Panasonic WH-ADC0309H3E Service Manual page 173

17.5.24 Unspecified Voltage between Indoor and Outdoor (H95)
Malfunction Decision Conditions:
The supply power is detected for its requirement by the indoor/outdoor transmission.
Malfunction Caused:
1 Insufficient power supply.
2 Faulty outdoor unit PCB (noise filter/main).
Troubleshooting:
Check the supply voltage.
Supply voltage as specified?
Check the AC voltage from outdoor unit PCB (noise filter):
- Turn OFF the power.
- Plug out connector AC-BLK, CN-BLK & CN-WHT from
the outdoor unit PCB (noise filter).
- Turn ON the power.
- Measure the AC voltage between AC-BLK & CN-WHT.
Is the measured AC voltage
230 V?
Check the AC voltage supply to outdoor unit PCB (main):
- Turn OFF the power.
- Reconnect connector AC-BLK, CN-BLK & CN-WHT to
the outdoor unit PCB (noise filter).
- Turn ON the power.
- Measure the AC voltage between AC-BLK & CN-WHT.
No
Correct the power
supply.
Yes
- Defect in outdoor
No
unit PCB (noise filter).
- Replace the outdoor
unit PCB (noise filter).
Yes
For safety reason and to prevent component breakdown,
always switch off the power before remove and connect the component.
Is the measured AC voltage
230 V?
Yes
Check the rectification voltage
between DCP & DCN.
Is the measured voltage
between DCP & DCN~325 Vdc?
Yes
Check the DC filter (capacitor)
PCB connector connection.
Is the DC filter (capacitor) PCB
connector connection normal?
Yes
173
- Defect in outdoor unit
No
PCB (main).
- Replace the outdoor unit
PCB (main).
- Defect in outdoor unit
No
PCB (main).
- Replace the outdoor unit
PCB (main).
No
- Connector poor contact.
- Correct the connection.
- Defect in outdoor unit
PCB (main).
- Replace the outdoor unit
PCB (main).