Troubleshooting Guide
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Only training and service purposes.
291
Inverter compressor over
current
Error
No.
Error Type
Error Point
Main Reasons
Inverter compressor input
current is over 30A
1. Overload operation
(Pipe clogging/Covering/EEV defect/Ref.
overcharge)
2. Compressor damage(Insulation
damage/Motor damage)
3. Input voltage low
4. Inv. PCB damage
n
Error Diagnosis and Countermeasure Flow Chart
Is installation
condition normal?
No
Yes
Recheck power and installation condition
1. Check Pipe clogging/distortion
2. Check Covering (Indoor/Compressor Module)
3. Check EEV connector assemble
condition/normal operation
4. Check refrigerant pressure
→
Reassemble or manage if abnormality found
Are the resistance
Between each phase and
insulation resistance of Inverter
compressor normal?
No
Yes
1. Check resistance between each terminal of
compressor (Refer to the right side tables.)
2. Check insulation resistance between compressor
terminal and pipe (over 50m)
→
Replace compressor if abnormality found
Is compressor
Wire connection
condition normal?
No
Yes
1. Check Inv. PCB U,V,W connector
connection condition
2. Check wire disconnection and wiring
3. Check compressor terminal connection condition
(bad contact)
→
Reassemble if abnormality found
Is input voltage normal?
No
Yes
Check
R~S/S~T/T~R phase voltage is 380V 10%
R~N/S~N/T~N phase voltage is 220V 10%
→
Check connection condition and wiring if power
is abnormal
Is Inv. PCB normal?
No
Check Inv. PCB IPM normality
→
Replace Inv. PCB
Yes
Temp
25°C
75°C
U-V 0.529 ± 7% Ohms 0.631 ± 7% Ohms
V-W 0.529 ± 7% Ohms 0.631 ± 7% Ohms
W-U 0.529 ± 7% Ohms 0.631 ± 7% Ohms
RJA036MAA
