Pioneer QUANTUM INVERTER Series Service & Troubleshooting Manual page 150

8.6 EXV Check
WARNING
Electricity remains in capacitors even when the power supply is off.
Ensure the capacitors are fully discharged before troubleshooting.
1. Disconnect the connector from outdoor PCB.
2. Measure the resistance value of each winding using a multi-meter.
3. Check the resistance value of each winding in the following table.
Color of lead winding
Red - Blue
Red - Yellow
Brown - Orange
Brown - White
Troubleshooting

Normal Value
About 50Ω
42