Inverter Circuit Capacitor High Voltage - Daikin VRV IV-S RXTQ-TAVJU Series Service Manual

SiUS331604E

4.36 Inverter Circuit Capacitor High Voltage

P1
Error Code
Applicable
All outdoor units
Models
Method of Error The voltage waveform of the main circuit capacitor of the inverter is used to check for errors.
Detection
Error Decision The above-mentioned voltage waveform looks like the waveform of the power supply with a
Conditions missing phase
Supposed
Causes
Troubleshooting
Service Diagnosis
Defective main circuit capacitor
Incorrect main circuit wiring
Defective outdoor unit PCB
Unbalanced voltage between phases
Missing phase
Be sure to turn off the power switch before connecting or disconnecting
Caution connectors, or parts may be damaged.
Measure voltage between L1 and L2,
L1 and L3, and L2 and L3.
Is three-phase power
voltage within rated voltage
±10%?
YES
Is the
unbalanced phasic voltage
within ±10%?
YES
NO
NO
Troubleshooting by Error Code
Calibrate the power voltage.
Calibrate the power voltage.
Replace the outdoor main
PCB (A1P).
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