Huawei NetCol8000-A Maintenance And Troubleshooting Manual page 15

Indoor Unit - Electric Control Sys
tem
Semiannual Maintenance (1)
Inspection
No.
Method
Visual Check and secure all circuit cables, and ensure that all
1
inspection wiring terminals are securely tightened.
Visual
2 Ensure that each plug has proper contact.
inspection
Check that each input and output connector between
Visual the main control board and the display panel has proper
3
inspection contact, as well as the connection between the main
control board and the temperature and humidity sensor.
Check that the main control board is properly connected
to each contactor, electric heater temperature switch,
Visual
4 dry heating protection temperature switch of the
inspection
infrared humidifer water pan, flter clogging switch, and
fan airfow loss switch.
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Operations Troubleshooting
Secure the cables and
terminals.
Connect the plug
again. If
the fault is not
rectifed, replace the
plug.
Connect the cables
again.
Connect the cables
again.
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