Daikin RZQG71L9V1, Service Manual

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Troubleshooting by Remote Controller ESIE15-13C
166 Service Diagnosis
4.29 Open Phase or Power Supply Voltage Imbalance
Remote
Controller
Display
P1
Applicable
Models
RZQG
Method of Error
Detection
The error is detected according to the voltage waveform of main circuit capacitor built in
inverter.
Error Decision
Conditions
When the aforementioned voltage waveform becomes identical with the waveform of the power
supply open phase.
Supposed
Causes

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
Troubleshooting
Replace the outdoor unit
inverter PCB.
Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be occurred.
Field factors
YES
NO
Field factors
NO
YES
YES
Measure the power supply voltage
between 3 phases. (R-S, S-T, T-R)
Is the voltage
rated 10%?
Is the voltage
imbalance between phases
less than ±10%?