Troubleshooting - Huawei UPS5000-E Series User Manual

UPS5000-E-(25 kVA-125 kVA)
User Manual (25 kVA power modules)
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.

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.

When batteries reach EOD, the battery switch in the BCB box trips if the BCB box is
configured. To restore battery discharge, close the battery switch in the BCB box (if any)
first.
 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.
For details about how to rectify common faults, see
occur, see the alarm list chapter, or contact Huawei technical support.
Table 7-1 Troubleshooting
Case
The rectifier
is not normal.
Issue 06 (2020-01-10)
Symptom
The rectifier is not
working, and the
bus voltage is not
boosted.
Copyright © Huawei Technologies Co., Ltd.
7

Troubleshooting

Table 7-1. If any unmentioned faults
Possible Cause
The mains voltage
exceeds the upper
threshold 280 V or is
less than the lower
threshold 80 V.
PFC soft-startup fails.
7 Troubleshooting
Measure
Check whether the mains
voltage exceeds the
threshold. If yes, contact
the electric power
company.
Replace the power
module.
180