Table 10-1 Troubleshooting
Case
Symptom
Possible Cause
Measure
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
configured number
of batteries 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.
UPS5000-H-(400 kVA-800 kVA)
User Manual (100 kVA Power Module)
10 Troubleshooting
Issue 02 (2021-04-22)
Copyright © Huawei Technologies Co., Ltd.
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