- 76 -
Copyright ©2014 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Part 4 Trouble Shooting
6.6 Troubleshooting Outdoor Error
CH 40 (Inverter compressor CT sensor error)
40
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 (T-N)
2. ODU Inv. PCB damage
(CT sensing part)
■ 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 Inv. PCB assembly normal?
No
Yes
Replace Inv. PCB assembly
* Measuring input voltage
* Inv. 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?
To Next Page
Loading...
