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Welcome. My name is ***** ***** would be glad to assist.
Can you first, check the wires and find the 3 wires that go to each of the micro switches?
Should be one common, one NO and one NC to each of the switches.
Also, verify the actual motor for the fan is 120 volts, as with 3 phase supply, the motor is most likely 3 phase to be large enough for air changeover.
Let me know and we can continue,
Ok, very good.
There should be 2 micro switches with 3 wires each.
One switch would control the alarm strobe and siren, the other the fan shutdown.
If the fan is 3 phase, you would need a contactor or a shunt trip breaker for it.
The strobe and siren are the easiest, as they can wire directly to the micro switch
Will await your post
First we need to test and find out which wire on each one is COM, NO and NC
Then a diagram can be made for the situation.
If you had continuity between blue and brown, then brown is closed not open.
Need to know which it is please.
If I assume the brown is normally closed and yellow normally open, it will wire as seen below
Not sure why they state one thing and it is different?
That is probably the case, so you would swap the yellow connection to the brown.
if you could power to check, you could be certain.