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Max. C/T
22
WARNING
Before checking PCB(Inverter) or each outdoor electric parts, wait for 3 minutes after the power is off. When measuring at standby
state of power supply, after checking the measurement mode of the meter, be careful of the short-circuits with other parts.
n Error Diagnosis and Countermeasure Flow Chart
Is installation
condition normal?
Yes
Are the resistance
Between each phase and
insulation resistance of Inverter
compressor normal?
Yes
Is compressor
Wire connection
condition normal?
Yes
PCB Assembly 1
power connection normal?
Yes
Is input voltage normal?
Yes
PCB Assembly 1
normal?
Yes
Recheck power and installation condition
Cause of error
Input Over Current
1. Check Pipe clogging/distortion
2. Check Covering (Unit)
No
3. Check EEV connector assemble condition/normal
operation
4. Check refrigerant pressure
→ Reassemble or manage if abnormality found
1. Check resistance between each terminal of compressor
2. Check insulation resistance between compressor
No
terminal and pipe
→ Replace compressor if abnormality found
1. Check PCB Assembly 1 U,V,W connector
connection condition
No
2. Check wire disconnection and wiring
3. Check compressor terminal connection condition
(bad contact)
→ Reassemble if abnormality found
Check connection between PCB Assembly 1 and bridge
No
diode(misconnection, disconnection)
→ wiring again if abnormality found
No
Check
L~N phase is 230V 15%
→ Check connection condition and wiring if power is
abnormal
No
Check PCB Assembly 1 IPM normality
→ Replace inverter PCB assembly
- 87 -
Check point & Normal condition
1. Malfunction of Compressor
2. Blocking of Pipe
3. Low Voltage Input
4. Refrigerant, Pipe length, Blocked...
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Troubleshooting
