Replacing Psus (Interconnected Psus) - Huawei DPU40D-N06A3 User Manual

DPU40D-N06A3, DBU20B-N12A3, and
DBU50B-N12A1 Distributed Power System
User Manual
4.
Step 5 Switch on the upstream input circuit breaker for the PSU.
Step 6 Take off the protective gloves.
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Follow-up Procedure
Pack the removed component and return it to the local Huawei warehouse.

5.3.4 Replacing PSUs (Interconnected PSUs)

Prerequisites


Procedure
Step 1 Put on the protective gloves.
Step 2 Switch off the upstream input circuit breaker for the PSUs.
Step 3 Remove the old PSUs.
1.
2.
3.
4.
Issue 04 (2020-02-29)
Use waterproof tape to seal the cable connections.
You have obtained a pair of protective gloves, an inner hex torque screwdriver, a
flat-head screwdriver, a Phillips screwdriver, and waterproof tape.
You have prepared new PSUs.
Record the cable connection positions on the PSUs.
Use a flat-head screwdriver to pry the fastener on the quick connector and take off the
connector, as shown in the following figure.
Figure 5-10 Removing a quick connector
Disconnect the cables from the PWR, LOAD, BAT, and COM ports as well as the
ground cable in sequence. Insulate the cables.
Remove the old PSUs.
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