Chapter 10 Service And Maintenance 71
APM 300 Integrated UPS Single Module And Parallel System User Manual
4. After servicing the module, check that the address of this module is different from those of other modules
and that the address is in the range 1
~
5. Check that the ready switch is in unready state.
5. Push the module (at least 10s after another) into the cabinet, and tighten the screws on both sides.
6. Wait for two seconds, place the ready switch of the module to the down position, and the module is ready.
Then the module will be added into the system automatically and begin to work.
10.2.3
Standard default procedure (when load transfer to Bypass is allowed) for service the bypass module:
Provided that the UPS is in normal mode, and that the bypass is normal:
1. Press and hold the INVERTER OFF key on the operator control and display panel for two seconds to manually
turn off the inverters, and the UPS transfers to bypass mode.
2. Close the maintenance bypass, and the UPS transfers to maintenance mode.
3. Open the output switch, rectifier input switch and bypass input switch of the UPS.
4. Press the EPO key, ensure that the battery current is 2A. Open the BCB or disconnect the batteries.
5. Remove the fixing screws on both sides of the front panel of the bypass module, disconnect the cables and
pull the module out of the cabinet. Wait for 10 minutes before servicing the bypass module.
6. After servicing the module, push the module into the cabinet, tighten the screws on both sides and restore
the connection of the cables disconnected in step 5.
Note
It requires massive force to push the bypass module into and pull it out of the cabinet. To pull it out of the cabinet, move
it left and right slightly first, and then try several times to pull it out. When pushing it into the cabinet, you are required
to push it into place by one time; or else, the bypass module may not be connected properly, which may cause
malfunction of the bypass module and the whole system. The bypass module is regarded to have been pushed into
place if the fixing screws on both sides can be tightened and the brackets on both sides of the bypass module cling to
the vertical columns of the cabinet.
7. Close the output switch, rectifier input switch and bypass input switch of the UPS in turn.
Two minutes later, the bypass indicator on the operator control and display panel turns on, indicating the UPS
is operating in bypass mode.
8. Open the maintenance bypass switch, press and hold the INVERTER ON key on the operator control and
display panel for two seconds to manually turn on the inverters, and the UPS transfers to normal mode.
10.2.
4 Alternate Procedure (When Load transfer to Bypass is not allowed):
1. Please make sure that the running load is within the capacity of Power modules, connected On-Line
2. Please check firmware version for compatibility
3. Swap the faulty Static Bypass module following step
4. Remove the fixing screws on both sides of the front panel of the bypass module, and pull the module out of
the cabinet. Wait for 10 minutes before servicing the bypass module.
5. After servicing the module, push the module (at least 10s after another) into the cabinet, and tighten the
screws on both sides.
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