P1 Open Phase Or Power Supply Voltage Imbalance - Daikin R71FUV1 Service Manual

Troubleshooting by Remote Controller
P1
3.75
Supply Voltage Imbalance
Remote Controller Display
P1
Applicable Models
RZQ-K/H, RZQ(S)-B/C, RZQG, RZR-KU/HU
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 inverter PCB

• Defective main circuit capacitor
 • Power unit (Disconnection in diode module)

• Defective magnetic relay

• Improper main circuit wiring
Open Phase or Power
Si20-701_B
329