Magnum Energy MS-G Series - Manual (Page 60)

Page 52
©
2015 Sensata Technologies
Maintenance and Troubleshooting
4.3 Troubleshooting
The MS-G 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 Troubleshooting
Symptom Possible Cause Recommended Solution
N o o u t p u t p o w e r.
Inverter LED is OFF.
Inverter is switched OFF. Switch the inverter ON.
Battery voltage is too low. The battery
voltage level has dropped below the
Low Battery Cutout (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 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.
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.
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-thru the inverter (refer to the ventilation
requirements in Section 2.1.3).
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.
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.
An inverter reset is required to clear fault. Remove
DC power to the inverter, or press and hold down the
inverter’s power switch for ~10 seconds (until green
Status LED lights). If fault does not clear, the unit needs
to be serviced.
N o o u t p u t p o w e r.
Green LED is fl ashing.
Inverter in reset.
Unit is in Search mode, which means
the load is too small for Search mode
circuit detection.
Turn on a load greater than 5 watts to bring inverter to
full output power, or turn off Search with remote.
Low output or surge
power. Green LED is
fl ashing.
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.
Low charging rate
when connected to AC
power.
Charge rate set too low. Adjust charge rate or SHORE settings on remote.
Low AC voltage (< 90 VAC). Check AC input wiring.
Low charging rate when
using a generator.
Generator output is too low to power
both load and charger.
Reduce the load, increase the generator’s RPMs.
Check the SHORE settings (if remote connected).
C h a r g e r d o e s n o t
charge.
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 3.5 (Battery Temperature
Sensor Operation) for more information.