92
16.5.8 Outdoor Low Pressure Abnormality (H63)
Malfunction Decision Conditions:
During operation of heating, when the outdoor low pressure sensor output signal is 0Vdc or 5Vdc.
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-LPS connector connection:
- Turn OFF the power.
- Check the connector connection.
Check the continuity of the outdoor unit PCB (main)
high pressure sensor connector CN-LPS:
- Plug out connector from the outdoor unit PCB (main).
- Measure the continuity pin 2 & 3 (GND) and pin 2 &
4 (5 V) of CN-LPS.
Is the CN-LPS connector
connection normal?
Is the measured voltage
0Vdc or 5Vdc?
Reconnect the low pressure sensor
connector to the outdoor unit PCB
(main). Turn ON the power and run
the system. Measure the DC voltage
pin 2 & 3 (GND) of CN-LPS.
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 low
pressure sensor.
- Replace the outdoor
low pressure sensor.
- Defect in outdoor unit
PCB (main).
- Replace the outdoor
unit PCB (main).
Содержание WH-MHF09G3E5
Страница 32: ...32 10 1 2 Solar Printed Circuit Board Optional ACL PUMP L PUMP N CN SOLAR_B ACL1 3V ACL2 3V ACN 3V ACN ...
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Страница 136: ...136 19 2 Water System 2 45 44 46 34 17 16 4 1 45 47 3 18 36 33 9 35 19 43 ...