P1" Outdoor Unit: High Voltage Of Capacitor In Main Inverter Circuit - Daikin ERQ Service Manual

Troubleshooting by Indication on the Remote Controller
P1
3.37 " " Outdoor Unit: High Voltage of Capacitor in Main
Inverter Circuit
P1
Remote
Controller
Display
Applicable
ERQ 125 ~ 200 A7V1
Models
Method of Malfunction is detected according to the voltage waveform of main circuit capacitor built in the
Malfunction inverter.
Detection
Malfunction
When the aforementioned voltage waveform becomes identical with the waveform of the power
Decision supply open phase.
Conditions
Supposed
Causes
Troubleshooting
206
Defect of main circuit capacitor
Improper main circuit wiring
Defect of outdoor unit PC board (A2P)
Imbalance of phase-to-phase voltages
Open phase
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Make measurement of power
supply voltages between L1 and
L2, L1 and L3, and L2 and L3.
Have the
power supply voltages
NO
of three phases fallen within the
range of rated voltage
±10%?
YES
Has the
imbalance of
NO
phase-to-phase voltages
fallen within
±10%?
YES
Correct the power supply voltages.
Correct the power supply voltages.
Replace the inverter PC board
assy (A2P).
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ESIE09-05
Troubleshooting