Troubleshooting; Basic Troubleshooting - Magnum Energy ME Series Operator's Manual

1. Basic Troubleshooting

T h e M E Se r i e s i n v e r t e r / c h a r g e r i s a f a i r l y s i m p l e d e v i c e t o t r o u b l e s h o o t . T h e r e
a r e o n l y t w o a c t i v e c i r c u i t s ( A C a n d D C ) a s w e l l a s a c h a r g i n g c i r c u i t . T h e
f o l l o w i n g c h a r t i s d e s i g n e d t o h e l p y o u q u i c k l y p i n p o i n t t h e m o s t c o m m o n i n v e r t e r
f a i l u r e s .
WARNING: De -energize all sources of power including batteries ( D C ) , shore power ( A C ) , and AC
generator (as applicable).
Symptom
No output power.
Inverter LED is OFF.
No output power.
Inverter LED is OFF.
No output power.
Green LED is flashing.
Low output power.
Appliances turn OFF/ON.
Green LED is flashing.
AC output voltage seems
too low when using a meter.
Low surge power.
Low charging rate
when connected to
shore power.
Low charging rate
when using a generator.
Charger doesn't charge.
Ó 2003 - Magnum Energy, Inc.
Possible Cause
Inverter is switched OFF.
Battery voltage is too low.
High or low battery voltage.
Load is too small for search
mode circuit detection.
Low batteries.
Loose or corroded battery cables.
Low batteries.
Loose AC output connections.
Wrong type of voltmeter used
(displays 80 VAC to 100 VAC).
Low batteries.
Battery cables are the
wrong length or gauge.
Charge rate set too low.
Low AC voltage (< 90 VAC).
Generator output is too low
to power both load and charger.
Loose or corroded battery cables.
Defective batteries.
Wrong charger settings.
Wrong AC input voltage.

4. TROUBLESHOOTING

Recommended Solution
Switch the in verter ON.
Check battery voltage, fuses,
breakers and cable connections.
Check the battery voltage at
the inverter's terminals.
Discharge or charge batteries.
Replace the batteries.
Reduce the search threshold
or defeat search mode.
Check and recharge batteries.
Clean and tighten all cables.
Recharge or replace batteries.
Tighten AC output connections.
Use a "true" RMS voltmeter.
Check and recharge batteries.
Verify recommended cable lengths
and gauges from the manual.
Replace cables as necessary.
Adjust charge rate from remote.
Check AC input wiring.
Reduce the load.
Increase the generator's RPMs.
Clean and tighten battery cables.
Replace batteries.
Adjust the charger settings.
Verify proper AC input
voltage and frequency.
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