LG ABNH186HLAB, Service Manual

Page: 102 / 183

Troubleshooting Guide
102 Universal System Air Conditioner
• 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-U/D or CN0L/R Connector
• Check the soldering condition(on PCB) of CN-U/D or CN0L/R Connector
Check the operating circuit of the vertical louver
• Confirm that there is DC +12V between pin
➀
of CN-U/D, CN0L/R and GND.
• Confirm that there is a soldering short at following terminals.
- Between
1
,
2
,
3
and
4
of MICOM - Between
17
,
18
,
19
and
20
of MICOM
- Between
4
,
5
,
6
and
7
of IC01M - Between
5
,
6
,
7
and
8
of IC01M
When the louver does not operate.
Trouble 5
If there are no problems after above checks.
• Confirm the assembly condition that are catching and interfering parts in the link of the
vertical louver