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Self-diagnosis function
Error No.
Error Type
50*
Master 501
ODU 3phase power
omission error
Slave1 502
Slave2 503
n Error Diagnosis and Countermeasure Flow Chart
Are there any power wire
connections normal?
Yes
Is input voltage normal?
Yes
Is Main PCB assembly
normal?
Yes
INV. PCB LED display error
Yes
Recheck power and installation condition
* Measuring input voltage
Error Point
Omitting one or more of
R,S,T input power
No
1. Check R(L1)/S(L2)/T(L3) wiring conditions
→ Rewire them if abnormality found.
Check
No
R~S/S~T/T~R phase voltage is 575 V±10 %
→ Check connection condition and wiring if power is
abnormal
1. R~S/S~T/T~R phase voltage is 575 V±10 %
2. Check Main PCB assemblywire disconnection and
No
wiring
→ Reassemble if abnormality found
No
Replace inverter PCB assembly.
* Noise filter wiring
T S R
R
S
T
- 130 -
Main Reasons
1. Input Voltage abnormal (R,S,T)
2. Check power Line connection condition
3. Main PCB damage
4. Inverter PCB input current sensor fault
* Field Fault Case
* R-Phase Terminal
Changed Color.
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All right reserved. Only for training and service purposes
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