LG GB7143**AV Series Service Manual page 52

7. Defrost Heater Error (dH r)
No
1 Check the Door gasket.
2 Check the Defrost control part.
Def Sensor
3 Input Test 2 Mode.
(Push the button 2 times)
4 Check the Orange to Blue.
<CON3>
5 R elease the test mode.
Push the button 1 times. (Normal)
6 Check the Orange to Blue.
<CON3>
Checking ow
Def Heater
Fuse
M
Result & SVC Action
Part Result
Fuse-M
Def 34~42
Heater
Def
Sensor
Result
220 ~ 240 V
0 V
Result
0 V
220 ~ 240 V
- 52 -
SVC Action
Go to the 3
0
Change Fuse-M
Go to the 3
Change Fuse-M
Go to the 3
0
Replace product
SVC Action
Go to the 5
Replace Main PCB
SVC Action
Explain to customer
Replace Main PCB