Huawei UPS5000-E-30 kVA User Manual page 162

UPS5000-E-(30 kVA–180 kVA)
User Manual (Integrated UPS)
Table 7-1 Troubleshooting
Case
Rectifier
abnormal
Inverter
abnormal
Charger
alarm
The UPS
works in
bypass
mode and
does not
transfer to
inverter
mode.
Issue 02 (2022-12-30)
Symptom
The UPS rectifier
cannot work, and the
bus voltage is not
boosted.
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.
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-start fails. Replace the power
The power
module is faulty.
Output overload
or short-circuit
exists.
The inverter is
overheated.
The power
module is faulty.
The charger fails.
The charger
experiences
overcurrent.
The charger
experiences
undervoltage.
The UPS is set to
ECO mode.
The number of
bypass transfer
times reaches the
upper limit.
7 Troubleshooting
Measure
Check whether the
mains voltage is
beyond the allowed
range. If so, contact
the electric power
company.
module.
Replace the power
module.
Reduce the load or
troubleshoot the
short circuit.
Install more smart
cooling products or
ventilation devices to
ensure normal
temperature inside
the data center.
Replace the power
module.
Replace the power
module.
Replace the power
module.
Check whether the
number of batteries
is correct. If the
number of batteries
is correct but the
alarm persists,
replace the power
module.
Set the working
mode correctly.
Reset the bypass
transfer times on the
LCD.
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