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.
100
Procedure
Step 1
Open the electric control box, check whether the main control board circuit breaker QF5 is
switched on.
If not switched on, switch on QF5 and check whether the fault is rectified.
−
If yes, troubleshooting is complete.
−
If not, go to
Step 2
.
If switched on, go to
Step 2
.
Step 2
Check whether the indicator of the main control board is
ON
.
If
ON
, go to
Step 3
.
If
OFF
, check whether the main control board terminals are secure, check whether the
fault is rectified after securing terminals. If not rectified, check whether the transformer
fuse is blown.
−
If the transformer fuse is blown, replace it and check whether the fault is rectified, if
not, go to
Step 3
.
−
If the transformer fuse is normal, check whether the transformer is faulty, if yes,
replace it and check whether the fault is rectified, if not, go to
Step 3
.
Step 3
Check the terminals on main control board and LCD are secured firmly.
If the connection is not secured, fasten the cable connection and check whether the fault
is rectified.
−
If yes, troubleshooting is complete.
−
If no, indicates the LCD is faulty, replace the LCD (see
5.6.12 Replacing the LCD
)
and check whether the fault is rectified, if rectified, troubleshooting is complete, if
not rectified, go to
Step 4
.
If the connection not secured, go to
Step 4
.
Step 4
Contact Huawei technical support.
----End
5.6 Parts Replacement
5.6.1 Replacing Air Filters
Prerequisites
The air filter needs to be replaced.
A spare and functional component is available.
Context
An indoor unit has upper and lower air filters. The rear door is opened for rear-access
maintenance.
