LG LAN121CNM Service Manual - Page 54

When Vertical Louver does not operate.

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Troubleshooting Guide 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 77 , 78 , 79 and 80 of MICOM - Between 4 , 5 , 6 and 7 of IC01M - Between 10 , 11 , 12 and 13 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 54 Room Air Conditioner

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54
Room Air Conditioner
Troubleshooting Guide
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
77
,
78
,
79
and
80
of MICOM
- Between
4
,
5
,
6
and
7
of IC01M
- Between
10
,
11
,
12
and
13
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