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UPS5000-E-180 kVA
User Manual (Integrated UPS, 30 kVA Power
Modules)
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 05 (2024-01-30)
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
Measure
The mains voltage
Check whether the
exceeds the upper
mains voltage is
threshold 280 V or
beyond the allowed
is less than the
range. If so, contact
lower threshold 80
the electric power
V.
company.
PFC soft-start fails. Replace the power
module.
The power
Replace the power
module is faulty.
module.
Output overload
Reduce the load or
or short-circuit
troubleshoot the
exists.
short circuit.
The inverter is
Install more smart
overheated.
cooling products or
ventilation devices to
ensure normal
temperature inside
the data center.
The power
Replace the power
module is faulty.
module.
The charger fails.
Replace the power
module.
The charger
Replace the power
experiences
module.
overcurrent.
The charger
Check whether the
experiences
number of batteries
undervoltage.
is correct. If the
number of batteries
is correct but the
alarm persists,
replace the power
module.
The UPS is set to
Set the working
ECO mode.
mode correctly.
The number of
Reset the bypass
bypass transfer
transfer times on the
times reaches the
LCD.
upper limit.
7 Troubleshooting
123
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