Table 10-1 Troubleshooting
Case
Symptom
Possible Cause
Troubleshooting
The rectifier
is abnormal.
The UPS rectifier
cannot work, and
the bus voltage is
not boosted.
The mains voltage
exceeds the upper
threshold 280 V or
is less than the
lower threshold 80
V.
Check whether the
mains voltage is
beyond the allowed
range. If so, contact
the electric power
company.
PFC soft-start fails. Replace the power
module.
The power module
is faulty.
Replace the power
module.
The inverter
is abnormal.
The buzzer buzzes,
the fault indicator is
on, the inverter is
faulty, and the UPS
transfers to bypass
mode.
Output overload or
short-circuit exists.
Reduce the load or
troubleshoot the
short circuit.
The power module
is faulty.
Replace the power
module.
The charger
generates
an alarm.
The buzzer buzzes,
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 setting
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.
The UPS is set to
ECO mode.
Set the working
mode correctly.
The number of
bypass transfer
times reaches the
upper limit.
On the LCD, choose
Clear Faults.
The bypass
is abnormal.
The buzzer buzzes,
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.
UPS5000-H-(1200 kVA-1600 kVA)
User Manual (100 kVA Power Modules)
10 Troubleshooting
Issue 05 (2021-10-13)
Copyright © Huawei Technologies Co., Ltd.
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