Huawei UPS5000-A-400K-SL User Manual page 187

UPS5000-A-(400 kVA-500 kVA)
User Manual (40 kVA Power Modules)
Case Symptom
The inverter is The buzzer is activated,
not normal.
the Fault indicator is on,
the inverter is faulty, and
the UPS transfers to
bypass mode.
The charger The buzzer is activated,
generate an the Fault indicator is on,
alarm. and the charging
function fails.
The UPS When the mains is
works in normal, the UPS works
bypass mode in bypass mode and does
and does not not transfer to inverter
mode.
transfer to
inverter mode.
The bypass is The buzzer is activated,
not normal. and the Fault indicator is
on.
For details about component replacement and maintenance involved in Troubleshooting and Alarm List,
consult Huawei maintenance engineers.
Issue 06 (2020-01-10)
Possible Cause
PFC soft-startup fails.
The power unit is faulty.
The load is overloaded or
short-circuited.
Inverter overtemperature
occurs.
The power unit is faulty.
The charger fails.
The charger experiences
overcurrent.
The charger experiences
undervoltage.
Set the UPS working mode to
ECO mode.
The bypass transfer times
reach the upper threshold.
The bypass thyristor is
damaged.
The bypass unit experiences
overtemperature.
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7 Troubleshooting
Measure
Replace the power unit.
Reduce load or rectify short
circuits.
Install more air conditioners
or ventilation devices to
ensure normal temperatures
inside the equipment room.
Replace the power unit.
Replace the power unit.
Check whether the configured
number of batteries is correct.
If the value is correct but the
alarm persists, replace the
power unit.
Set the working mode
correctly.
Clear the bypass transfer
times on the LCD.
Replace the bypass unit.
Reduce the load, or improve
ventilation.
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