Troubleshooting by Remote Controller Si20-701_B
365
3.89
U2
Power Supply Insufficient
or Instantaneous Failure
Remote Controller Display
U2
Applicable Models
RZQ-C7, CMSQ
Method of Error Detection
Detection of voltage of main circuit capacitor built in the
inverter and power supply voltage.
Error Decision Conditions
When the voltage aforementioned is not less than 780V
or not more than 320V, or when the current-limiting
voltage does not reach 200V or more or exceeds 740V.
Supposed Causes
îš„ Power supply insufficient
îš„ Instantaneous power failure
îš„ Open phase
îš„ Defective inverter PCB
îš„ Defective outdoor control PCB
îš„ Main circuit wiring defect
îš„ Defective compressor
îš„ Defective fan motor
îš„ Defective connection of signal cable
To Next Page
Loading...
Need help?
General
