Troubleshooting
![](/sitemaps/103/small/103.jpg)
Back
Assembly PK 12
Error category
Error signalling
Problem
LED OUT 1 flashes with 2 Hz
Error signalling
Problem
LED OUT 1 flashes with 2 Hz
Possible cause
Supply voltage incorrectly connected
Solution
Check correct connection of the pyrometer to the plant
![Check correct connection of the pyrometer to the plant](/api/keller/getMedia?bu=its&id=ID9000021)
Supply voltage incorrectly connected
Solution
Check correct connection of the pyrometer to the plant