Maintenance And Troubleshooting; Recommended Inverter And Battery Care; Rv/Marine Off-Season Storage; Resetting The Inverter - Magnum Energy MMS Series Owner's Manual

4.0

Maintenance and Troubleshooting

4.1

Recommended Inverter and Battery Care

The MMS Series inverter/charger is designed to provide you with
years of trouble-free service. It is recommended that every 6 months
you perform the following maintenance steps to ensure optimum
performance and to extend the life of your batteries.
WARNING: Prior to performing these checks, switch off
both the AC and DC circuits.
• Check batteries for cracks, leaks, or swelling – replace as needed.
• Use baking soda to clean and remove electrolyte spills or buildups.
• Check and tighten all battery hold-down clamps.
• Clean and tighten (10 to 12 ft-lbs, or 13.6 to 16.3 N m)) all DC
terminals (battery and inverter) and connecting cables.
• Check/fi ll battery water levels (liquid lead acid batteries only).
• Check individual battery voltages (replace those that vary more
than 0.3 VDC from each other).
• Check all cable runs for signs of chafi ng – replace as needed.
• Check the inverter's cooling vents – clean as necessary.
4.2

RV/Marine Off-Season Storage

When placing your coach or boat into seasonal storage, it is
recommended that you perform the following to ensure the system
is properly shut down (or properly confi gured for seasonal storage).
This is especially important for maintaining the batteries.
• Perform the recommended maintenance steps noted above.
• Fully charge the batteries.
• Connect shorepower (if available) and verify that the breaker to
the battery charger is switched ON.
• Verify the inverter is switched OFF.
• Switch off all unnecessary AC and DC loads.
4.3

Resetting the Inverter

Under some fault conditions (i.e., an internal fault), the inverter will
need to be reset. To reset the inverter:
1. Press and hold the Power ON/OFF pushbutton (Figure 1-3, Item
2) for approximately 15 seconds, or until the Status LED (Figure
1-3, Item 1) comes on and fl ashes.
2. Release the Power ON/OFF pushbutton once the fl ashing has
begun. The Status LED will go off.
3. Press the Power ON/OFF pushbutton again to turn on the inverter.
Info: The Power ON/OFF pushbutton is a small momentary
type switch—operated by lightly pressing and releasing.
© 2017 Sensata Technologies
Maintenance and Troubleshooting
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