UPS5000-A-500 kVA
User Manual (e-shelter)
7 Troubleshooting
Issue 02 (2020-01-10)
Copyright © Huawei Technologies Co., Ltd.
164
Case
Symptom
Possible Cause
Measure
PFC soft-startup fails.
Replace the power unit.
The power unit is faulty.
The inverter is
not normal.
The buzzer is activated,
the Fault indicator is on,
the inverter is faulty, and
the UPS transfers to
bypass mode.
The load is overloaded or
short-circuited.
Reduce load or rectify short
circuits.
Inverter overtemperature
occurs.
Install more air conditioners
or ventilation devices to
ensure normal temperatures
inside the equipment room.
The power unit is faulty.
Replace the power unit.
The charger
generate an
alarm.
The buzzer is activated,
the Fault indicator is on,
and the charging
function fails.
The charger fails.
Replace the power unit.
The charger experiences
overcurrent.
The charger experiences
undervoltage.
Check whether the configured
number of batteries is correct.
If the value is correct but the
alarm persists, replace the
power unit.
The UPS
works in
bypass mode
and does not
transfer to
inverter mode.
When the mains is
normal, the UPS works
in bypass mode and does
not transfer to inverter
mode.
Set the UPS working mode to
ECO mode.
Set the working mode
correctly.
The bypass transfer times
reach the upper threshold.
Clear the bypass transfer
times on the LCD.
The bypass is
not normal.
The buzzer is activated,
and the Fault indicator is
on.
The bypass thyristor is
damaged.
Replace the bypass unit.
The bypass unit experiences
overtemperature.
Reduce the load, or improve
ventilation.
For details about component replacement and maintenance involved in Troubleshooting and Alarm List,
consult Huawei maintenance engineers.