LG ARNU Series, Service Manual

Page: 151 / 226

Service Manual 151
Troubleshooting Guide
Low voltage / High
voltage
Error
Code
Error Contents Meaning Main Causes
Error display
position
25
1.Input voltage in the instal-
lation region= 3 phase
380-10%, 415+10%
2. Single phase = 220-10%,
240+10%
Concerned
Remote con-
troller
Panel Display
Outdoor unit
1. Abnormality of the input voltage
2. Outdoor Unit main line fuse dam-
age
3. Outdoor Unit main PCB defect
■
Defect inspection method
1) Check whether the input power (3 phase = 380V-10% ~ 415+10% single phase = 220V-10% ~ 240+10%).
In case there is a deviation from the required power in each phase or is not the rated voltage, then please
request the building electricity in charge to supply the required power.
2) Check whether the Outdoor Unit PCB power input is 220V-10%, 240+10%.
Otherwise, Outdoor Unit line fuse be installed and required input voltage should be supplied.
3) In case the Outdoor Unit PCB power input is normal then replace the PCB.