’s abnormal sound due to flow of refrigerant inside air conditioner ③ Foreign objects inside the unit or there’re parts touching together inside the unit ④ Abnormal shake of compressor ⑤ Abnormal sound inside the compressor |
