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UPS5000-E-(25 kVA-75 kVA)-BF
User Manual
If any unmentioned faults occur, see the alarm list chapter, or contact Huawei technical
support.
Table 7-1 Troubleshooting
Case
Symptom
The
The rectifier is not working,
rectifier is
and the bus voltage is not
not
boosted.
normal.
Issue 07 (2019-12-13)
If the UPS is faulty, alarm information is displayed on the LCD. Clear critical alarms
before powering on the UPS again. Otherwise, the fault scope expands or the UPS is
damaged.
Do not clear alarms by reseating modules.
Remove a faulty module after it is confirmed that the module needs replacing. After
removing the module, do not insert it into the UPS again.
After a UPS finishes troubleshooting and is started, if the LCD continues displaying alarm
information, choose System Info > Alarms > Clear Faults to clear the alarm and then
start the inverter.
To restore battery discharge after batteries reach EOD, use one of the following methods: 1.
Switch to another battery string. Ensure that each battery has a voltage greater than the
EOD voltage and 11.3 V/cell. 2. Restore the mains power supply to start the inverter.
Close the battery switch and charge batteries until each battery has a voltage greater than
the EOD voltage and 11.3 V/cell.
Copyright © Huawei Technologies Co., Ltd.
7
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.
7 Troubleshooting
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.
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