Huawei NetCol5000-C - Condensate Pump Maintenance; Indoor Fan Maintenance; Electrical Control System Maintenance

NetCol5000-C Chilled Water-Cooled In-Row Precision
Air Conditioner
User Manual
6 System Operation and Maintenance
Issue 02 (2013-12-10)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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2. Check whether the air filter is damaged or deformed. If yes, replace the air filter by
following the instructions provided in 6.5.3 Replacing an Air Filter.
3. Check whether the differential pressure sensor of the air filter works properly. Block
75% of the air return vent with plastic material or baffle plate. If the air filter blocking
alarm is generated, the differential pressure sensor is working properly. If the air filter
blocking alarm is not generated, check whether the differential pressure tube is correctly
connected.
6.2.3 Condensate Pump Maintenance
To maintain the condensate pump, perform the following steps:
1. Check that screws fastening the condensate pump are securely connected.
2. Raise the high float and check the high float status on the LCD. If the high float floats,
the float is of good condition.
3. Check whether two water pumps drain water properly. If a pump cannot drain water,
replace the water pump.
6.2.4 Indoor Fan Maintenance
To maintain an indoor fan, perform the following steps:
1. Check that the indoor fan does not make noise and the screws are not tightened.
2. Check that foreign matter does not exist in the fan.
3. Check that the cable terminals are securely connected.
6.2.5 Electrical Control System Maintenance
Table 6-4 describes the maintenance items for the electrical control system.
Table 6-4 Maintenance items for the electrical control system
Maintenance
Item
Operation
Connections
Check that wiring terminals are securely connected.
Check that connectors are properly connected.
Ensure that input and output cable connectors on the front panel of the
electrical control box are securely connected. The cables include user
cables, cables between the main control board and display panel, cables
between the main control board and the humidity and temperature sensor,
cables between the main control board and the host, and cables between
main control boards.
Check that cables from the front panel of the electrical control box to
fans, humidity and temperature sensors, power supplies, chilled water
valves, condensate pump, high and low float switches, water sensors, and
air filter block switch are securely connected.
Dust and
aging status
Check whether the display panel or humidity and temperature sensor is
aging on the surface.
Check whether the power cables are aging. If yes, replace the power