UPS5000-S-600 kVA
User Manual (Three-phase, Three-wire)
7 Troubleshooting
Issue 05 (2019-12-20)
Copyright © Huawei Technologies Co., Ltd.
187
Case
Symptom
Possible Cause
Measure
normal.
boosted.
threshold 485 V or is less
than the lower threshold
138 V.
480 V AC voltage system:
The input voltage exceeds
the upper threshold 528 V
or is less than the lower
threshold 192 V.
power company.
PFC soft-startup fails.
Replace the power
module.
The power module is faulty.
Replace the power
module.
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.