Troubleshooting Guide
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40*
Master
401
Slave1
402
Slave2
403
Slave3
404
Inverter compressor CT
sensor error
Error
No.
Error Type Error Point Main Reasons
Micom input voltage isn't
within 2.5V ±0.3V at initial
state of power supply
1. Input voltage abnormal (R-N)
2. ODU Comp PCB damage
(CT sensing part)
n Error Diagnosis and Countermeasure Flow Chart
Is input voltage normal?
No
Yes
Recheck power and installation condition
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 Comp PCB assembly normal?
No
Yes
Replace Comp PCB assembly
* Measuring input voltage
* Comp PCB assembly
1. Check R/S/T/N wiring conditions
2. Check Noise filter wiring conditions
→ Rewire them if abnormality found.
No
Yes
Are there any power wire
connections normal?
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