Huawei UPS5000-S User Manual page 215

UPS5000-S-1200 kVA
User Manual
Table 7-1 Troubleshooting
Case
The
rectifier is
not
normal.
The
inverter is
not
normal.
The
charger
generates
an alarm.
The UPS
works in
bypass
mode and
does not
transfer
to
inverter
mode.
The
bypass is
not
normal.
Issue 08 (2020-12-15)
Symptom
The rectifier is not
working, and the
bus voltage is not
boosted.
The buzzer is
activated, the Fault
indicator is on, the
inverter is faulty,
and the UPS
transfers to bypass
mode.
The buzzer is
activated, 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 is
activated, 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.
The power module is
faulty.
The UPS is
overloaded or short-
circuited.
The power module 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.
7 Troubleshooting
Measure
Check whether the
mains voltage
exceeds the
threshold. If yes,
contact the electric
power company.
Replace the power
module.
Replace the power
module.
Reduce load or
rectify short circuits.
Replace the power
module.
Replace the power
module.
Replace the power
module.
Check whether the
configured number
of batteries is
correct. If the value
is correct but the
alarm persists,
replace the power
module.
Set the working
mode correctly.
On the LCD, choose
Clear Faults.
Replace the bypass
module.
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