Magnum Energy Series Stacking Cable Kit (ME-SSI) - Manual (Page 25)

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2010 Magnum Energy, Inc.
Troubleshooting
20
Troubleshooting
Inverter Faults
Both units will shut down if either has an auto-resetting fault
condition (such as high battery, low battery, or over-temperature).
Both inverters will automatically come back on when the fault con-
dition has been cleared.
If one or both units experience any of the manual reset fault con-
ditions, like a continuous AC overload or internal faults, both units
will shut down. These types of faults require a manual reset by
pushing one of the inverters’ Power ON/OFF switch (or by pressing
the INVERTER ON/OFF switch on the remote control if available).
If there are remote controls used in the system, the inverter/re-
mote combination with the fault will display the actual fault while
the other inverter will display “Stack Mode Fault”, which means the
other unit has the fault.
Stacking Faults
Info: Having a remote for each inverter (two remotes)
makes it easier to troubleshoot stacking faults.
In a series stacked confi guration, your remote may display a fault
condition not possible on a single inverter installation:
Stack Mode Fault
There is a problem with the “other” inverter. Check the remote
display of the other unit to determine the fault condition that
must be cleared.
StackClock Fault
There is a stacker cable problem; or, one inverter is losing syn-
chronization with the other inverter.
StackPhase Fault
There is a problem with the AC input wiring; or, one phase was
lost from the AC input source; or, one of the inverter’s internal
transfer relay is bad; or, the inverter’s AC input circuit breaker
may be open.
Troubleshooting Tips
If there is no 240VAC output, ensure that the Status LEDs on
both inverters blink in synchronization (the sync detection blinks
9 times total) when DC power is fi rst connected. This is a stacker
test and signifi es that both units have autoconfi gured for Stacker
mode. The DC voltage must be connected to both inverters within
15 seconds of each other.
If both units are in Inverter mode and then shut down, inspect
the stacker cable and reconnect at both ends, ensuring an audible
“click” at both inverters. Try to watch when the shutdown happens
to determine the fault. If a remote control is available, monitor its
display to reveal which fault is happening.