Huawei FusionModule800 Maintenance Manual page 45

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 UPS input switch. When the output switch is off, start the inverter. After checking
that the UPS starts normally, shut down the inverter. The UPS transfers to static bypass mode
at this moment. After that, close the UPS output switch, 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
Scenario with Two UPSs (One Faulty)
Step 1 Ensure that the TN system is reliably grounded, and that the main ground cable of the Smart
Module is reliably connected.
Issue 02 (2016-11-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
5 Parts Replacement
39