97
16.5.13 Indoor-Control Panel Communication Abnormality (H76)
Malfunction Decision Conditions:
During standby and operation of heating, indoor-remote control error occur.
Malfunction Caused:
1 Faulty
connector
connection.
2 Faulty remote control.
3 Faulty indoor unit PCB (main).
Troubleshooting:
For safety reason and to prevent component breakdown,
always switch off the power before remove and connect the component.
Check the CN-REMOTE connector connection:
- Turn OFF the power
- Check the connector connection
Check the DC voltage from the indoor unit PCB (main):
- Plug out connector from the indoor unit PCB (main).
- Turn ON the power.
- Measure the DC voltage pin 1 & 4 of CN-REMOTE.
Is the CN-REMOTE
connector connection normal?
Is the remote controller
voltage 5Vdc (pin 1 & 4)
generated?
Check the remote control
cable connection.
Is the remote control cable
connection normal?
- Defect in cable connection.
- Replace remote control cable.
- Connector poor contact.
- Correct the connection.
- Defect in remote controller .
- Replace the remote
controller.
- Defect in indoor unit PCB
(main).
- Replace the indoor unit PCB
(main).
Yes
Yes
Yes
No
No
No
Содержание WH-MHF09G3E5
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