Troubleshooting The Fresh Air Integrated Unit - Huawei FusionModule1000A20 Maintenance Manual

FusionModule1000A20 Prefabricated All-in-One
Data Center
Maintenance Guide

5.2 Troubleshooting the Fresh Air Integrated Unit

Table 5-2 Troubleshooting the fresh air integrated unit
Symptom Alarm
The fresh air None
integrated
unit has a
black screen
of death
and cannot
be started.
Issue 03 (2022-12-15)
Possible
Cause
The fresh air
integrated
unit fails to
start
because the
DC power
supply is
abnormal.
The fresh air
integrated
unit fails to
start
because the
mainboard
is faulty.
Copyright © Huawei Digital Power Technologies Co., Ltd.
5 Common Faults and Troubleshooting Measures
Solution
● If a group of fresh air integrated units fails to
start, possibly the upstream power supply is
abnormal. Check the cable connections between
the upstream power cabinet and the fresh air
integrated units.
● If a single fresh air integrated unit fails to start,
check whether the corresponding circuit breaker
in the power cabinet has tripped. If not, check
whether the power cabinet works properly. If the
circuit breaker does not trip and the power
cabinet works properly, check the cable
connections to the fresh air integrated unit.
● If the power supply is normal, the mainboard
may be burnt. Replace the mainboard with a new
one as follows:
1) Remove the lower right cover from the
equipment. 2) Open the cover of the electric
control box. 3) Remove the cables from the
mainboard. 4) Remove the screws from the
mainboard, take out the mainboard, and replace
it with a new one. 5) Install the new mainboard
in a reverse order of steps 4 to 1.
1. Check whether the cables are securely connected.
2. Replace the mainboard. The replacement
procedure is as follows:
1) Remove the lower right cover from the
equipment. 2) Open the cover of the electric
control box. 3) Remove the cables from the
mainboard. 4) Remove the screws from the
mainboard, take out the mainboard, and replace
it with a new one. 5) Install the new mainboard
in a reverse order of steps 4 to 1.
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