25021-511-B4-002, Rev. B
7.0 Maintenance

7.1 Battery Replacement

The MPS48-7M batteries are hot-swappable. There is no need to power down the unit when
replacing the batteries.
Required Tools and Materials:
#2 fl athead screwdriver
1. Unplug the battery connections.
2. Loosen the retaining screw on the battery retaining bracket and move the bracket clear of
the battery shelf.
3. Remove the batteries in need of replacement.
4. Replace with 7.2Ah batteries. Re-tape the battery temperature sensor to the side of the
second battery if necessary.
5. Secure the battery retaining bracket.
6. Connect the batteries; the positive battery connections are fi tted with a safety tab to
prevent misconnection.

7.2 Replacing the Power Module

Required Tools and Materials:
11/32" (9mm) wrench or socket
1. Verify utility power is OFF. Tag and lock
utility power switch.
2. Disconnect all connections to the power
module.
3. Loosen the four Keps nuts securing the
power module to the enclosure. There is
no need to remove them completely.
4. Slide the top of the power module forward
and remove the power module.
5. Install a new power module and secure
the four Keps nuts.
6. Reconnect all connections.
7. Restore AC power and verify the status LEDs do not indicate a fault. If any other
indication is present see to Section 6.0 for troubleshooting tips.
Keps Nuts Keps Nuts