hkc 812 zone problem!? maybe not?

ei0675

Have an 812 someone ripped out old pcb as was faulty. Local installer I assist needed a hand on this job.
I've all zones traced ( cables were unmarked)
Zone 6 ( a contact) shows open all time.
I've shorted the zone and it closes so I know it's not the new pcb.
I tested the contact on zone cables (red and black) when open window lose continuity and close it I get it again. Test tamper have continuity, open it I lose it. So in theory works fine.
Put back into zone shows open even though window closed.
Done walk test not registering there either.

Ideas????
Cheers.

mickjohnlong

What ohms reading do you get on the cable at the panel with the contact connected?

ei0675

mickjohnlong wrote: »

What ohms reading do you get on the cable at the panel with the contact connected?

I'll check now in mo I'll reconnect contact to zone, what should I be getting??

mickjohnlong

Depends on the cable length should be low but

ei0675

Faulty contact I think other zones reading 3.5 it's reading 13.8

KoolKid

13.8 is not great, but the zone should close.
Is zone hardware set to non EOL?

mickjohnlong

KoolKid wrote:

13.8 is not great, but the zone should close. Is zone hardware set to non EOL?

That's what in thought

kub

Tamper cores conflicting with zone cores?

KoolKid

That would have been my next step.
Close off the tamper at the panel & wire in the alarm pair.

altor

ei0675 wrote: »

Have an 812 someone ripped out old pcb as was faulty. Local installer I assist needed a hand on this job.
I've all zones traced ( cables were unmarked)
Zone 6 ( a contact) shows open all time.
I've shorted the zone and it closes so I know it's not the new pcb.
I tested the contact on zone cables (red and black) when open window lose continuity and close it I get it again. Test tamper have continuity, open it I lose it. So in theory works fine.
Put back into zone shows open even though window closed.
Done walk test not registering there either.

Ideas????
Cheers.

It you close off the tamper plus the zone and it shows open I would assume you have either one of the tamper cables touching off the open/close loop or you have a crossed cable on this zone. Can you just use two cores and wire the device duel end of line?

ei0675

altor wrote: »

It you close off the tamper plus the zone and it shows open I would assume you have either one of the tamper cables touching off the open/close loop or you have a crossed cable on this zone. Can you just use two cores and wire the device duel end of line?

It's non eol, belled out alarm cores and tamper cores both were Ok but once in panel was showing open. Belled out red/blue and black/yellow and visa versa. No issue. Replaced contact.All sorted now.

Cheers for replies

altor

ei0675 wrote: »

It's non eol, belled out alarm cores and tamper cores both were Ok but once in panel was showing open. Belled out red/blue and black/yellow and visa versa. No issue. Replaced contact.All sorted now.

Cheers for replies

Contact was causing the crossover of the alarm and tamper loop.
This is why it was showing open.