U2" Power Supply Insufficient Or Instantaneous Failure - Daikin R-410A Service Manual

SiBE39-402A

4.36 "U2" Power Supply Insufficient or Instantaneous Failure

U2
Remote
Controller
Display
Applicable
AII outdoor unit models
Models
Method of Detection of voltage of main circuit capacitor built in the inverter and power supply voltage.
Malfunction
Detection
Malfunction
Decision
Conditions
! Power supply insufficient
Supposed
! Instantaneous failure
Causes
! Defect of inverter PC board
! Defect of outdoor control PC board
! Main circuit wiring defect
Troubleshooting
Troubleshooting by Indication on the Remote Controller
151