Troubleshooting - Huawei UPS2000-G User Manual

UPS2000-G-(6 kVA–20 kVA)
User Manual (Lead-Acid Battery)
When a UPS is faulty, alarm information is displayed on the LCD. Critical alarms
must be handled before powering on the UPS again. Otherwise, the fault may be
extended, or the UPS may be damaged.
Table 9-1 Common faults and troubleshooting
No.
1
2
3
4
Issue 23 (2024-03-15)
CA UTION
Symptom
The mains switch is
ON. The LCD displays
nothing. The system
does not perform self-
tests.
The mains is normal,
but the AC input
indicator is off. The
UPS works in battery
mode.
The UPS does not
report a fault but has
no output voltage.
The UPS does not start
after you press
Copyright © Huawei Digital Power Technologies Co., Ltd.
9

Troubleshooting

Possible Cause
The input
power supply is
not connected.
The input
voltage is less
than the lower
threshold or
greater than
the upper
threshold.
The UPS mains
switch is OFF.
The input cable
is not properly
connected.
The output
cable is not
properly
connected.
is not
. pressed long
enough.
9 Troubleshooting
Measure
Check the UPS input power
cable connection.
Use a voltmeter to check
whether the UPS input voltage
meets requirements.
Turn on the UPS mains switch.
Check the UPS input power
cable connection.
Check the output power cable
connection.
Press for more than 5
seconds until you hear a beep
sound.
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