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2017 Sensata Technologies
Maintenance and Troubleshooting
Table 5-3, Stack Fault Code Descriptions
FAULT LED
ON
No Stack Comm
- The PT controller will not run because stacking has been
enabled (DIP switch 10 is set UP), but the controller is not receiving any network
communications from the Magnum inverter.
Remedy:
This fault can be caused by:
1. Stacking mode was inadvertently/incorrectly enabled (DIP switch 10 set UP).
a. Disable stacking (if it is not needed) by setting DIP switch 10 to DOWN.
2. An open, incorrect or disconnected network cable.
a. Examine the network cable for any damage, and replace if needed.
b. Ensure the correct network cable is used (see Figure 2-21).
c. Ensure the network cable is connected to the inverter’s and controller’s
NETWORK port. Listen and make sure you hear an audible “click” when
inserting the connector into the networks ports.
d. Inspect both ends of each cable to ensure they are clean and not damaged;
also inspect the ports to ensure there is no debris or damage.
e. Try another network cable.
3. The inverter is not powered, or its NETWORK communication port is faulty.
a. Ensure the inverter has power and is able to turn on and off.
b. If the remote is powered and communicating, then the remote port is
working; in this case, remove the network cable from the NETWORK port and
connect it to the inverter’s REMOTE port to see if it now starts communicating.
The fault will automatically clear and the controller will begin operation once the
controller is able to communicate on the network.
FAULT LED
BLINKING
Stack Comm Lost
- The controller was previously communicating on the network,
but now it is no longer receiving any communications from the Magnum inverter
or from another controller.
Note:
The controller continues to run with this fault.
Remedy:
This fault can be caused by:
1. A stack or network cable was damaged or disconnected.
a. Examine the cables for any damage and replace if needed, or try another
remote and/or stack cable.
2. The network or stack cable has been disconnected or the connection is now bad.
a. Inspect both ends of each network or stack cable to ensure they are clean
and not damaged; also, inspect the inverter’s and controller’s NETWORK ports
and the controller’s stack ports to ensure there is no debris or damage.
3. The inverter is no longer powered or its communication port is faulty.
a. Ensure the inverter has power and is able to turn on and off.
b. If the remote is powered and communicating, then the remote port is
working; in this case, remove the network cable from the NETWORK port and
connect it to the inverter’s REMOTE port to see if it now starts communicating.
The fault will automatically clear and the controller will resume operation once it
receives communications from the network (or from another controller).
This fault can also be manually cleared by pressing the RESET button on the front
of the PT controller for a minimum of two seconds.
Info:
Even though network communications has stopped, all network settings
in the controller remain until disconnected from both PV and battery power.
5.4 Stacking Fault Codes
When multiple PT controllers are connected together in a stacked con
fi
guration, additional fault
conditions can be detected and will appear in the digital display to identify the problem. The following
table describes each fault code (F2#) and any corrective actions to be taken for each code.
