Pioneer QUANTUM INVERTER Series Service & Troubleshooting Manual page 148

8.4 Indoor AC Fan Motor Check
Power on and set the unit running in fan mode at high fan speed. After running for 15 seconds, measure the
voltage of pin1 and pin2. If the value of the voltage is less than 100V(208~240V power supply) or
50V (115V power supply), the PCB has faulted and need to be replaced.
Troubleshooting 40
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