Installation Manual

© 2014 Magnum Energy, Inc.Page 51
Operation
• Time Connect – AC power is present at the inverter’s AC input, but the time of day needs to
fall within the Connect time and the Disconnect time settings per the SETUP: 02C AC In - Time
menu in order for the inverter/charger to connect to the incoming AC.
• VDC Connect – AC power is present at the inverter’s AC input, but the battery voltage needs
to fall below the Connect Volts setting from the SETUP: 02D AC In - VDC menu in order for the
inverter/charger to connect to the incoming AC.
Note: Most faults (inverter, AGS, BMK, and PT controller) also alternate with the inverter/char-
ger status. See Sections 5.3.4, 7.3.3, 8.3.2, and 10.3.2 for more information on identifying and
resolving these faults.
5.3.4 Fault Mode Messages
The FAULT LED comes on and a fault status is displayed when an abnormal condition is detected.
Use the information in this section to identify and correct the issue.
Info: Many of the faults automatically clear once the fault is resolved. Some will require
a manual restart. This requires the ON/OFF INVERTER button on the remote to be
pressed and released. Finally, if the fault will not clear, an inverter reset (Section 6.2)
or power reset (Section 6.3) may be required.
• AC Backfeed – This fault causes the inverter to shut down because AC voltage from an exter-
nal AC source has been detected on the inverter’s AC output. When the unit shuts down because
of this fault condition, an inverter reset or power reset will be required to resume operation (see
Sections 6.2 & 6.3 to reset the inverter).
Remedy: This fault usually occurs because the AC output wiring is connected to (or
able to be connected to) the incoming AC source. When this fault happens, all system
wiring should be re-checked to ensure the incoming hot and/or neutral wires are not
able to be connected to the AC output.
• AC Overload – This fault message displays when the AC load on the inverter/charger’s output
has exceeded the inverter’s AC current protection limits. If the overload condition lasts for <10
seconds, the fault automatically clears and the unit restarts and resumes operation. However, if
the overload occurs for more than 10 seconds, the unit shuts down and the fault will require a
manual restart.
Remedy: This fault may occur because the connected AC loads are larger than the
inverter’s output capacity, there is a wiring short on the output, or the output wires are
incorrectly installed. Once the AC loads are reduced or the output wiring is corrected,
the inverter can be restarted after a manual restart.
• Breaker Tripped – The AC input breaker on the inverter/charger has opened due to excess
current fl ow through the inverter to the AC loads.
Remedy: After reducing the AC loads, push in the inverter’s AC input circuit breaker to
reset and resume operation.
Info: While in Charger mode, the inverter’s AC input breaker could nuisance trip if the
loads on the inverter’s output exceeds the current rating of the inverter’s input circuit
breaker.
• Dead Batt Charge – This fault indicates that the inverter has been connected to an AC
source (grid or generator), and has determined that the battery bank is either highly discharged
or not connected. The inverter is attempting to close its internal relay and to begin charging, but
has detected less than 9 volts (12-volt models), 18 volts (24-volt models), or 36 volts (48-volt
models) on the battery bank.
Remedy: Check the DC voltage at the inverter’s DC terminals and compare it with the
DC voltage at the battery bank. These two voltages should be very close (<0.5 VDC
difference). If not, check to ensure all connections are tight and the fuse/circuit breaker
between the inverter and battery bank is good.
This fault automatically clears once current fl ows into the battery from the battery
charger—this may take anywhere from a few minutes to a few hours depending on the
condition of your batteries. This fault can also be cleared if the AC input is removed.