Page 35
©
2009 Magnum Energy Inc
.
4.0 Troubleshooting
The MS-PAE Series inverter/charger is a fairly simple device to troubleshoot. There are only two
active circuits (AC and DC) as well as a charging circuit. The following chart is designed to help
you quickly pinpoint the most common inverter or charger failures.
Table 4-1, Troubleshooting Guide
Symptom
Possible Cause
Recommended Solution
Inverter is switched OFF.
Switch the inverter ON.
Battery voltage is too low. The battery
voltage level has dropped below the
Low Battery Cut Out (LBCO) set-point
for more than one minute.
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.
The battery voltage is too high. The
inverter automatically resets and
resumes operation when the battery
voltage drops to the HBCI voltage or
lower.
This condition usually occurs only when an
additional charging source (alternator, solar panels
or other external charging sources) is used to
charge the battery bank. Reduce or turn off any
other charger to the inverter batteries to allow the
voltage level to drop.
Reduce the number of electrical loads that you are
operating, this will avoid a repeat Overtemp
shutdown if the cause was too many loads for the
ambient conditions.
Check ventilation around the inverter, ensure cool
air is available to pass-thru the inverter (refer to
the ventalation requiremnts in section 2.3).
AC Overload condition: The inverter
has turned off because the connected
loads are larger than the inverters
output capacity or the output wires are
shorted.
Reduce the AC loads connected to the inverter or
remove all AC output wiring and restart the
inverter.
Internal fault: This fault occurs when
an internal fault is detected.
To clear this fault, an inverter reset is required.
Remove DC power to the inverter or press and hold
down the power switch on the inverter for 15
seconds (until the green Status LED comes on). If
this fault does not clear, the unit will need to be
serviced.
No output power. Green
LED is flashing.
Unit is in "Search Mode", which means
load is too small for search mode
circuit detection.
Turn on load greater than 5 watts to bring inverter
to full output power or turn off search with remote.
Loose or corroded battery cables.
Clean and tighten all cables.
Low batteries.
Recharge or replace batteries.
Loose AC output connections.
Tighten AC output connections.
Battery cables are the wrong length or
gauge.
Verify recommended cable lengths and gauges from
the manual. Replace cables as necessary.
Charge rate set too low.
Adjust charge rate or Shore settings with remote.
Low AC voltage (< 90 VAC).
Check AC input wiring.
Reduce the load, increase the generator’s RPMs
Check the SHORE settings (if remote connected).
Loose or corroded battery cables.
Clean and tighten battery cables.
Defective batteries.
Replace batteries.
Wrong charger settings.
Adjust the charger settings, ensure the unit is not
in charger standby.
Wrong AC input voltage.
Verify proper AC input voltage and frequency.
While charging, the DC
charge voltage is higher
or lower than expected.
If the Battery Temperature Sensor
(BTS) is installed, the DC voltage will
increase or decrease depending on the
temperature around the BTS.
This is normal; see section 3.3 (Battery
Temperature Sensor Operation) for more
information.
Over-temperature condition: The
internal temperature of the inverter
has risen above acceptable limits;
caused by loads too great for the
inverter to operate continuously, or by
lack of ventilation to the inverter.
When the unit has cooled, it will
automatically reset and resume
operation
No output power.
Inverter LED is OFF.
Low output or surge
power. Green LED is
flashing.
Charger doesn’t charge.
Low charging rate when
using a generator.
Generator output is too low to power
both load and charger.
Low charging rate when
connected to shore
power.
Troubleshooting
