Maintenance
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UPS 30-300kVA User Manual
5 Maintenance
This chapter introduces UPS maintenance, including the maintenance instructions of power unit ,
monitor unit and bypass unit and the replacement method of dust filter.
5.1 Precautions
Only maintaining engineers can maintain the power unit, monitor unit and bypass unit.
1)
The power unit should be disassembled from top to bottom, so as to prevent any inclination
from high gravity center of the cabinet.
2)
To ensure the safety before maintaining power unit and monitor unit, use a multimeter to
measure the voltage between operating parts and the earth to ensure the voltage is lower than
hazardous voltage, i.e. DC voltage is lower than 36Vdc, and AC maximum voltage is lower
than 30Vac.
3)
Monitor unit and bypass unit is not recommended to hot swap; only when UPS is in
Maintenance Bypass Mode or UPS is completely powered off, the monitor unit and bypass
unit can be disassembled.
4)
Wait 10 minutes before opening the cover of the power unit after pulling out from the
Cabinet.
5.2 Instruction for Maintaining Power unit
Confirm the UPS is operating in Normal Mode and the bypass is working normally before pulling
out the power unit needed to be repaired.
1)
Ensure the remaining power module will not be overloaded.
2)
Power off the power unit:
a)
Enable. LCD panel
->
Menu Operate
->
Enable Module “OFF” icon
.
b)
Press the “OFF” button on the power unit panel for 3 seconds, the power unit
quits from the system.
3)
Remove the mounting screw on the two front sides of the power unit and pull out the power
unit by two persons.
4)
Wait 10 minutes before opening the cover for repairing.
5)
After the repairing is done, push the power unit into the cabinet and the power unit will
automatically join the system.
5.3 Instruction for Maintaining monitor unit and bypass unit
5.3.1 Maintaining monitor unit and bypassunit for 60kVA-120kVA
Confirm the UPS is operating in Normal mode and the bypass is working normally
1)
Transfer the system to bypass mode through the LCD control panel (Refer to chapter 5.2.2).
2)
Turn on the maintenance bypass breaker. The load is powered through maintenance bypass
and static bypass.
3)
One by one to turn off the battery breaker, input breaker, bypass input breaker and output
breaker. The load is powered through maintenance bypass.
4)
Take out two power units, which are close to the monitoring unit and the bypass unit, can be
taken to repair the monitoring and the bypass unit.
5)
After the completion of maintenance, insert power unit and tighten the screws on both sides
of the power unit.
6)
One by one to turn on the output breaker, bypass input breaker, input breaker and battery
breaker.
7)
After 2 minutes, the bypass indicator LED goes green, and the load is powered through
