4.0 Maintenance And Troubleshooting; Recommended Inverter And Battery Care; Storage For Mobile Installations; Troubleshooting - Magnum Energy ME3112-U Owner's Manual

4.0 Maintenance and Troubleshooting

The following information is provided to help you keep your ME Series inverter/charger in optimum
operational condition.
4.1

Recommended Inverter and Battery Care

The ME Series inverter/charger is designed to provide you with years of trouble-free service. Even
though there are no user-serviceable parts, it is recommended that every 6 months you perform the
following maintenance steps to ensure optimum performance and extend the life of your batteries.
WARNING: Prior to performing the following checks, switch off both the AC and DC
circuits.
• Visually inspect the batteries for cracks, leaks, or swelling—replace if necessary.
• Use baking soda to clean and remove any electrolyte spills or buildups.
• Check and tighten all battery hold down clamps (if applicable).
• Clean and tighten all battery terminals and connecting cables [10 to 12 lbf-ft
(13.6 to 16.3 N-m)].
• Check and fi ll battery water levels (Liquid Lead Acid batteries only).
• Check individual battery voltages (load test those that have a voltage difference of more
than 0.3 VDC from each other)—replace if necessary.
• Check all cable runs for signs of chafi ng—replace if necessary.
• Check the inverter's cooling vents—clean as necessary.
• Check and tighten the inverter's internal AC terminal block connections
[16 lbf-in (1.8 N-m)].
4.2

Storage for Mobile Installations

When placing the RV, boat, or truck into storage, it is recommended that you perform the following
to ensure the system is properly shut down (or properly confi gured for storage). This is especially
important for maintaining the batteries.
• Perform the recommended maintenance steps listed in Section 4.1.
• Fully charge the batteries.
• Connect AC power (if available) and verify the breaker to the inverter's input is switched
ON (to allow battery charging).
• Verify the inverter is switched OFF.
• Switch OFF all unnecessary AC and DC loads.
• Disable the AGS (if installed) when the RV, boat, or truck is in a confi ned storage area.
WARNING: If an AGS were to start and run the generator for an extended period
of time in a confi ned area, a potentially fatal level of carbon monoxide (CO) could
accumulate.
4.3

Troubleshooting

The ME Series inverter/charger is a fairly simple device to troubleshoot. The following chart is
designed to help you quickly pinpoint the most common inverter failures.
Symptom Possible Cause
No output power. Inverter is switched OFF
Inverter LED is
Battery voltage is too low.
OFF.
The battery voltage level has
dropped below the Low Battery
Cutout (LBCO) set-point for
more than one minute.
© 2017 Sensata Technologies

Table 4-1, Basic Troubleshooting

Maintenance and Troubleshooting
Recommended Solution
Switch the inverter ON.
Check fuses/circuit-breakers and cable
connections. Check battery voltage at the
inverter's terminals. Your batteries may
need to be charged, this fault condition will
automatically clear when the battery voltage
exceeds the LBCI voltage.
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