Troubleshooting Guide
- 90 -
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Only for training and service purposes
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AC Input Current Over Error
22*
Master
221
Slave1
222
Slave2
223
Slave3
224
Error
No.
Error Type Error Point Main Reasons
Converter PCB Assembly
input 3 phase power
current is over limited
value(24A)
1. Overload operation (Pipe
clogging/Covering/EEV defect/Ref.
overcharge)
2. Compressor damage(Insulation
damage/Motor damage)
3. Input voltage low
4. Power Line Misconnection
5. Converter PCB Assembly damage
(Input current sensing part)
n Error Diagnosis and Countermeasure Flow Chart
Is installation
condition normal?
No
Yes
Yes
Yes
Recheck power and installation condition
Yes
1. Check Pipe clogging/distortion
2. Check Covering (Indoor/Outdoor Unit)
3. Check EEV connector assemble condition/normal
operation
4. Check refrigerant pressure
→ Reassemble or manage if abnormality found
Is converter PCB assembly
bridge diode joining condition normal?
No
Check joining condition of converter PCB assembly and
bridge diode
→ joining again if abnormality found
Yes
Is input voltage normal?
No
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
Yes
Is Comp PCB assembly
normal?
No
Check Comp PCB assembly IPM normality
→ Replace Comp PCB assembly
Are the resistance
Between each phase and
insulation resistance of Inverter
compressor normal?
No
1. Check resistance between each terminal of compressor
(U-V:0.255 ±7%, V-W:0.255 ±7%, W-U:0.255 ±7%(75℃)
2. Check insulation resistance between compressor
terminal and pipe (over 50M )
→ Replace compressor if abnormality found
Is compressor
Wire connection
condition normal?
No
1. Check Comp PCB assembly U,V,W connector
connection condition
2. Check wire disconnection and wiring
3. Check compressor terminal connection condition
(bad contact)
→ Reassemble if abnormality found
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