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17.5.14 Outdoor High Pressure Abnormality (H64)
Malfunction Decision Conditions:
During operation of cooling and heating, when the outdoor high pressure sensor output signal is 0 Vdc or 5 Vdc.
Malfunction Caused:
1 Faulty connector connection.
2 Faulty sensor.
3 Faulty outdoor unit PCB (main).
Abnormality Judgment:
Continue 4 times in 20 minutes.
Troubleshooting:
For safety reason and to prevent component breakdown,
always switch off the power before remove and connect the component.
Check the CN-HPS connector connection:
- Turn OFF the power
- Check the connector connection
Check the continuity of the outdoor unit PCB (main)
high pressure sensor connector CN-HPS:
- Plug out connector from the outdoor unit PCB (main)
- Measure the continuity pin 1 & 3 (GND) and pin 1 &
4 (5 V) of CN-HPS
Is the CN-HPS connector
connection normal?
Is the measured voltage
0 Vdc or 5 Vdc?
Reconnect the high pressure sensor
connector to the outdoor unit PCB (main).
Turn ON the power and run the system.
Measure the DC voltage pin 1 & 3 (GND)
of CN-HPS.
Is there any continuity?
Yes
Yes
Yes
No
No
No
- Connector poor contact
- Correct the connection
- Defect in outdoor unit
PCB (main)
- Replace the outdoor
unit PCB (main)
- Defect in outdoor high
pressure sensor
- Replace the outdoor
high pressure sensor
- Detect in outdoor unit
PCB (main)
- Replace the outdoor
unit PCB (main)
Caution
