Huawei UPS5000-A User Manual page 152

UPS5000-A-(30 kVA-120 kVA) User Manual
User Manual
Table 7-1 Troubleshooting
Case
The
rectifier is
abnormal
.
The
inverter is
abnormal
.
The
charger
generates
an alarm.
The UPS
works in
bypass
mode
and does
not
transfer
to
inverter
mode.
The
bypass is
abnormal
.
Issue 15 (2022-11-15)
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.
The buzzer buzzes,
and the fault
indicator is on.
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Possible Cause
The mains voltage
exceeds the upper
threshold 280 V or is
less than the lower
threshold 80 V.
PFC soft-startup fails. Replace the power
The power unit is
faulty.
Output overload or
short-circuit exists.
The power unit 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.
The bypass thyristor
is damaged.
The bypass unit
experiences
overtemperature.
7 Troubleshooting
Measure
Check whether the
mains voltage is
beyond the allowed
range. If so, contact
the electric power
company.
unit.
Reduce the load or
troubleshoot the
short circuit.
Replace the power
unit.
Replace the power
unit.
Check whether the
configured number
of batteries is
correct. If the setting
is correct but the
alarm persists,
replace the power
unit.
Set the working
mode correctly.
On the LCD, choose
Clear Faults.
Replace the bypass
unit.
Reduce the load, or
improve ventilation.
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