
Table 8: Status LEDs and Descriptions of LED States
Description of LED States
Normal LED
State
LED Color
LED Label
Off Steady = No Supply Power or the controller’s polyswitch/resettable fuse
is open. Check Output wiring for short circuits and cycle power to controller.
On Steady = Power Connected
On Steady
Green
POWER
Off Steady = No Faults
On Steady = Device Fault; no application loaded; Main Code download
required, if controller is in Boot mode
Blink - 2 Hz = Download or Startup in progress, not ready for normal operation
Off Steady
Red
FAULT
Blink - 2 Hz = Data Transmission (normal communication)
Off Steady = No Data Transmission (N/A - auto baud not supported)
On Steady = Communication lost, waiting to join communication ring
Blink - 2 Hz
Green
SA BUS
Blink - 2 Hz = Data Transmission (normal communication)
Off Steady = No Data Transmission (auto baud in progress)
On Steady = Communication lost, waiting to join communication ring
Blink - 2 Hz
Green
FC BUS
On Steady = EOL switch in ON position
Off Steady = EOL switch in Off position
Off (Except on
terminating
devices)
Amber
EOL
Repair Information
If a controller fails to operate within its specifications, replace the controller. For a replacement controller, contact
your Johnson Controls representative.
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FEC1611 and FEC1621 Field Equipment Controller Installation Instructions