58 Room Air Conditioner
Troubleshooting Guide
When Inlet Grille does not operate.
• Confirm that the Inlet Grille is normally geared with the shaft of Stepping
Motor.
• If the regular torque is detected when moving the Inlet Grille with hands
⇒ Normal
• Check the connecting condition of CN-SUB Connector
• Check the soldering condition(on PWB) of CN-SUB Connector
Check the operating circuit of the Vertical Louver
• Confirm that there is DC
+
12V between pin② of CN-SUB and GND.
• Confirm that there is a soldering short at following terminals.
- Between 45
, 40 ,
48 and 53
of MICOM
- Between
1 , 2 , 3 and 4 of CN-SUB
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
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