Protection Mode; Charge Mode (Not Available On All Models); Figure 12, Automatic 4-Stage Charging Graph - Magnum Energy MM Series Owner's Manual

Protection Mode

The inverter is protected against fi ve fault conditions, and in normal
usage it will be rare to see any. If there is a situation the inverter can't
handle, then it will shut down and attempt to protect itself, the battery
bank, and your appliances. If there is a condition that causes one of
the following fi ve faults to be enabled, refer to the Troubleshooting
section to diagnose and clear the fault.
• Low Battery - Whenever the battery voltage falls to a low level (10
VDC, default setting) for more than one minute, the inverter will
shut down to protect the batteries from being over-discharged.
• High Battery - In the event the battery voltage exceeds a high
voltage level (15.5 VDC), the inverter will automatically shut down
— along with all connected loads — to protect the loads from un-
regulated AC output voltage.
• Overload - While inverting, the AC and DC sides are monitoring the
current levels. In the event of a short-circuit or overload condition,
the inverter will shut down.
• Over-temperature - If internal power components begin to exceed
their safe operating temperature level, the inverter will shut down to
protect itself from damage.
• Internal Fault - The inverter continually monitors several internal
components and the processor communications. If a condition oc-
curs that does not allow proper internal operation, the inverter will
shut down to protect itself and the connected loads.

Charge Mode (not available on all models)

Some MM Series models are equipped with a multi-stage battery
charger feature. This includes an automatic 4-stage charging process:
Bulk, Absorb, Float and Full Charge; and a manual charge stage:
Equalization (the ME-RC50 is required to enable Equalization charge).
The automatic 4-stage charge process provides complete recharging
and monitoring of the batteries without damage due to overcharging.
DC
Voltage
DC
Current

Figure 12, Automatic 4-Stage Charging Graph

© 2010 Magnum Energy, Inc.
Bulk Absorb
Charging Charging
Bulk volts
Bulk and Float voltage settings are
determined by the 'Battery Type' selection
Constant
Increased
Voltage Voltage
Time
'Adj
Charge
Rate'
Absorb Time
Setting
(d etermin ed b y
th e 'Ad j Batt
Amp H rs' settin g )
Constant Reduced
Current Current
3.0 Operation
Float Full
Charging Charge
Float
volts
Reduced Monitored
Voltage Voltage
Goes to Full
Charge after 4
hours in Float
Charge
Monitored
No Current
Current
23