©2013 Magnum Energy, Inc.
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6.0 Troubleshooting
6.1
Inverter/Charger Troubleshooting Tips
6.1.1 Inverter Problems
• Inverter turned on, green INV LED on inverter blinking, no
output:
Inverter is in Search mode. Either turn off Search mode—if not
needed—or turn on loads greater than the
Search Watts
setting.
6.1.2 Charger Problems
• Unit won’t transfer to Charge mode with AC applied:
Is charge
(CHG) LED on remote blinking? If not, then the charger does not recognize
the incoming AC being within acceptable limits. Measure the input AC voltage
at the inverter input terminals—should be / 20 VAC (230 VAC +/-
40 VAC for export models). Also, check that the
VAC Dropout
setting on the
remote is 80 VAC or less (160 VAC or less for export models). If the CHG LED
is blinking, the transfer relay should close within 20 seconds and the unit
should then begin charging. If the LED is on solid, the transfer relay should
be closed and the charger should be charging.
• Transfer relay closes, then opens and continues to cycle:
AC
voltage is too low, or has transients that drop the AC voltage momentarily.
Change the
VAC Dropout
setting to 60 VAC (110 VAC for export models) and
check for improvements. If the cycling continues, back off the
Charge Rate
from
100%
to
10%
(or
OFF
, if available).
This cycling may also occur if the AC output of the inverter is connected to
the inverter’s AC input. Check for proper input and output AC wiring.
• Charger not charging even though CHG LED is on steady and the
unit says “
Charging
”:
Full charge rates are not obtained in Charging mode,
only obtained after this mode changes to Bulk Charging, Absorb Charging, or
Float Charging modes.
• Charger not charging even though CHG LED is on steady and the
unit says “
Bulk Charging
” (or “
Absorb Charging
”):
Check the
DC Amps
and the
DC Volts
meters on the ME-RC display, it should be 80% or more of
rated charge current if the battery voltage is under 14.0 VDC (28.0 VDC on
24-volt models or 48.0 VDC for 48-volt models). If not, check the
05 Charge
Rate
setting and verify the setting is 80% or greater. Still low charge rate?
Check the
Shore Max
setting to verify. If no AC loads are being ‘passed thru’
the inverter, the S
hore Max
setting must be 15 amps (25 amps for 3kW unit)
or greater, to receive full charge rate.
• Charger says “
Float Charging
” not “
Bulk Charging
” when the AC
is
fi
rst plugged in:
Check the
DC Volts
meter on the ME-RC display. If
the battery is over 13.0 VDC (26.0 VDC for 24-volt models or 52.0 VDC
for 48-volt models) then the battery was already charged, and the charger
automatically goes to Float Charging to keep from overcharging the batteries.
• Charge amps are lower than expected, or is 0 amps DC:
Measure
input AC voltage and increase if the input voltage is under 90 VAC. The
charge rate is reduced to keep the input voltage above 90 VAC. Also, check
the
Shore Max
and
05 Charge Rate
settings to determine if the current is
being limited.
• Charger output voltage is higher than expected:
Check the Battery
Temperature Sensor (BTS) temperature. If the BTS is installed, the charge
voltage settings will increase if the temperature around the BTS is below 77°
F (25° C), and will decrease if the temperature around the BTS is higher than
77° F (25° C).
