Huawei UPS5000-E Series User Manual page 202

UPS5000-E-(20 kVA-160 kVA)
User Manual (Low voltage)
Case
The inverter
is abnormal.
The charger
generates an
alarm.
The UPS
works in
bypass
mode and
does not
transfer to
inverter
mode.
The bypass
is abnormal.
Issue 03 (2020-04-27)
Symptom
The buzzer buzzes, the
Fault indicator is on, the
inverter is faulty, and
the UPS transfers to
bypass mode.
The buzzer buzzes, 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.
The buzzer buzzes, and
the Fault indicator is on.
For details about component replacement and maintenance involved in Troubleshooting and Alarm List,
consult Huawei maintenance engineers.
Copyright © Huawei Technologies Co., Ltd.
Possible Cause
The power module is
faulty.
The UPS is overloaded
or short-circuited.
Inverter
overtemperature
occurs.
The power module is
faulty.
The charger fails.
The charger
experiences
overcurrent.
The charger
experiences
undervoltage.
Set the UPS working
mode to ECO mode.
The bypass transfer
times reach the upper
threshold.
The bypass thyristor is
damaged.
The bypass module
experiences
overtemperature.
7 Troubleshooting
Measure
Replace the power
module.
Reduce load or rectify
short circuits.
Install more air
conditioners or
ventilation devices to
ensure normal
temperatures inside the
equipment room.
Replace the power
module.
Replace the power
module.
Replace the power
module.
Check whether the
configured number of
batteries is correct. If
the value is correct but
the alarm persists,
replace the power
module.
Set the working mode
correctly.
Clear the bypass
transfer times on the
LCD.
Replace the bypass
module.
Reduce the load, or
improve ventilation.
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