Powering up the Pilot FC field controller initiates the Power on Self-Test (POST). During the POST the first two lights on all modules with indicator lights blink continuously to indicate the modules are starting up. Once the POST is complete the indicator lights will go to their default condition.
If an error occurs during POST the indicator lights will blink several times, pause a ½ second, then blink again. The cycle will be repeated 20 times then the module will reset itself and try to start again. Watching the blink sequence will tell you the type of error. In this guide, “known good” refers to a part you know for a fact is working.
| Light Activity | Meaning | Solution |
| 1 blink | The power module is unable to communicate with the facepack | Inspect all facepack cables for damage or loose pins. After reseating the connectors, ensure they are securely connected. If that does not resolve the issue, replace the power module with a known good power. If the problem persists, replace the facepack with a known good facepack from another controller. |
| 2 blinks | The controller cannot determine the type of one or more modules | One at a time replace the power module, communication module(s) and output module(s) with known good ones. When the problem module is identified, replace it with a new module. |
| 3 blinks | The controller cannot detect the purpose of one or more modules | One at a time replace the power module, communication module(s) and output module(s) with known good ones. When the problem module is identified, replace it with a new module. |
| 4 blinks | The controller cannot determine if the one or more modules is in a wide (blue) or narrow (green) position | One at a time replace the power module, communication module(s) and output module(s) with known good ones. When the problem module is identified, replace it with a new module. |
| 5 blinks | The controller cannot identify the slot number for one or more modules. | One at a time replace the power module, communication module(s) and output module(s) with known good ones. When the problem module is identified, replace it with a new module. |
If the solutions in table 1 do not identify the problem, inspect the sockets the modules plug into and examine the circuit board holding the sockets.
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