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UPS5000-A-(200 kVA-800 kVA)
User Manual
Table 6-1 Solutions to common faults
Case
The
rectifie
r is not
normal
.
The
inverte
r is not
normal
.
The
charger
genera
te an
alarm.
The
UPS
works
in
bypass
mode
and
does
not
transfe
r to
inverte
Issue 05 (2020-04-27)
Symptom
The rectifier is not
working, and the bus
voltage is not
boosted.
The buzzer is
activated, the Fault
indicator is on, the
inverter is faulty, and
the UPS transfers to
bypass mode.
The buzzer is
activated, the Fault
indicator is on, and
the charging function
fails.
When the mains is
normal, the UPS
works in bypass
mode and does not
transfer to inverter
mode.
Copyright © Huawei Digital Power Technologies Co., Ltd.
Possible Cause
The mains voltage
exceeds the upper
threshold 280 V or is
less than the lower
threshold 80 V.
PFC soft-startup fails.
The power unit is
faulty.
The load is
overloaded or short-
circuited.
Inverter
overtemperature
occurs.
The power unit is
faulty.
The charger fails.
The charger
experiences
overcurrent.
The charger
experiences
undervoltage.
Set the UPS working
mode to ECO mode.
6 Troubleshooting
Measure
Check whether the
mains voltage
exceeds the threshold.
If yes, contact the
electric power
company.
Replace the power
unit.
Reduce load or rectify
short circuits.
Install more air
conditioners or
ventilation devices to
ensure normal
temperatures inside
the equipment room.
Replace the power
unit.
Replace the power
unit.
Check whether the
configured number of
batteries is correct. If
the value is correct
but the alarm
persists, replace the
power unit.
Set the working mode
correctly.
244
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