Troubleshooting; Table 4-1, Basic Inverter Troubleshooting (Remote Not Available) - Magnum Energy MagnaSine Hybrid Mobile Series Owner's Manual

Maintenance and Troubleshooting
4.3

Troubleshooting

The MSH-M 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.

Table 4-1, Basic Inverter Troubleshooting (Remote not available)

Symptom Possible Cause
N o o u t p u t p o w e r. Inverter is switched OFF.
Inverter LED is OFF.
Battery voltage is too low. The battery
voltage level has dropped below the
Low Battery Cutout (LBCO) set-point
for more than one minute.
The battery voltage is too high. The
inverter automatically resets and
resumes operation when the battery
voltage drops to the HBCI voltage or
lower.
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.
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.
N o o u t p u t p o w e r. Unit is in Search mode, which means
Green LED is fl ashing load is too small for Search mode
ON once every second. circuit detection.
No output power. Green Unit is in continuous reset.
LED is flashing very
quickly—fl uttering.
Low output or surge Loose or corroded battery cables.
power. Green LED is
Low batteries.
fl ashing.
Loose AC output connections.
Battery cables are the wrong length
or gauge.
L o w c h a r g i n g ra t e Charge rate backing off due to high
when connected to AC temperature inside inverter.
power.
Low AC input voltage (<90 VAC).
Low charging rate when Generator output is too low to power
using a generator. both load and charger.
C h a r g e r d o e s n o t Loose or corroded battery cables.
charge.
Defective batteries.
Wrong AC input voltage.
While charging, the If the Battery Temperature Sensor
DC charge voltage is (BTS) is installed, the DC voltage will
higher or lower than increase or decrease depending on the
expected. temperature around the BTS.
Page 41
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.
This condition usually only occurs 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 over-temp shutdown if
the cause was too many loads for the ambient conditions.
Check ventilation around the inverter, ensure cool air
is available to pass through the inverter (refer to the
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, an inverter reset is required, see
Section 4.4 to perform an inverter reset.
Turn on a load greater than 5 watts to bring inverter to
full output power.
Check that the inverter Power ON/OFF switch is not stuck
in the ON position (ensure you can feel a click when
pushing). If not, the inverter requires repair/service.
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.
Provide better inverter ventilation/cooling, or additional
battery chargers may be needed if battery bank is very
large.
Check AC input wiring.
Reduce the load, increase the generator's RPMs.
Clean and tighten battery cables.
Replace batteries.
Verify proper AC input voltage and frequency.
This is normal; see Section 3.5 (Battery Temperature
Sensor Operation) for more information.
© 2013 Magnum Energy, Inc.