LG Electronics AMNH123DEA0(LMN120HE) Air Conditioner User Manual


 
Service Manual 71
Troubleshooting Guide
When the louver does not operate.
Trouble 5
When Vertical Louver does not operate.
Confirm that the Vertical Louver is normally geared with the shaft of
Stepping Motor.
If the regular torque is detected when rotating the Vertical Louver with
hands Normal
Check the connecting condition of CN-UP/DOWN Connector
Check the soldering condition(on PWB) of CN-UP/DOWN Connector
Check the operating circuit of the Vertical Louver
Confirm that there is DC
+
12V between pin (RED) of CN-UP/DOWN and
GND.
Confirm that there is a soldering short at following terminals.
- Between 60 , 61 , 62 and 63 of MICOM
- Between
2 , 3 , 4 and 5 of IC01M
- Between 12 , 13 ,
14 , 15
of IC01M
- Between
1 , 2 , 3 , 4 and 5 of CN-UP/DOWN
If there are no problems after above checks
Confirm the assembly conditions that are catching and interfering parts in
the rotation radial of the Vertical Louver