Heat and cooling on at same time

[mario]

Guys and gals;
My BMPlus3000 which has been operating without any issus for few years, all of the sudden started calling for heat and cooling at same time.
This only happens when I call for heat. Y1 and W1 come on at same time, see attached image.
Calling for cooling works just fine.

Any ideas or fixes?

Thanks,
Mario

[Erik W.]

Mario,

Is this a heat pump or is this a heat pump or straight air conditioning with a gas furnace?

Erik Wnoroski
EWC Controls, Inc.
385 State Route 33
Englishtown, NJ 07726
800-446-3110 ext 483

[mario]

The board is configured for single unit combo heat & A/C unit with zone dampers.
In reality the actual system is 2 stage heat, where radiant heat is first stage. Only when there is a 5deg F. delta, will the second stage kicks on, but that's handled thru RC2000 T-Stats. To my recollection, controller board doesn't know anything about first stage and it only called into service when second stage on the T-Stat kicks in and of cause during cooling mode.

[Erik W.]

Mario,

An issue like the one you are seeing is better off being troubleshot over the phone rather than the forum. If you could please give me a call at the number below I will gladly help you rectify your issue. Please have a voltage meter and a pocket screwdriver handy.

Erik Wnoroski
EWC Controls, Inc.
385 State Route 33
Englishtown, NJ 07726
800-446-3110 ext 483