Troubleshooting Field Controllers
Observe the Status LEDs on the front of the field
controller and see Table 9 to troubleshoot the controller.
To troubleshoot a local controller display, refer to
the DIS1710 Local Controller Display Technical Bulletin
(LIT-12011270).
LED status and description table
Table 9: Status LEDs and descriptions of LED states
LED label LED color Normal LED state Description of LED states
POWER Green On Steady
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
FAULT Red Off Steady
Off Steady = No Faults
On Steady = Device Fault; no application loaded; Main Code download required,
if controller is in Boot mode, or a firmware mismatch exists between the FEC and
the ZFR1811 Wireless Field Bus Router.
Blink - 2 Hz = Download or Startup in progress, not ready for normal operation
SA BUS Green Blink - 2 Hz
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
FC BUS Green Blink - 2 Hz
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
EOL Amber
Off (Except on
terminating
devices)
On Steady = EOL switch in ON position
Off Steady = EOL switch in Off position
Repair information
If a controller fails to operate within its specifications,
replace the controller. For a replacement controller,
contact your Johnson Controls representative.
For the MS-FEC2611-0U and MS-FEC2621-0U models that
are UL 864 10th Edition UUKL/ORD-C100-13 UUKLC listed
for smoke control, contact the Johnson Controls Repair
Center in Louisville, Kentucky, at 1-502-671-7312.
FEC26 Field Equipment Controllers Installation Guide 21
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