● 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 rectied, contact Huawei technical support.
Table 6-4 Power supply and distribution system troubleshooting
Symptom Possible Cause Measure
The power input to the
downstream device is
abnormal.
● The switch trips
abnormally.
● The UPS is faulty.
● 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.
The surge protection
function fails.
● The SPD circuit
breaker is OFF.
● The SPD ground cable
is not connected.
● The surge protection
module is abnormal.
The SPD window is
red.
● 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 whether the
SPD ground cable is
properly connected.
● Replace the surge
protection module.
For details, see 6.4.2.1
Replacing a Surge
Protection Module.
FusionModule800 Smart Small Data Center
User Manual 6 O&M
Issue 01 (2021-02-05) Copyright © Huawei Technologies Co., Ltd. 367
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