Troubleshooting by Remote Controller Si20-701_B
361
3.87
U2
Insufficient Voltage
Remote Controller Display
U2
Applicable Models
RZ(Y)
Method of Error Detection
Detection is based on the voltage in main circuit
capacitor for inverter and the supply voltage.
Error Decision Conditions
When the voltage in main circuit capacitor for inverter and
the supply voltage drop (171 - 190 VAC), or when power
outage of more than 20 or 30 ms occurs.
Supposed Causes
îš„ Supply voltage drop (lower than 198 V)
îš„ Momentary power failure
îš„ Open phase
îš„ Defective K1M
îš„ Defective contact or open circuit in X51A
îš„ Defective wiring in main circuit
îš„ Defective outdoor unit PCB
îš„ Damaged main circuit parts
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