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52
5.0 Operation
Stack Mode Fault
appears on the
LCD. The FAULT (red) LED is on. The
PWR (green), CHG (green), and INV
(green) LEDs are off.
FAULT
PWR
CHG
INV
Stack Mode Fault
Settings/Info..
Figure 5-33, Stack Mode Fault
StackPhase Fault
appears on the
LCD. The FAULT (red) LED is on. The
PWR (green), CHG (green), and INV
(green) LEDs are off.
FAULT
PWR
CHG
INV
StackPhase Fault
Settings/Info..
Figure 5-34, StackPhase Fault
• 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.
• StackPhase Fault
–
1. The AC input wiring is incorrect; 2. One phase
was lost from the AC input source; 3. One of the inverter’s internal transfer
relays 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).
• StackClock Fault
– There is a stacker cable problem; or, one inverter
is losing synchronization with the other inverter.
Remedy:
Ensure you are using a Magnum Stacking Cable (this is
not a telephone/data cable, this 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 inverter’s Stack port, but the instal-
lation is not using multiple inverters in a stacked con
fi
guration. If
this occurs, perform an inverter reset (see Section 6.2).
FAULT
PWR
CHG
INV
StackClock Fault
Settings/Info..
Figure 5-32, StackClock Fault
StackClock Fault
appears on the
LCD. The FAULT (red) LED is on. The
PWR (green), CHG (green), and INV
(green) LEDs are off.
5.3.3.2 Stacking Fault Messages
A fault condition may occur when two inverters are stacked in series—using
the stacking interface—that is not possible on a single inverter installation.
Refer to the following fault messages to help troubleshoot the inverters.