Si20-701_B Troubleshooting by Remote Controller
326
3.74
P1
Inverter Over-Ripple
Protection
Remote Controller Display
P1
Applicable Models
CMSQ, RZQ-C7
Method of Error Detection
Imbalance in supply voltage is detected in PCB.
Imbalance in the power supply voltage causes increased
ripple of voltage of the main circuit capacitor in the
inverter. Consequently, the increased ripple is detected.
Error Decision Conditions
When the resistance value of thermistor becomes a value
equivalent to open or short circuited status.
∗ Error is not decided while the unit operation is
continued.
"P1" will be displayed by pressing the inspection
button.
When the amplitude of the ripple exceeding a certain
value is detected for consecutive 4 minutes.
Supposed Causes
îš„ Open phase
îš„ Voltage imbalance between phases
îš„ Defective main circuit capacitor
îš„ Defective inverter PCB
îš„ Defective K2 relay in inverter PCB
îš„ Improper main circuit wiring
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