Trouble Shooting Guide
- 57 -
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Only for training and service purposes
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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 inverter PCB assembly
power connection normal?
No
Check connection between inverter PCB assembly and
bridge diode(misconnection, disconnection)
’ wiring again if abnormality found
Yes
Is input voltage normal?
No
Check
1. R-S,S-T,T-R phase are 380 V ± 10%
R-N,S-N,T-N phase are 220 V ± 10%
’ Check connection condition and wiring if power is
abnormal
Yes
Is inverter PCB assembly
normal?
No
Check inverter PCB assembly IPM normality
’ Replace inverter 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:1.083, U-W:1.123, V-W:1.096)
2. Check insulation resistance between compressor
terminal and pipe (over 50 MΩ )
’ Replace compressor if abnormality found
Is compressor
Wire connection
condition normal?
No
1. Check inverter 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
22
Max. C/T
• Over current
• Malfunction of compressor
• Blocking of pipe
• Low voltage input
• Refrigerant, pipe length, blocked, …
Display
code
Title Cause of error Check point & Normal condition
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