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INTERNAL BATTERY CHARGING & REPLACEMENT:
The MDP internal battery is rated at 8 Ah, is a sealed lead acid and requires no maintenance. Battery life is typically
up to five years, but will vary depending on use and operating environment. The battery should be replaced no less
frequently than every five (5) years to guarantee proper operation of the MDP. (Request part # 591-0712-0)
To determine the age of the battery, check the date code located on top of the battery. The four digits refer to the year
and month of manufacture. For instance, a unit with a date code of "1035" was manufactured the 35th week of 2010.
To replace the battery first remove power to the MDP input wiring and turn off all 12 Volt loads connected to MDP.
Remove the fuse from the holder labeled "BATTERY". To access the battery, loosen and back out the two top battery
retaining bracket securing screws and loosen the single front panel screw. Pull the door out from the bottom which will
release the top edge from the engaging pins (refer to the front panel illustration below). Note only three screws need
be loosened, do not loosen / remove any other case hardware.
Once the door is removed, you will see the battery is secured in position at the top by a retaining bracket, push up on
the bracket while pulling on the plastic tab and the battery will begin to slide out of the compartment. When the ter-
minals are exposed, disconnect the push on connectors and remove the battery. NOTE: Ensure battery removal strap
is in place behind the battery before re-installing the battery. Reinstall the new battery by pushing up on the retaining
bracket and sliding the battery partially back into the compartment, re-attach the terminals (confirm proper polarity
or damage can result) and push the battery all the way back in until the retaining bracket snaps into place. Dispose
of the old battery properly. Re-tighten the two battery retaining bracket securing screws. Re-install the battery access
door and tighten its single screw. Although the battery is sealed, it is a Lead-Acid type, so there are restrictions on its
disposal.
Battery Access Dooor
Front Panel Screw
TEST / TROUBLESHOOTING
Refer to the status LED indicator section above, which provides diagnostics of what stage the MDP is currently
operating.
1) Testing Battery Back-up Function:
With a load connected to MDP output remove input fuse and confirm load is powered without interruption from
MDP internal battery: The two GREEN LED's ("CHARGING" & "INPUT CONNECTED") should extinguish and the
AMBER "Back-up Power" LED will illuminate.
2) Start-up:
When connecting or reconnecting input power to the MDP it is normal for the "INPUT CONNECTED" LED & "BACK-
UP POWER" LED to both illimunate for 2-3 seconds.
3) Charging LED:
It is normal for the CHARGING LED to extinguish when the three stage charger goes in to sleep mode. (Sleep mode
reduces MDP input current draw when the internal battery is full charged.)
4)
If fuses blow repeatedly, this usually indicates a shorted component. Contact NEWMAR for further trouble shooting
advice. Always verify that the replaced fuses are of the correct rating. Use standard ATC fuses. Do no use slow-
blow fuses.
P.O. Box 1306
Newport Beach
California 92663
Battery Retaining
Bracket Securing Screws
MDP Battery
Pull Tab on Battery
Removal Strap
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www.newmarEVpower.com
Battery Terminals
E-Mail: techservice@newmarpower.com
5
Phone: 714-751-0488
Fax: 714-957-1621
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