Replacing A Power Distribution Subrack - Huawei FusionModule800 Maintenance Manual

FusionModule800 Smart Small Data Center
Maintenance Guide
Step 3 Open the front door of the cabinet. Remove the protective cover from the maintenance bypass
switch, and manually turn on the maintenance bypass switch (the UPS will automatically
transfer to bypass mode and generate an alarm indicating that the maintenance bypass switch
is turned on).
Step 4 Turn off the corresponding UPS input and output switches. Use a multimeter to check
whether the UPS input and output terminals and battery terminals are disconnected.
Step 5 Remove the rear cover from the UPS, and remove the input and output power cables, battery
cable, and signal cable.
Wrap the exposed cable with insulation tape.
Step 6 Remove screws from the UPS front panel, and pull out the UPS.
Step 7 Install the new UPS and screw it to the cabinet.
Step 8 Connect the input power cable, output power cable, and signal cables to the UPS in sequence.
Check whether the cable labels are consistent with the silk screens on the UPS, and whether
all cables are connected.
Do not connect the manual bypass switch (MBS) signal cable to the UPS rear at present.
Step 9 Close the input switches of the two UPSs. When the output switches are off, start the inverter.
After checking that the UPSs start normally, shut down the inverter. The UPSs transfer to
static bypass mode at this moment. If the UPSs are connected in parallel, set parallel
parameters. After that, close the output switches of the two UPSs, and open the manual
maintenance bypass switch. Then the loads are energized by the UPS bypass.
Step 10 Install the protective cover, and connect the MBS signal cable to the UPS rear.
Step 11 Check whether the UPS generates abnormal alarms. If there are alarms, clear them and start
the UPS.
Step 12 Close the battery switch.
----End

5.2.5 Replacing a Power Distribution Subrack

Prerequisites
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Issue 02 (2016-11-15)
Tools: electroprobe, insulation gloves, Phillips screwdriver, multimeter.
Materials: A spare power distribution subrack of the same model is available and
functional.
The power distribution subrack is damaged or faulty and cannot work.
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