ESIE09-05 Troubleshooting by Indication on the Remote Controller
Troubleshooting 209
3.39 “U2” Power Supply Insufficient or Instantaneous Failure
Remote
Controller
Display
U2
Applicable
Models
ERQ 125 ~ 200 A7V1
Method of
Malfunction
Detection
Detection of voltage of main circuit capacitor built in the inverter and power supply voltage.
Malfunction
Decision
Conditions
When the abnormal voltage of main circuit capacitor built in the inverter and abnormal power
supply voltage are detected.
Supposed
Causes
Power supply insufficient
Instantaneous power failure
Defect of outdoor unit fan motor
Defect of outdoor inverter PC board (A2P)
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