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Error code check
40
(401)
Inverter compressor CT
sensor error
Error
No.
Error Type
Error Point
Main Reasons
Micom input voltage isn't
within 2.5 V ±0.3 V at ini-
tial state of power supply
1. Input voltage abnormal (R-S-T)
2. ODU inverter 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 380-415 V ± 10 %,
R~N/S~N/T~N phase voltage 220 ± 10%
→
Check connection condition and wiring if power is
abnormal
Is inverter PCB assembly normal?
No
Yes
Replace inverter PCB assembly
* Measuring input voltage
* Inverter PCB assembly
1. Check R/S/T wiring conditions
2. Check Noise filter wiring conditions
→
Rewire them if abnormality found.
No
Yes
Are there any power wire
connections normal?
R(L1)
S(L2)
T(L3)
N
