OPTI-UPS MD120L - Manual (Page 50)

Chapter 5 Maintenance 47
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5. Take off the fixing bolt at the two sides of front board of bypass module, extract the front cable
assembly of the module and extract the module from the cabinet.
6. After maintaining the module, insert the module into the cabinet, tighten the screw at the two sides,
and connect the front cable assembly of manufacturer’s module.
7. Close UPS output switch and input switch in turn.
2 mins later, bypass indicator on the operator control and display panel lights on, which indicates
the normal power supply of bypass.
8. Open maintenance bypass switch, the inverter starts automatically, 60s later; the UPS will transfer
to normal mode.
6.2 Replacing Dust Screen (optional)
As shown in fig 6-1, there are 3~4 dust filters on the back of UPS ’ front door, each screen is held in
place by a bracket on either side of each filter. The procedure of replacing each filter is as follows:
1. Open the UPS ’ front door and locate the filters on the back side of the front door
2. Remove one bracket.
3. Remove the dust screen to be replaced and insert the clean one.
4. Reinstall the bracket.
防尘网
固定条
Fig 6-1 Dust screen on the back side of UPS front door
Bracket
Dust screen