Huawei NetCol8000-A Maintenance And Troubleshooting Manual page 16

Indoor Unit - Electric Control Sys
tem
Semiannual Maintenance (2)
Inspection
No.
Method
Use a brush or compressed dry air to clean various
Visual electric components, control components, the main
5
inspection control board, and the surge protection and voltage test
board.
Check that the main control board, display panel,
Visual temperature and humidity sensor, surge protection and
6
inspection voltage test board, and power cables are free from
aging on the surface.
Check that the transformer is intact and the
Visual
7 output voltage is within the normal range (24 V AC ±
inspection
10%).
Visual Check that all circuit breakers are working
8
inspection properly.
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Operations Troubleshooting
N/A
Replace the
components
or cables.
Check whether the
power input cable is
properly. If
no, reconnect it. If
yes, replace the
transformer.
Replace the circuit
breakers.
Page 17