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Main PCB assembly(Inverter)
- Red LED means error no. 10's digit, and green LED means 1's digit, and when red and green
simultaneously blink, it means 100's unit.
Ex) Inverter compressor IPM defect Error : error number 21
Error Code
Description
21
Inverter compressor IPM defect
ZHBW056A0
ZHBW076A0
ZHBW096A0
Error
Description
Code
21**
DC Peak(IPM Fault)
22**
Max. CT(CT2)
23**
DC Link Low Volt.
24**
High Pressure Error
26**
DC Comp Position Error
27**
PFC Fault Error
28
DC Link High Volt
29**
Comp Over Current
32**
D-Pipe High(Inv.)
35**
Low Pressure Error
41**
Inv. D-Pipe Th Error(Open/Short)
43**
High Pressure Sensor(Open/Short)
44**
Outdoor air Th Error(Open/Short)
Cond. Middle Pipe Th Error
45**
(Open/Short)
46**
Suction Pipe Th Error(Open/Short)
47
Const-D-Pipe Sensor Error
52****
PCB Communication Error
Communication Error(PCB(Heater) ÷
53**
PCB(Inverter))
54*
Open and Reverse Phase Error
60**
EEPROM Error(Outdoor)
61**
Cond. Middle Pipe High
62**
Heatsink Error(High)
67**
Fan Lock Error
73**
AC Input Instant over Current Error
114**
Injection In TH Error (Open/Short)
115**
Injection Out TH Error (Open/Short)
LED 1 (Red)
LED 2 (Green)
2times ◑
1time ◑
ZHBW126A0
ZHBW146A0
ZHBW166A0
Inverter compressor drive IPM defect / inverter compressor defect
Increase of inverter compressor CT value
After inverter activation relay is ON, DC voltage recharge defect
High pressure exceeds the limit of high pressure switch
Inverter compressor error, causing initial activation failure
Error by overcurrent at inverter input
After inverter activation relay is ON, DC voltage recharge defect
Inverter compressor activation failure or increase of CT value
Excessive rise of inverter compressor discharge temperature, causing
compressor OFF
Excessive decrease of low pressure
Inverter compressor discharge temperature sensor disconnection or
short circuit
High pressure sensor disconnection or short circuit of inverter
compressor
Air temperature sensor disconnection or short circuit
Condenser Middle Pipe sensor disconnection or short circuit
Inverter compressor suction temperature sensor disconnection or short
circuit
Const-D-Pipe Sensor disconnection or short circuit
Checking the communication state between Main PCB and Inverter PCB
PCB(Heater) unit does not receive signal from PCB(Inverter)
Prevention of phase unbalance and prevention of reverse rotation of
constant-rate compressor
PCB(Inverter) EEPROM error
EEV connector diplaced/poor EEV assembly
PCB(Inverter) heat generation, causing the rise of heatsink temperature
Outdoor BLDC Fan lock
Error by overcur'rent detection at inverter input
Injection In sensor disconnection or shot circuit
Injection Out sensor disconnection or shot circuit
- 72 -
ZHBW128A0
ZHBW148A0
ZHBW168A0
Main Reasons
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Troubleshooting
