Replacing An Spd - Huawei FusionModule 1000A20 Maintenance Manual

FusionModule1000A20 Prefabricated All-in-One Data
Center
Maintenance Guide
Documents: none
Skill requirement: electrician's work permit
Procedure
Step 1 Determine the position of the faulty MCB, and open the corresponding cabinet door.
Step 2 Remove the front panel of the PDC circuit breaker using a Phillips screwdriver.
Step 3 Switch a multimeter to the DC voltage mode to measure the voltage between positive and
negative copper bars at the upper part of the switch. If the voltage is lower than 36 V DC for 1
minute, replace the MCB.
Step 4 Remove the three cables from the top and bottom of the MCB.
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Step 5 Push the buckle at the MCB outwards using a flat-head screwdriver, and remove the faulty
MCB.
Step 6 Install the new MCB by referring to the preceding method, connect cables, and tighten
screws.
Step 7 Reinstall the removed components, and close the corresponding cabinet door.
----End
Follow-up Procedure
Dispose of the removed MCB that is confirmed faulty.

4.1.2.5 Replacing an SPD

Prerequisites
Do not replace an SPD during a thunderstorm.
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Impact on the System
None
Issue 01 (2019-07-15)
When removing cables, remove the cable from the bottom of the MCB first.
After removing cables, insulate the cable terminals.
When removing cables, label the cables with corresponding terminal ports for later
connection.
An SPD is faulty.
A spare SPD of the same model is available and functional.
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4 Parts Replacement
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