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Service Manual 53
Troubleshooting Guide
When Louvers do not operate.
• Confirm that the Louver is normally geared with the shaft of Stepping
Motor.
• If the regular torque is detected when rotating the Louver with hands
Normal
• Check the connecting condition of CN-UD, LR1, LR2 Connector.
• Check the soldering condition(on PWB) of CN-UD LR1, LR2 Connector.
If there are no problems after above checks
• Confirm the assembly conditions that are catching and interfering parts
in the rotation radial of the Louvers.
Check the operating circuit of the Louvers.
• Confirm that there is DC
+
12V between pin of CN-UD and GND.
• Confirm that there is a soldering short at following terminals.
-
Between , , , , , , , , , , , of MICOM
- Between
of IC02M
- Between ,
of IC03M
- Between , , , , , , , of IC04M
- Between , , , of CN-UD/LR1/LR2
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