Operation
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2017 Sensata Technologies
StackClock Fault
appears on the LCD and the FAULT
(red) LED is on. The PWR (green), CHG (green) and
INV (green) LEDs are off.
FAULT
PWR
CHG
INV
StackClock Fault
Settings/Info...
Figure 5-47, StackClock Fault
• StackClock
Fault
(StkClock)
– 1. There is a stacker cable problem; or, 2. One inverter is
losing synchronization with the other inverter.
Remedy:
Ensure you are using the RJ45 cables supplied with the router for parallel
stacking. Check to make sure you hear an audible “click” when plugging in the RJ45
cables.
Info:
This fault has been known to occur when a Magnum 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).
5.3.4.2
Stacking Fault Messages
A fault condition may occur when multiple inverters are stacked in parallel—using the router—
that is not possible on a single inverter installation. Refer to the following fault messages to help
troubleshoot the inverters.
FAULT
PWR
CHG
INV
Stack Mode Fault
Settings/Info...
Stack Mode Fault
appears on the LCD and the FAULT
(red) LED is on. The PWR (green), CHG (green), and
INV (green) LEDs are off.
Figure 5-48, Stack Mode Fault
• Stack Mode Fault (Stk Mode) –
This unit has detected a problem with another stacked
inverter, check the other units for a fault condition.
Remedy:
This fault automatically clears when the fault with the other inverter is
corrected.
FAULT
PWR
CHG
INV
StackPhase Fault
Settings/Info...
StackPhase Fault
appears on the LCD and the FAULT
(red) LED is on. The PWR (green), CHG (green), and
INV (green) LEDs are off.
Figure 5-49, StackPhase Fault
• StackPhase
Fault
(StkPhase)
–
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 these four recommendations, perform
an inverter reset (Section 6.2).
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