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I took out the controller assembly yesterday.
The whole thing doesn't look like original part. I think someone designed both of their own boards, or it was low volume retrofit because the controller was not available any more.
The components look OK, relays look clean, and in the next day or two I will check the general functionality of the unit (hopefully I will be able to do so in absence of some peripherals).
The fact is, compressor works for heating, but it doesn't start for cooling.
However... I started to think that I don't really need such sophisticated controller at all (heating, cooling thermostat, timer... ).
I need this thing to cool only, because I already have gas heater in the room...
If it's a hot day, I will switch the cooling ON.
When it becomes cool or too cold, I will switch it OFF. And I will turn on gas heater in winter.
So I think I will just rewire the whole thing at the end, if it's too time consuming to figure out and repair the controller...
Of course, all depends on the valve condition...
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