Si18-525B Troubleshooting for Outdoor Unit
Troubleshooting 389
7.23 Power Supply Insufficient or Instantaneous Failure
Remote
Controller
Display
U2
Applicable
Models
AII outdoor unit models
Method of
Malfunction
Detection
Detection of voltage of main circuit capacitor built in the inverter and power supply voltage.
Malfunction
Decision
Conditions
Supposed
Causes
Power supply insufficient
Instantaneous failure
Defect of inverter PCB
Defect of outdoor control PCB
Main circuit wiring defect