Troubleshooting - Huawei NetCol5000-A User Manual

NetCol5000-A 42 kW Air Cooled In-row Precision Air
Conditioner
User Manual
Alarm
Alarm
ID
a222 Main ctrl
module
power
failure

5.3 Troubleshooting

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Table 5-6
Table 5-6 Troubleshooting
Symptom
The unit
generates
abnormal
voice.
A
compressor
does not
work.
Issue 01 (2017-07-27)
Alarm
Impact
Severity
down.
Critical The alarm
is
generated.
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.
describes how to troubleshoot the NetCol5000-A.
Possible Cause
Compressor, fans, or pipes are
loose.
The high-pressure switch reacts.
Circuit breakers, fuses, or cables
are disconnected.
A compressor motor is damaged.
A compressor does not need to
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Possible Cause
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.
Solution
Check the fixing structure and ensure
that all components are securely
installed.
Check the high-pressure switch
status.
Check the main circuit breaker,
compressor circuit breakers, fuses,
and cables.
Replace the motor.
Check for any startup requirement on
5 Operation and Maintenance
Solution
board.
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.
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