Zone Tamper 01-04 - Problem With Scantronic 9651

[martin691]

Hi,

I have a Scantronic 9651 hardwired control unit and a 9943 keypad.

I have the following zones

Zone 1: Fire (FR)

Zone 2: Normal Alarm (NA)

Zone 3: Normal Alarm (NA)

Zone 4: Normal Alarm (NA)

Zone 5-8: Not Used (NU)

I am usings CC + Com A/T as a zone configuration.

When I go into installer mode, and then press 99 and tick, the display shows as expected:

99:Checking bus

99 Exit Eng?

I then press the tick, and it shows:

99:Checking Sys

Shortly after this it flicks through the following messages:

Tamper Zone 01

Tamper Zone 02

Tamper Zone 03

Tamper Zone 04

I checked the resistance between the 2 COM A/T connectors, and it was about 1kOhm.

I thought maybe this value is too high, so I connected a wire direct between the 2 connectors, so that it gave a zero resistance value, but when I then did the whole procedure above and it ran through the checks, it said the same thing.

Surely by shorting between the 2 COM A/T connectors it shouldn't register a tamper?

In the attached photo, you can see that there is a blue and white wire going into the COM A/T connectors, and then I put a black wire accross the 2 to test the Anti Tamper problem.

Thanks in advance for any help.

Martin

[miaren]

It may be the way the panel has its zones programmed. Check the manual for the correct zone setup.

[martin691]

I gave details about how I configured the zones, but just to give more info:

Zone 1: Fire (FR) abcd

Zone 2: Normal Alarm (NA) ab

Zone 3: Normal Alarm (NA) ab

Zone 4: Normal Alarm (NA) a

Zone 5-8: Not Used (NU)

I don't know if this answered it, and if not, I don't know what you mean.

Thanks

Martin

[martin691]

I also changed all zones to NU (Not Used), which stopped the message.

I then set zone 1 back to FR and it came back with the message:

Tamper Zone 01

I then change Zone 4 to NA (Normal Alarm), and made all others, and it came back with:

Tamper Zone 04

I would guess no matter which zones are NU, the tamper circuit will remain the same regardless.

Thanks.

[reidy]

I think miaran was refering to zone wiring as in is the panel setup as FSL or CC

[martin691]

When I press 21 and a tick in installer mode, I get the following:

21: CC+ComA/T

I wired it as CC, so have not used resistors, and the tamper loop has very little load over it, so in my opinion should not be showing tampered.

Thanks.

[Oxford]

Take the tamper pair out and put a hard link across the a/t on the board and see what happens. Then proceed to meter out each tamper circuit individually. I take it the tampers are in series and not parallel?

[miaren]

Worth putting the 2k2 resistors directly across 1 or 2 zones. Then exit programming. If the panel still thinks its FSL, those zones should dissapear.

[martin691]

Take the tamper pair out and put a hard link across the a/t on the board and see what happens. Then proceed to meter out each tamper circuit individually. I take it the tampers are in series and not parallel?

Unless I misunderstand this, I put a black wire going accross the a/t as you can see in the photo. The tampers are in series. The current resistance accross the tamper contacts is zero. With and without the direct wire, the result is the same.

Worth putting the 2k2 resistors directly across 1 or 2 zones. Then exit programming. If the panel still thinks its FSL, those zones should dissapear.

Do you mean putting the 2k2 resistors instead of the yellow and green wires that you can see in the photo? Therefore I will not be touching the tamper loop.

I will try that now.

I don't think the panel thinks its FSL, because pressing 21 and a tick comes back with CC+ComA/T. I changed it to FSL which had the same Tamper messages, and then changed it back again, and still had Tamper messages.

[miaren]

Do you mean putting the 2k2 resistors instead of the yellow and green wires that you can see in the photo? Therefore I will not be touching the tamper loop.

Exactly. with the 2k2 in, the zone will be seen as normal if the panel is in FSL mode.

Have you tried defaulting the panel?