LG ARUN Series, Руководство по обслуживанию

Страница: 88 / 134

Troubleshooting Guide
- 88 -
Copyright ©2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
AC Input Current Over Error
22*
Master
221
Slave
222
Error
No.
Error Type Error Point Main Reasons
Inverter PCB Assembly
input 3 phase power
current is over limited
value(22A)
1. Overload operation (Pipe
clogging/Covering/EEV defect/Ref.
overcharge)
2. Compressor damage(Insulation
damage/Motor damage)
3. Input voltage low
4. Power Line Misconnection
5. Inverter PCB Assembly damage
(Input current sensing part)
■
Error Diagnosis and Countermeasure Flow Chart
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
R~S/S~T/T~R phase voltage : 460
±
10% (3Ø 460V)
208/230
±
10% (3Ø 208/230V)
→
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
(0.34~0.35
Ω ±
7%)
2. Check insulation resistance between compressor
terminal and pipe (over 50M
Ω
)
→
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