I have installed a Honeywell dt7550 today and I have a slight problem where after a few minutes of it being powered up the Red led flashes rapidly I have read in the manual this means microwave supervision failure however the detector still works fine on walk test? So I was wondering if I could have any help in making it work properly please? Below is how I have wired it and a view of the pcb

Edited September 7, 201510 yr by Help please

Red fast flash is i believe Anti-mask condition, basically the microwave has detected movement when the PIR section hasnt.  Usually happens when you have the microwave range is set too far and it ends up seeing into the next room or something(which the pir cant do)

Ok thanks it's in my parents house so I will be back there on Thursday the alarm still sets and it chimes on walk test like it's meant to only with the red led flashing, how would I be able to stop it flashing I have turned the microwave wheel all the way down and it still flashes?

which way is up?

do your cables enter from the bottom or top?

Top I reckon.....

Or maybe rhs?

which way is up?

do your cables enter from the bottom or top?

Sorry about that the cables enter at the bottom

Red fast flash is i believe Anti-mask condition, basically the microwave has detected movement when the PIR section hasnt. Usually happens when you have the microwave range is set too far and it ends up seeing into the next room or something(which the pir cant do)

What?????

That's anti mask?????

You mean red flashing fast could be the sensor is showing masking , which isn't what you described

Fast flash is trouble problem with masking or fault with the Pir and so on

Did you just buy this ? You may have damaged it or its faulty

Edited September 7, 201510 yr by al-yeti

I was given two of them about a year ago I used one in my house and have only just installed this one in my parents house, they are second hand but working when they were removed I dont see any reason why it shouldn't work now it's only been in a box in my garage for a year, what's strange is it seems to work just fine on a walk test

Sounds like detector fault indication to me.

Update..... I have replaced the pir for an old unused pyronix magnum I had in my garage and it's working fine now, thanks for all your help I really appreciated it