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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:
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?
Correct the power
supply
- Defect in outdoor
unit PCB (noise filter)
- Replace the outdoor
unit PCB (noise filter)
- Defect in outdoor unit
PCB (main)
- Replace the outdoor unit
PCB (main)
- Defect in outdoor unit
PCB (main)
- Replace the outdoor unit
PCB (main)
- Defect in outdoor unit
PCB (main)
- Replace the outdoor unit
PCB (main)
- Connector poor contact
- Correct the connection
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
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
Is the measured AC voltage
230 V?
Check the rectification voltage
between DCP & DCN.
Is the measured voltage
between DCP & DCN~325 Vdc?
Check the DC filter (capacitor)
PCB connector connection.
Is the DC filter (capacitor) PCB
connector connection normal?
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Check the supply voltage
Supply voltage as specified?
Caution