The CPU light condition allows for limited troubleshooting of Expansion Modules
Expansion modules require troubleshooting and the CPU light offers some information
- The expansion module closest to the controller will blink once at a 2Hz rate. A second module connected to the first expansion module will display 2 short blinks every 2 seconds
- Incompatible or malfunctioning expansion modules may display the CPU light as a steady ON or ON and then completely OFF
- When main power supply does not provide enough power for the controller and connected expansion modules, the CPU light of expansion module display a steady ON.