Huawei NetCol5000-A - Troubleshooting

NetCol5000-A 42 kW Air Cooled In-row Precision Air
Conditioner
User Manual
5 Operation and Maintenance
Issue 01 (2017-07-27)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
154
Alarm
ID
Alarm
Alarm
Severity
Impact
Possible Cause
Solution
down.
board.
a222
Main ctrl
module
power
failure
Critical
The alarm
is
generated.
1. The PSU is faulty.
2. The PSU is in poor
contact.
3. The auxiliary power
supply is faulty.
4. The auxiliary power
supply is in poor contact.
5. The main control module
is faulty.
1. Replace the PSU.
2. Check the PSU
interconnection module.
3. Replace the auxiliary
power supply.
4. Check the
interconnection module
of the auxiliary power
supply.
5. Replace the main control
module.
5.3 Troubleshooting

Certain circuits in the air conditioner have lethal voltages. Only professional technicians
are allowed to perform maintenance.

Exercise caution during live-line troubleshooting.

If jumpers are used for troubleshooting, remove them after troubleshooting. Connected
jumpers may affect control functions and damage equipment.
Table 5-6 describes how to troubleshoot the NetCol5000-A.
Table 5-6 Troubleshooting
Symptom
Possible Cause
Solution
The unit
generates
abnormal
voice.
Compressor, fans, or pipes are
loose.
Check the fixing structure and ensure
that all components are securely
installed.
A
compressor
does not
work.
The high-pressure switch reacts.
Check the high-pressure switch
status.
Circuit breakers, fuses, or cables
are disconnected.
Check the main circuit breaker,
compressor circuit breakers, fuses,
and cables.
A compressor motor is damaged.
Replace the motor.
A compressor does not need to
Check for any startup requirement on