LED status and description table
Table 8: 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.
Blink - 2 Hz = Download or Startup in progress, not ready for normal operation
Rapid blink = SA Bus communications issue
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
Repair information
If the controller fails to operate within its specifications,
replace the controller. For a replacement controller,
contact your Johnson Controls representative.
FX-PCA4911 Advanced Application Controller Installation Guide 19
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