FusionModule1000A20 CT Solution
Maintenance Guide
4 Alarms and Faults
Issue 01 (2019-02-25)
Copyright © Huawei Technologies Co., Ltd.
51
Fault Category
Alarm Severity
Possible Cause
Operation
The compressor
does not work or is
not working
efficiently.
Contact Huawei
technical support.
Low temperature
Major
The indoor
temperature is too
low.
Measure the indoor
ambient
temperature.
The parameter is set
to an inappropriate
value.
Check the
environment
setpoints.
The heater is not
working.
Check the power
circuit of the heater.
The control system
is not working
properly.
Check the control
system operating
status.
The heat loss is
higher than
expected.
Check the heat loss,
and verify whether
the indoor
environment is
properly sealed.
EEPROM error
Major
The storage device
is faulty.
Reset to the default
value and set the
parameter again. If
the alarm persists,
contact Huawei
technical support.
High pressure, low
pressure, or no
airflow
Major
The suction pressure
or discharge
pressure of the
compressor is too
high.
Check the system
pressure, high
pressure switch, and
low pressure switch.
Check whether the
fan runs properly.
Contact Huawei
technical support if
necessary.
The suction pressure
or discharge
pressure of the
compressor is too
low.
The fan is not
working.
Power alarm
Major
No power supply is
available or the
input voltage is too
low.
Check the voltage.
The power cable is
in poor contact.
Check the power
cable connection.