Magnum Energy ME3112-U Owner's Manual page 49

Maintenance and Troubleshooting
Symptom Possible Cause
No output power. Battery voltage is too high. The
Inverter LED is inverter automatically resets and
OFF. (Cont.) resumes operation when the battery
voltage drops to the HBCI voltage or
lower.
Over-temperature condition: The
internal temp 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 unit cools, it will automatically
reset and resume operation.
AC overload condition: The
inverter has turned off because the
connected loads are larger than the
inverter's output capacity, or the
output wires are shorted.
Internal fault: This fault occurs when
an internal fault is detected.
No output power. a) Unit is in Search mode, which
a) Green LED is means load is too small for Search
fl ashing (x1/sec). mode circuit detection.
b) Green LED
b) Unit is in reset.
fl ashing rapidly
(fl utters).
Low output or Loose or corroded battery cables.
surge power
Low batteries.
when inverting.
Loose AC output connections.
Battery cables are the wrong length
or gauge.
Low charging Charge rate set too low.
rate (connected
to AC power).
Low AC voltage (<90 VAC).
Low charging Generator output is too low to power
rate (using both load and charger.
generator).
Charger does not Loose or corroded battery cables.
charge.
Defective batteries.
Wrong charger settings.
Wrong AC input voltage.
Inverter AC Wrong type of voltmeter used
output voltage (will display 90 VAC to 130 VAC
is too low or too depending on the battery voltage).
high when using
an AC voltmeter.
While charging, If the Battery Temperature Sensor
DC charge (BTS) is installed, the DC voltage
voltage is will increase or decrease depending
higher/lower on the temperature around the BTS.
than expected.
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Recommended Solution
Condition usually only occurs when an
additional charging source (external charging
sources) is used to charge the battery bank.
Reduce/turn off any other charger to the
inverter batteries to allow voltage level to drop.
Reduce the number of electrical loads that you
are operating, this will avoid a repeat over-
temp shutdown if the cause was too many
loads for the ambient conditions.
Check ventilation around inverter, ensure cool
air is available to pass-thru the inverter (refer
to ventilation requirements in Section 2.1.3).
Reduce the AC loads connected to the inverter,
or remove all AC output wiring and restart the
inverter.
To clear this fault, a power or inverter reset
is required—see Section 4.4. If this fault does
not clear or returns, the unit needs servicing.
a) Turn on a load greater than 5 watts to bring
inverter out of search, or turn off search with
remote.
b) Perform a power or inverter reset—see
Section 4.4. If fault continues, unit needs to be
serviced.
Clean and tighten all cables.
Recharge or replace batteries.
Tighten AC output connections.
Verify recommended cable lengths and gauges
from the manual. Replace cables as necessary.
Adjust charge rate or SHORE settings on
remote.
Check AC input wiring.
Reduce load, increase the generator's RPMs.
Check SHORE settings (if remote connected).
Clean and tighten battery cables.
Replace batteries.
Adjust the charger settings, ensure the unit is
not in charger standby.
Verify proper AC input voltage and frequency.
Most meters are made to read Average
AC voltage. The AC output of the ME is a
"modifi ed" waveform which requires using a
"true" RMS voltmeter to correctly read the
output voltage.
This is normal; see Section 3.5 (Battery
Temperature Sensor Operation) for more
information.
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