Fan stopping when pump starts

My Attack has an RK2001AT2 controller, this controller has a temp sensor just above the HX tubes. When the exhaust temp reaches a certain point the controller is in "work mode".

I assume that once this temp is too low (below setpoint) the fan shuts off and "FUEL" is displayed, well now during a cold start once pump launch temp is reached the circulator contacts close and the fan stops, no matter what the stack temp is???????

During boiler burn-out same thing, once the fan stops on it's own and the water temp drops and the circulator turns off, the fan will come back on??????????

Any insight would be greatly appreciated. This has only started to happen, I just wonder if it's a certain set of events (temps) that makes this happen. I've been playing with some of the settings but it still happens from time to time.

THANKS!

TS

It's definatly a software issue (setting in there somewhere). Mine has the higher voltage cap from the factory, no flickering or otherwise erratic behavior. I think it may be that the stack temp is not high enough when the circulator comes on. I set the stack temp for 230F so I can have some charcoal to start the next fire. It only does this from a cold start.

There is some sequence of events that triggers it, I just need to figure out what and adjust some parameters accordingly.

TS

Just wanted to do a follow up.

PROBLEM SOLVED

This only happens when the unit goes into FUEL mode during shut down (all normal). Well if I press the Stop button to acknowledge the FUEL so now I can see the boiler temp displayed. Well.....during the next cold start when I turn the controller back on this happens.

It does not do any abnormal fan shutdowns if I leave the controller alone once it is in FUEL mode, and do not acknowledge until the next fire is lit (the next day).

Hope this helps someone out there!

TS