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3.0
Operation
3.1
Operating Modes
The MM Series inverter has two normal operating routines. Inverter mode,
which powers the loads using the batteries, and Standby mode, which transfers
the incoming AC power (i.e., shorepower or a generator) to power the loads
and recharge the batteries. This inverter also includes an extensive protection
circuitry that shuts down the inverter under certain fault conditions.
3.1.1
Invert Mode
When the inverter is fi rst powered up, it defaults to the OFF mode. The
momentary ON/OFF power switch (Figure 1-2, Item 2) must be lightly pressed
to turn the inverter on. Subsequently pressing this switch alternately turns
the inverter off and on.
•
Inverter OFF – When the inverter is off, no power is used from the
batteries to power the AC loads and the status LED will be off. If AC
power from an external source (shorepower or generator) is connected
and qualifi ed on the inverter's AC input, this AC input power will pass
through the inverter to power the AC loads. However, if this AC power
is lost, the AC loads will no longer be powered because the inverter is
off. When the inverter is turned on, it operates either by "Searching" or
"Inverting", depending on the connected AC loads.
•
Searching – When the inverter is fi rst turned on, the automatic Search
feature is enabled. This feature is provided to conserve battery power
when AC power is not required. In this mode, the inverter pulses the AC
output looking for an AC load (i.e., electrical appliance). Whenever an
AC load (greater than 5 watts) is turned on, the inverter recognizes the
need for power and automatically starts inverting. When there is no load
(or less than 5 watts) detected, the inverter automatically goes back into
Search mode to minimize energy consumption from the battery bank.
When the inverter is "Searching", the inverter's green LED fl ashes.
Info: The factory default value for the Search feature is 5
watts. It can be turned off or adjusted from 5 to 50 watts
using the ME-RC50 remote display.
•
Inverting – When a load greater than 5 watts is connected to the
inverter output, the MM Series "inverts" the DC power from the battery
and supplies 120 VAC power to your sub-panel. The inverter's green LED
fl ashes once every 2 seconds to indicate it is inverting. The amount of
time the inverter can be inverting and providing power is directly related
to the amount of AC loads that are connected, and the capacity of the
battery bank.
3.1.2
Standby Mode (MM1212/MM1212-G models)
The MM1212/MM1212-G Series models feature an automatic transfer relay
and an internal battery charger when operating in Standby mode. Standby
mode begins whenever AC power (shorepower or generator) is connected to
the inverter's AC input. Once the AC voltage and frequency of the incoming
AC power is within the AC input limits, an automatic AC transfer relay is
activated. This transfer relay passes the incoming AC power through the
inverter to power the AC loads on the inverter's output. This incoming power
is also used to activate a powerful internal battery charger to keep the battery
bank charged in case of a power failure.
© 2016 Sensata Technologies
Operation
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