Pioneer QUANTUM INVERTER Series Service & Troubleshooting Manual page 129

Remarks:
• Use a multimeter to test the DC voltage between #2 port(or S/L2 port) and #3 port(or N/S port) of outdoor unit.
The red pin of multimeter connects with 2 port(or S or L2 port), while the black pin is for 3 port(or N or S port).
• When the AC is normal running, the voltage is moving alternately between positive values and negative values.
• If the outdoor unit has faulted, the voltage will fluctuate at positive values.
• If the indoor unit has faulted, the voltage will remain at a certain value.
• Use a multimeter to test the resistance of the reactor which does not connect with capacitor.
• The normal value should be around zero ohm. Otherwise, the reactor is malfunctioning.
Note: The picture and the value are only for reference, actual condition and specific value may vary.
Troubleshooting
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21
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S and N
or
L2 and S
or
2 and 3