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UPS5000-E-(20 kVA-80 kVA)
User Manual (Integrated UPS, 208 V)
Case
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.
The ATS is not
normal.
Issue 04 (2020-03-12)
Symptom
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.
After being powered
on, the ATS
automatically
switches from ON to
OFF or switches
Copyright © Huawei Technologies Co., Ltd.
Possible Cause
PFC soft-startup
fails.
The power module
is faulty.
The UPS is
overloaded or
short-circuited.
Inverter
overtemperature
occurs.
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.
The bypass module
experiences
overtemperature.
The input
three-phase
sequence is
incorrect.
8 Troubleshooting
Measure
power company.
Replace the power
module.
Replace the power
module.
Reduce load or
rectify short circuits.
Install more air
conditioners or
ventilation devices
to ensure normal
temperatures inside
the equipment room.
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.
Clear the bypass
transfer times on the
LCD.
Replace the bypass
module.
Reduce load or
improve ventilation.
Power off the ATS
and check the phase
sequence.
186
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