Troubleshooting Guide
- 286 -
Copyright ©2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Refer to CH49
Error No.
Error Type
Error Point
Main Reasons
Abnormal resistance value of
sensor measurement
( Open / Short )
Outdoor voltage sensing
error
172(Sub3)
• Defect of constant compressor
• Defect of discharge temperature sensor
• Defect of outdoor temperature sensor
• Defect of outdoor PCB
• Defect of magnet switch
• Wrong connection of constant compres-
sor cables
Error No.
Error Type
Error Point
Main Reasons
Over-increase of temperature
after constant compressor
starts
Abnormal staring of
constant compressor
173
(MAIN constant)
174, 175
(sub1 constant 1,2)
176, 177
(sub2 constant 1,2)
■
Error diagnosis and countermeasure flow chart
Is resistance value
(insulation & phase to phase)
of corresponding constant
compressor normal ?
[refer electric
component part]
No
Replace constant compressor
Is outdoor air temperature
sensor normal?
No
Is discharge temperature
sensor of compressor
normal? [refer electric
component part]
No
Is cables
’
connection
of compressor normal?
*
Yes
Adjust connection of cables
No
Yes
Is magnet switch
normal? [refer electric
component part]
Replace magnet switch
No
Replace discharge
temperature sensor
Replace outdoor air
temperature sensor
Yes
Yes
Yes
Replace outdoor unit PCB
* cables connection between constant compressor
and magnetic switch
Summary of Contents for ARNU07GB1G1
Page 338: ...P NO 3828A24006P FEBRUARY 2009 ...
