Service manual

SiUS28-902_a Troubleshooting by Indication on the Remote Controller
Troubleshooting 90
3.5 “A7” Indoor Unit: Malfunction of Louver Motor (M1S)
Remote
Controller
Display
A7
Applicable
Models
FCQ, FHQ, FAQ
Method of
Malfunction
Detection
Utilizes ON/OFF of the limit switch when the motor turns.
Malfunction
Decision
Conditions
When ON/OFF of the microswitch for positioning cannot be reversed even though the louver
motor is energized for a specified amount of time (about 30 seconds).
Supposed
Causes
 Defect of louver motor
 Defect of connection cable (power supply and limit switch)
 Defect of airflow direction adjusting louver-cam
 Defect of indoor unit P.C.B.