Open Phase Or Power Supply Voltage Imbalance - Daikin SkyAir GQI-Eco Series Service Manual

Troubleshooting by Remote Controller

4.27 Open Phase or Power Supply Voltage Imbalance

P1
Remote
Controller
Display
Applicable RZQG
Models
Method of Error The error is detected according to the voltage waveform of main circuit capacitor built in
inverter.
Detection
Error Decision When the aforementioned voltage waveform becomes identical with the waveform of the power
supply open phase.
Conditions
Supposed
Causes
Troubleshooting
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Measure the power supply voltage
between 3 phases. (R-S, S-T, T-R)
YES
Is the voltage
rated 10%?
NO
Is the voltage
imbalance between phases
less than ±10%?
YES
146
Open phase
Voltage imbalance between phases
Defective outdoor unit PCB
•

Defective main circuit capacitor

•
Power unit (Disconnection in diode module)

•
Defective magnetic relay (K1R, K10R)

•
Improper main circuit wiring
YES
NO
SiBE281013
Field factors
Field factors
Replace the outdoor unit
inverter PCB.
Service Diagnosis