Power Supply Insufficient Or Instantaneous Failure - Daikin Super Multi Plus E-Series FTXG25EV1BW Service Manual

SiBE18-821_C

7.25 Power Supply Insufficient or Instantaneous Failure

U2
Remote
Controller
Display
Method of Detection of voltage of main circuit capacitor built in the inverter and power supply voltage.
Malfunction
Detection
Malfunction When the abnormal voltage of main circuit capacitor built in the inverter and abnormal power
supply voltage are detected
Decision
Conditions
Supposed
Causes
Troubleshooting
Check No.03
Refer to P.425
Troubleshooting
Power supply insufficient
Instantaneous power failure
Defective outdoor fan motor
Defective main PCB (A1P)
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Is the power
supply voltage
200~240V ±10%?
YES
Is the P-N
resistance not less
than several hundred
of ohms?
YES
Check No.03
Is the resistance above
standard value?
YES
When the compressor is
running, measure the voltage
between + and - of
electrolytic capacitor (C+, C-).
Is the
measured voltage 220 -
240 VDC or
more?
NO
NO
NO
NO
YES
Troubleshooting for Outdoor Unit
Correct power supply
Field factors
Replace the fan motor.
Monitor the voltage
(Instantaneous voltage
drop)
Replace the main PCB
(A1P).
(R13044)
411