©2013 Magnum Energy, Inc.
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5.0 Operation
5.3.3.2 Stacking Fault Messages
A fault condition may occur when multiple inverters are connected together
(i.e., stacked)—that is not possible on a single inverter installation.
FAULT !
Stak CLK
Stak CLK
appears on the LCD and
the FAULT (red) LED is on. The INV
(green) LED is off.
Figure 5-31, Stack Clock Fault
StakMode
appears on the LCD and
the FAULT (red) LED is on. The INV
(green) LED is off.
FAULT !
StakMode
Figure 5-32, Stack Mode Fault
StckPhas
appears on the LCD and
the FAULT (red) LED is on. The INV
(green) LED is off.
Figure 5-33, Stack Phase Fault
FAULT !
StckPhas
• Stack
Mode
Fault
–
A problem with the ‘other’ stacked inverter has
been detected, check that unit for a fault condition.
Remedy:
This fault automatically clears 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
relays is bad; or, 4. The inverter’s AC input circuit breaker may be open.
Remedy:
If this fault doesn’t clear after checking the above recom-
mendations, perform an inverter reset (see Section 6.2).
• Stack Clock 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, it is custom made). 2. Inspect the
stacker cable and reconnect at both ends (ensure you hear an au-
dible “click” from the connectors at both inverters).
Info:
This fault may occur when a Magnum Energy accessory is
plugged into the Stack port, but the installation is not using mul-
tiple inverters in a stacked con
fi
guration. If this occurs, perform an
inverter reset (see Section 6.2).
