For 6/8 Hp Outdoor Units - Daikin VRV S RXQ4/5ARV1 Service Manual

Symptom-based Troubleshooting
2.2

For 6/8 HP Outdoor Units

Decrease of main circuit power supply insulation
resistance (Less than 1 M)
182
Problem
Decrease of main circuit power supply
insulation resistance
Cut the power supply.
Remove the compressor wiring from the
power supply terminal. Isolate the wiring
and be careful not to touch the live parts.
Measure the insulation resistance of the
main circuit power supply.
1 MΩ or more?
YES
Turn the power supply on and leave it on
for 6 hours (keep the compressor wiring
disconnected).
Cut the power supply.
Connect the compressor wiring to the
terminal, or to the noise filter PCB and
measure the insulation resistance.
1 MΩ or more?
YES
Normal
Define the measure using the flowchart below.
NO
Defective local power supply
Check the local power supply.
NO
SiAF332111E
Measure
Compressor abnormality
Replace the compressor.
Part 6 Service Diagnosis