Si20-701_B Troubleshooting by Remote Controller
370
3.90
U2
Power Supply Voltage
Abnormality
Remote Controller Display
U2
Applicable Models
RZQG
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 or when the
power failure of several tens of ms or more is generated
Supposed Causes
îš„ Drop in power supply voltage
îš„ Defective outdoor unit fan motor
îš„ Instantaneous power failure
îš„ Defective outdoor unit inverter PCB
îš„ Main circuit parts damaged
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