Troubleshooting Tips; Inverter Problems; Charger Problems - Magnum Energy ME-MR Owner's Manual

6.0 Troubleshooting
6.1

Troubleshooting Tips

6.1.1

Inverter Problems:

• Inverter turned on, the INV LED on the remote is blinking, no
output: Inverter is in Search mode. Either defeat Search mode—if not
needed—or turn on loads greater than the Search Wat t s setting.
6.1.2

Charger Problems:

• Unit won't transfer to Charge mode with AC applied: Measure the
input AC voltage, it should be 120 VAC +/– 20 VAC, (export models: 230
VAC +/– 40 VAC). Also, check that the VAC Dropout setting on the remote is
80 VAC (150 VAC for export models) or less.
• Transfer relay closes, and 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 and check for improvements. If
the cycling continues, back off the Charge Rat e setting from 100% to 10%.
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. Check
the remote for indication of a fault.
• Charger not charging even though the remote says "Charging":
Full charge rates are not obtained in Charge status, only after this mode
changes to "Bulk", "Absorb," or "Float ".
• Charger not charging even though the remote says "Bulk" (or
"Absorb"): Check the DC amps meter and the DC voltmeter on the ME-
MR 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 Charge Rat e setting and verify the setting
is 80% or greater. Still low charge rate? Check the AC I N setting to verify
the setting. If no AC loads are being passed through the inverter, the AC I N
setting must be 15 amps (25 amps for 3kW unit) or greater, to receive a full
charge rate.
• Remote displays "Float" not "Bulk" when the AC is fi rst plugged
in: Check DC volts on the ME-MR 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 try and keep the input voltage above 90 VAC;
also check the AC I N and Charge Rat e 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 decrease if the temperature around the BTS is higher than
77°F (25°C).
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