Huawei FusionModule500 User Manual page 172

FusionModule500 Smart Mini Data Center
User Manual (ECC800e)

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.

If the fault is not rectified, contact Huawei technical support.
Table 4-5 Troubleshooting Power Supply and Distribution Faults
Symptom
The rear-end device power
input is abnormal.
The surge protection
function fails.
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 fails to
communicate.
Issue 07 (2019-12-20)
Possible Cause
 The switch trips
abnormally.

The UPS is faulty.

The SPD circuit breaker
is not turned on.
 The SPD ground cable is
not connected.

The surge protection
module is abnormal. The
SPD window is red.
The input power supply is
not connected.
The input voltage is less
than the lower threshold or
greater than the upper
threshold.
The mains switch is off.
The input power cable is not
securely connected.

The UPS
communications cable is
Copyright © Huawei Technologies Co., Ltd.
4 Maintenance
Measure
 Use a multimeter to
check whether there is a
short circuit. Turn on the
switch again, and check
whether the system is
overloaded.
 Restart the UPS. If the
UPS is faulty, replace it
in time.

Check that the SPD
circuit breaker is turned
on. The power
distribution subrack
(monitoring type) will
prompt an alarm
indicating that the SPD
circuit breaker is not
turned on.

Check that the SPD
ground cable is
connected.
 Replace the surge
protection module by
referring to 4.5.2.2
Replacing a Surge
Protection Module.
Check the UPS input power
cable connection.
Use a voltmeter to check
that the UPS input voltage
meets specifications.
Turn on the mains switch.
Check the UPS input power
cable connection.

Reconnect the UPS
communications cable.
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