LG Therma V AHBW Series - Inverter

- 56 -
- Red LED means error no. 10’s digit, and green LED means 1’s digit, and when red and green si-
multaneously blink, it means 100’s unit.
Ex) Inverter compressor IPM defect Error : error number 21
Error Code Description LED 1 (Red) LED 2 (Green)
21 Inverter compressor IPM defect
2times ◑ 1time ◑
AHBW056A0
AHBW076A0
AHBW096A0
AHBW126A0
AHBW146A0
AHBW166A0
Error
Code
Description Main Reasons
21**
DC Peak(IPM Fault) Inverter compressor drive IPM defect / inverter compressor defect
22** Max. CT(CT2) Increase of inverter compressor CT value
23** DC Link Low Volt. After inverter activation relay is ON, DC voltage recharge defect
26** DC Comp Position Error Inverter compressor error, causing initial activation failure
27** PFC Fault Error Error by overcurrent at inverter input
29** Comp Over Current Inverter compressor activation failure or increase of CT value
32** D-Pipe High(Inv.) Excessive rise of inverter compressor discharge temperature, causing compressor OFF
35** Low Pressure Error Excessive decrease of low pressure
41** Inv. D-Pipe Th Error(Open/Short) Inverter compressor discharge temperature sensor disconnection or short circuit
43** High Pressure Sensor(Open/Short) High pressure sensor disconnection or short circuit of inverter compressor
44** Outdoor air Th Error(Open/Short) Air temperature sensor disconnection or short circuit
45** Cond. Middle Pipe Th Error(Open/Short) Condenser Middle Pipe sensor disconnection or short circuit
46** Suction Pipe Th Error(Open/Short) Inverter compressor suction temperature sensor disconnection or short circuit
48** Cond. Out-Pipe Th Error(Open/Short) Condenser Out-Pipe sensor disconnection or short circuit
53**
Communication Error(PCB(Heater) ÷
PCB(Inverter))
PCB(Heater) unit does not receive signal from PCB(Inverter)
60** EEPROM Error(Outdoor) PCB(Inverter) EEPROM error
61** Cond. Middle Pipe High EEV connector diplaced/poor EEV assembly
62** Heatsink Error(High) PCB(Inverter) heat generation, causing the rise of heatsink temperature
73** Overcurrent (Peak) detected at inverter input Error by overcur’rent detection at inverter input
Main PCB assembly(Inverter)