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 pin
②
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
