U2" Power Supply Insufficient Or Instantaneous Failure - Daikin VRV II RXYQ5MY1B Service Manual

SiE39-404

2.41 "U2" Power Supply Insufficient or Instantaneous Failure

U2
Remote
Controller
Display
Applicable RXYQ5~48M
Models
Method of
Detection of voltage of main circuit capacitor built in the inverter and power supply voltage.
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Troubleshooting
Power supply insufficient
Instantaneous failure
Open phase
Defect of inverter PC board
Defect of outdoor control PC board
Defect of K1M.
Main circuit wiring defect
Troubleshooting by Indication on the Remote Controller
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