NetCol5000-A020 Air Cooled In-row Precision Air
Conditioner
User Manual
5 System Operation and Maintenance
Issue 01 (2014-06-30)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
74
Item
Operations
Troubleshooting
Result
insulation foams on the
steam pipes are not
damaged.
foams.
Check that solenoid
valves of the water inlet
and drainpipe to the
electrode humidifier
function properly.
Replace the solenoid valves.
Check the water scale in
the humidifier cylinder.
Remove the humidifier cylinder,
clean and brush the water scale
inside the humidifier cylinder with
20% acetic acid or replace the
humidifier cylinder by referring to
5.6.4 Replacing the Humidifier
Cylinder
.
Check the humidifier run
overtime alarm is not
reported.
Remove the humidifier cylinder,
clean and brush the water scale
inside the humidifier cylinder with
20% acetic acid or replace the
humidifier cylinder by referring to
5.6.4 Replacing the Humidifier
Cylinder
.
After the humidifier
starts, the current of each
phase is less than 1.2 A.
Remove the humidifier cylinder,
clean and brush the water scale
inside the humidifier cylinder with
20% acetic acid or replace the
humidifier cylinder by referring to
5.6.4 Replacing the Humidifier
Cylinder
.
Pipes
Check that the thermal
insulation foams on the
refrigerant pipe are not
damaged or corroded.
Evacuating the refrigerant, and
repair the leak on the pipe. Wrap
the thermal insulation foams.
Check that the refrigerant
pipe support is intact and
securely installed.
Replace the pipe support and
tighten it.
Table 5-2
Quarterly maintenance items
Item
Operations
Troubleshooting
Result
Air filters
Check that the filters are
tidiness and not blocked.
Clean or replace the air filters by
referring to
5.6.1 Replacing Air
Filters
.
Condensate
water pan
Check that no foreign
matter exists on the
Clean the condensate water pan,
water tank, and remove foreign
