54 NS3000 UPS 60KVA~120KVA User Manual
6. Maintenance
This chapter introduces UPS maintenance, including the maintenance
instructions of power module and monitoring bypass module and the
replacement method of dust filter.
6.1 Precautions
Only maintaining engineers can maintain the power module and monitoring
bypass module.
1. The power module should be disassembled from top to bottom, so as to
prevent any inclination from high gravity centre of the cabinet.
2. To ensure the safety before maintaining power module and bypass module,
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 60Vdc, and AC maximum voltage is lower than 42.4Vac.
3. Bypass module is not recommended to hot swap; only when UPS is in
Maintenance Bypass Mode or UPS is completely powered off, the bypass
module can be disassembled.
4. Wait 10 minutes before opening the cover of the power module or the bypass
after pulling out from the Cabinet.
6.2 Instruction for Maintaining Power Module
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.
6.3 Instruction for Maintaining monitor unit and bypass unit
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
Summary of Contents for NS3000 Series
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