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ELECTRICAL
Protection Circuitry Operation
LOW BATTERY
The inverter shuts o
ff
whenever the battery voltage falls
to the LBCO (Low Battery Cut Out) level to protect the
batteries from being over-discharged. After the inverter
has reached the LBCO level and turns o
ff
, the inverter
automatically restarts after one of the following conditions
are met:
1. AC Power is applied and the inverter begins
operating as a battery charger.
2. Battery voltage rises to the LBCI (Low Battery Cut In)
level.
HIGH BATTERY
In the event the battery voltage approaches the HBCO
(High Battery Cut Out) level, the inverter automatically
shuts down to prevent it from supplying unregulated
AC output voltage. The inverter’s status LED turns o
ff
when a high battery fault condition occurs. The inverter
automatically restarts when the battery falls to the HBCI
(High Battery Cut In) level.
OVERLOAD
During inverter and standby operation, the inverter
monitors the DC and AC current levels. In the event of a
short-circuit or an overload condition for more than a few
seconds, the inverter will shut down. To start operating
after this fault, the inverter must be restarted (turned back
on) once the inverter’s AC loads are reduced/removed.
OVER-TEMPERATURE
If internal power components begin to exceed their safe
operating temperature level, the inverter shuts down to
protect itself from damage. The inverter’s status LED turns
o
ff
to indicate the over-temperature fault condition. The
inverter automatically restarts after the unit cools down.
INTERNAL FAULT
The inverter continually monitors several internal
components and the processor communications. If a
condition occurs that does not allow proper internal
operation, the inverter shuts down to protect itself and the
connected loads. The inverter needs to be reset to start
operating.
This should only be performed by a qualified technician.
IMPORTANT
!
CAUTION
!
If removing all battery power (positive and negative)
to the inverter, do not remove the DC negative
connections to the inverter or any accessory until
after all positive battery connections have been
disconnected. This will prevent damage to the
inverter or to any network connected accessory.
VERY FAST FLASH
Blinks on/o
ff
very quickly/flutters: Indicates the inverter
is in EQ charge mode (requires remote to enable), or the
inverter is continuously in reset. If a remote was not used
to enable the equalize charge, then the inverter is likely in
reset. Refer to the Troubleshooting section of Magnum’s
owner’s manual to help diagnose/clear the fault condition.
ON
Solid: Indicates bulk charging, and the inverter is in
Standby mode (the external AC power that is connected
to the inverter’s input is passing through the inverter and
is powering the AC loads connected to the inverter’s
output).
Resetting The Inverter
PERFORMING AN INVERTER RESET
To perform an inverter reset (also known as a “soft reset”):
1. Press and hold the Power ON/OFF push button for
approximately fifteen (15) seconds until the Charging/
Inverting Status LED comes on and fl ashes rapidly.
2. Once the rapid fl ashing has begun, release the
Power ON/OFF push button. The Status LED will go
o
ff
after the push button is released.
3. After the inverter reset is completed, press the ON/
OFF push button to turn the inverter on. If the inverter
reset fails, you will need to perform a power reset
using the procedure below. In either case, if an
internal fault does not clear, the inverter will require
repair at an Authorized Service Center.
PERFORMING A POWER RESET
To perform a power reset (also known as a “hard reset”):
1. Open the inverter’s positive DC disconnect (or
disconnect the positive battery cable to the inverter).
2. Ensure the inverter(s) and the remote are
disconnected from all AC and DC power (the remote
display will be blank).
3. After the inverter(s) has been disconnected from all
power for 30 seconds, reconnect the inverter DC
disconnects (or reconnect the positive battery cable)
and resume operation.
Left Side Features
The left side of MS Series inverters are equipped with the
following features:
1. Exhaust Air Vents – ventilation openings that allow
heated air to be removed by the internal cooling fan.
2. Model/Serial Number Label – includes model/serial
number information, date of manufacture, and inverter
and charger specifications.
3. AC Access Cover – provides access to the internal
AC wiring terminal block. This terminal block is used
to hardwire all inverter AC input and output wiring
connections. Remove the two screws to access the
AC wiring terminal block.
Note:
The MS2000 models
do not have the AC wiring terminal block.
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