Huawei NetCol8000-A Maintenance And Troubleshooting Manual page 22

Troubleshooting (1)
Symptom
The NetCol8000-A
generates abnormal
voice.
A compressor does not
work.
The compressor exhaust
temperature is too high.
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Possible Cause
Compressor, fans, or pipes are
loose.
The high-pressure switch reacts.
The low-pressure switch reacts.
The exhaust temperature switch
reacts.
Circuit breakers, fuses, or cables
are disconnected.
An indoor fan does not work at a
high speed.
A compressor motor is damaged.
A compressor does not need to
start.
The outdoor unit is installed in an
inappropriate position. (The outdoor
unit should not be exposed to direct
sunlight
and must be installed at a specifed
spacing according to the
installation guide.)
Check whether the air exhaust
pressure is too high.
Heat dissipation is poor because
the condenser is dirty or blocked.
Solution
Check the fxing structure and ensure
that all components are securely
installed.
Check the high-pressure switch
status.
Check the low-pressure switch status.
Check the exhaust temperature
switch status.
Check the main circuit breaker,
compressor circuit breakers, fuses,
and cables.
Check whether the indoor fan works
at a high speed.
Replace the motor.
Check for any startup requirement on
the LCD.
Install the outdoor unit in a correct
position, without exposure to direct
sunlight and with an appropriate
spacing.
If the air exhaust pressure is too high,
re-inject refrigerant to expel free air
from the cooling loop.
Clean the condenser fns.
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