Huawei UPS5000-S Series User Manual page 262

50 kva-300 kva
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UPS5000-S-(50 kVA-300 kVA)
User Manual
Table 7-1 Troubleshooting
Case
The
rectifier
is not
normal.
The
inverter
is not
normal.
The
charger
generate
s an
alarm.
The UPS
works in
bypass
mode
and does
not
transfer
to
inverter
mode.
The
bypass is
not
normal.
Issue 11 (2020-12-07)
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.
The buzzer is
activated, and the
Fault indicator is on.
Copyright © Huawei 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 module is
faulty.
The UPS is
overloaded or short-
circuited.
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.
7 Troubleshooting
Measure
Check whether the
mains voltage
exceeds the
threshold. If yes,
contact the electric
power company.
Replace the power
module.
Replace the power
module.
Reduce load or
rectify short circuits.
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.
On the LCD, choose
Clear Faults.
Replace the bypass
module.
252

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