Daikin VRVIII-S, Service Manual

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SiENBE34-703 Troubleshooting by Indication on the remote control
Troubleshooting 163
3.36 “
P1
” Outdoor Unit: High Voltage of Capacitor in Main
Inverter Circuit
remote control
Display
P1
Applicable
Models
RXYSQ4~6P
Method of
Malfunction
Detection Malfunction is detected according to the voltage waveform of main circuit capacitor built in the
inverter.
Malfunction
Decision
Conditions When the aforementioned voltage waveform becomes identical with the waveform of the power
supply open phase.
Supposed
Causes
!
Defect of main circuit capacitor
! Improper main circuit wiring
! Defect of outdoor unit PC board (A2P)
! Imbalance of phase-to-phase voltages
! Open phase
Troubleshooting
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Have the
power supply
voltages of three phases
fallen within the range of
rated voltage
±10%?
Make measurement of power
supply voltages between L1 and
L2, L1 and L3, and L2 and L3.
Correct the power supply voltages.
Has the
imbalance of
phase-to-phase
voltages fallen within
±10%?
Correct the power supply voltages.
Replace the inverter PC board
assy (A2P).
Caution
NO
NO
YES
YES