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16.5.13 Water Flow Switch Abnormality (H62)
Malfunction Decision Conditions:
During operation of cooling and heating, the water flow detected by the indoor water flow switch is used to
determine water flow error.
Malfunction Caused:
1 Faulty
water
pump.
2 Water leak in system.
3 Faulty
connector
connection.
4 Faulty water flow switch.
5 Faulty indoor unit PCB (main).
Abnormality Judgment:
Continue for 10 seconds (but no judgment for 9 minutes after compressor startup/restart).
Check the indoor water flow switch:
- Plug out connector from the indoor
unit PCB (main)
- Dismantle the water flow switch
- Position the water flow switch in
reverse direction (downward)
- Measure the continuity of the water
flow switch
- Defect in indoor water flow
switch
- Replace the indoor water
flow switch
Yes
Is there any continuity?
No
Check the CN-FLOW connector connection:
- Turn OFF the power
- Check the connector connection
- Connector poor contact
- Correct the connection
No
Is the CN-FLOW connector
connection normal?
- Defect in indoor unit PCB
(main)
- Replace the indoor unit PCB
(main)
Yes
Check the system water passage.
Fix the system water
leakage.
Yes
Is there any water leakage?
No
Check the system water pump.
Is the water pump working?
Replace the faulty water
pump.
Yes
No
Troubleshooting:
For safety reason and to prevent component breakdown,
always switch off the power before remove and connect the component.
Caution