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
Confirm that there is a soldering short at following terminals.
- Between 77 , 78 , 79 and 80 of MICOM
- Between 4 , 5 , 6 and 7of 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