UPS5000-E-(25 kVA-75 kVA)-BF
User Manual
7 Troubleshooting
Issue 07 (2019-12-13)
Copyright © Huawei Technologies Co., Ltd.
199
Case
Symptom
Possible Cause
Measure
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 UPS 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 module is faulty.
Replace the power module.
The
charger
generates
an alarm.
The buzzer is activated, the
Fault indicator is on, and the
charging function fails.
The charger fails.
Replace the power module.
The charger experiences
overcurrent.
Replace the power module.
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 module.
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 module.
The bypass module
experiences overtemperature.
Reduce the load, or improve
ventilation.
A battery
module is
abnormal.
The buzzer is activated, and
the Fault indicator is on.
The battery module is not
properly installed.
Check whether the positioning
lock on the faulty battery
module is in locked state. If
the positioning lock is in
unlocked state, remove the
battery module and check
whether the pins of the output
DL terminal of the battery
module are damaged. If the
terminal is abnormal, replace
the battery module.
A fuse inside a battery module
is blown.
Check whether the output
voltage of the faulty battery
module is normal. If the
voltage is abnormal, replace
the battery module.