Stacking Fault Messages - Magnum Energy ME-ARC Series Owner's Manual

• Overtemp – This fault message indicates the inverter/charger has shut
down because the internal power components (FET's and/or Transformer)
have exceeded their safe temperature operating range. When the unit has
cooled down the fault will automatically clear and the unit will restart and
continue operation.
Remedy: If the fault occurs while inverting, reduce the load on the
inverter. If it occurs while charging, turn down the charge rate. If
this fault happens often, ensure the inverter is not in a hot area,
has proper ventilation, and the cooling fans inside the inverter are
working.
• Stuck Relay – This fault message displays when the inverter is
"inverting", but has determined that the internal AC pass-thru relay that
should be open while inverting, is closed.
Remedy: The AC pass-thru relay is most likely stuck. A relay usu-
ally sticks because of damage to the contacts from trying to handle
currents greater than they are rated. This is usually caused by not
protecting the relay from handling high continuous currents, or by
switching high current inductive loads. The internal relay contacts are
rated to handle 30 amps AC continuously and should be protected
with a breaker sized no larger than 30 amps. If you are connected
to an AC source (grid or generator) and running large inductive
loads (i.e. pumps, motors, etc.) on the inverter output, turn those
particular loads off prior to removing the AC input source. This fault
requires an inverter or power reset to clear.
• Tfmr Overtemp – This fault message displays when the transformer
causes the inverter to shut down to protect the internal power transformer
from damage. Once the transformer cools down, the inverter automatically
restarts and resumes operation.
Remedy: If the fault occurs while inverting, reduce the load on the
inverter. If while charging, turn down the charge rate. If this fault
occurs often, ensure the inverter is in a cool location, has adequate
ventilation, and the internal cooling fans are operational.
• Unknown – This fault message displays when the inverter/charger has
sent a fault code that cannot be identified by the remote.
Remedy: For more information or assistance in identifying the actual
fault status, contact Magnum Energy Technical Support.

5.3.4.2 Stacking Fault Messages

A fault condition may occur when multiple inverters are connected or stacked
together that is not possible on a single inverter installation.
• StackClock – There is a stacker cable problem; or, one inverter is losing
synchronization with the other inverter.
Remedy: Ensure you are using the correct stacking cable (is not a
telephone/data cable, is a custom made cable). Inspect the stacker
cable and reconnect at both ends (listen and make sure you hear
an audible "click" from the connectors at both inverters).
Info: This fault has been known to occur when a Magnum Energy
accessory is plugged into the Stack Port, but the installation is not
using multiple inverters in a stacked confi guration. If this occurs,
perform an inverter reset (see Section 6.2).
© 2012 Magnum Energy, Inc.
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