ELTS2 controller stuck in Emergency
Symptoms/Issue
ELTS2 system is not switching back to normal from emergency
Description/Explanation of Issue
There are several reasons why a controller will not switch out of emergency:
- Phase voltage problems
- Fire alarm wiring issue
- Local control (key switch) wiring issue
- Remote station wiring issue
- Hardware failure
Wiring, remote stations, fire alarms, or phase voltages are the most common cause of a controller being stuck in Emergency.
A controller may also not appear to switch out of emergency due to delay settings. DIP switches on the controller determine the Normal-to-Emergency switching delay, along with the Emergency-to-Normal switching delay. Delay times range from 170 milliseconds to 60 seconds. Common switching delay for E->N is 30 seconds
For troubleshooting purposes, CR6 is the heartbeat LED of the PIC processor and will blink