©2009 Magnum Energy Inc.
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Operation
5.3.3.3 Stacking Fault Messages
– A fault condition may occur when
two inverters are stacked in series - using the stacking interface to provide
120/240VAC output - that is not possible on a single inverter installation.
Refer to the following fault messages to help troubleshoot the inverters.
StackClock Fault
- There is a stacker cable problem or one inverter is
losing synchronization with the other inverter.
Remedy:
1. Ensure you are using a Magnum Stacking Cable (this is
not a telephone/data cable, this is a custom made cable). 2. 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 con
fi
guration. If this occurs,
perform an inverter reset (see section 6.2).
Stack Mode Fault -
This unit has detected a problem with the “other”
stacked inverter, check that unit for a fault condition.
Remedy:
This fault will automatically clear when the fault with
the other inverter is corrected.
Stack Phase Fault -
1.The AC input wiring is incorrect; or 2.One phase
was lost from the AC input source; or 3.One of the inverter’s internal transfer
relay is bad; or 4.The inverter’s AC input circuit breaker may be open.
Remedy:
If this fault doesn’t clear after checking these four recom-
mendations; perform an inverter reset (see section 6.2).
•
•
•
StakMode
appears on the LCD and
the FAULT (red) LED is on. The INV
(green) LED’s is off.
E R R OR!
S taK M ode
Figure 5-26, Stack Mode Fault
Stak CLK
appears on the LCD and
the FAULT (red) LED is on. The INV
(green) LED’s is off.
E R R OR!
S tak C LK
Figure 5-25, StackClock Fault
StkPhasL
appears on the LCD and
the FAULT (red) LED is on. The INV
(green) LED’s is off.
E R R OR!
S tkP hasL
Figure 5-27, StackPhase Fault
