Hello
I have a 3 blower logic. Two modes. Mode is changes by pressing a button on a HMI screen, program is on ML 1400.
Mode ONE: One blower at a time. 3 blowers total. Each blower goes on and off for a set period of time. Next blower comes second hour, and third blower comes on third hour, fourth hour first blower comes back on again. If running blower fails(contactor), next blower picks up until first(or which ever turn) blower is fixed.
Mode TWO: Just like mode one except that two blowers run 2 at a time such as AB - BC- AC. If any of running blowers fail, third spare blower comes on.
The problem: In a situation where I am in a single blower mode, if a single running blower fails, instead of another single blower turning on, I have two blowers turning on. As soon as failed blowers(contactor) is fixed, everything goes back to a single blower mode. Somewhere I am crossing fail over logic between single mode and double mode but do not see where.
I hope my confusing description makes sense. I also have an oxygen sensor that dictates when blowers turn but please ignore that.
Any suggestions would be greatly appreciated!
I have a 3 blower logic. Two modes. Mode is changes by pressing a button on a HMI screen, program is on ML 1400.
Mode ONE: One blower at a time. 3 blowers total. Each blower goes on and off for a set period of time. Next blower comes second hour, and third blower comes on third hour, fourth hour first blower comes back on again. If running blower fails(contactor), next blower picks up until first(or which ever turn) blower is fixed.
Mode TWO: Just like mode one except that two blowers run 2 at a time such as AB - BC- AC. If any of running blowers fail, third spare blower comes on.
The problem: In a situation where I am in a single blower mode, if a single running blower fails, instead of another single blower turning on, I have two blowers turning on. As soon as failed blowers(contactor) is fixed, everything goes back to a single blower mode. Somewhere I am crossing fail over logic between single mode and double mode but do not see where.
I hope my confusing description makes sense. I also have an oxygen sensor that dictates when blowers turn but please ignore that.
Any suggestions would be greatly appreciated!