Troubleshooting by Remote Controller Si20-701_B
363
3.88
U2
Power Supply Voltage
Abnormality
Remote Controller Display
U2
Applicable Models
RZQ-K/H, RZQ(S)-B/C, RZR-KU/HU
Method of Error Detection
The error is detected according to the voltage of main
circuit capacitor built in the inverter and power supply
voltage.
Error Decision Conditions
When the voltage of main circuit capacitor built in the
inverter and power supply voltage drop (150-170 VAC) or
when the power failure of several tens of ms or more is
generated.
∗ Remote controller does not decide the abnormality.
Supposed Causes
îš„ Drop in power supply voltage (180 V or less)
îš„ Instantaneous power failure
îš„ Inverter open phase (Phase T)
îš„ Defective main circuit wiring
îš„ Defective outdoor unit inverter PCB
îš„ Main circuit parts damaged
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