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Hi guys
My question is
Is any specific voltage signal that is generated in the outdoor unite when the unit is changing from cool-mode to heat-mode
For instance any voltage signal 12/24/230V. From the electronic card.
I what to control a external fan with a external reley so the reley coil is energized constantly wile the unit is on heat mode.
I don’t whant to use the voltage from the four valve because is to constantly 230V (defrost)
Any ideas, thanxs.
The comms signal will be some sort of pulse signal so unfortunately it's not suitable.
You could check if there is an interface board like the KRP style that is suitable, I don't think it is but I'm not that familiar with them, just know they exist and have wired them up for fire alarms and BMS control.
Alternatively can you use the 4 way valve output but use a timer relay on an overrun for say 15 minutes as I doubt the defrost is longer than that and unless the valve de-energises when setpoint it reached it should get pretty close to what you need?
Cheers,
Andy.