vykingman
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Posts posted by vykingman
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16 hours ago, PeterJames said:
There are several things that could be causing your problem as follows:
1. Auxiliary power failing. Loose fuse or poor connection at the panel down powering the vipers will cause the circuit to go open giving the impression that they had activated. This is why its important to know If the pir were to activate along with the vipers when the system is fully set as this would indicate that it is a power problem.
2. The cables to the vipers may have a fault on them, the fact that you have nt had a tamper fault would suggest that the 24hr loop is okay, if you swap the pair both ends and you start to get tamper faults then you know its the cable. Although it could also be an intermittent short between the tamper and alarm circuit. So if the false alarms continue it still maybe a short between alarm and tamper, To prove this I would remove the wires from the tamper circuit and fit a link, if the fa's stop its a short problem.
3. The panel itself. It could be just the zone or it could be dropping power
4. The vipers. As there is two of them it is very unlikely, but not impossible.
My money is on 1 or 2 the detectors seem to work as they should when tested and the panel operates correctly, but an intermittant fault can be difficult to find especially without a multimeter.
Top man Peter James - I started to work through your suggestions and as I did so I also did a visual inspection of the connections in the control panel. As I touched the zone 7 (false alarming) the yellow cable which is the alarm cable fell out of the connector. I noticed more than 50% of the multi core wire had broken away. I double checked the rest - all were OK. I'm going to soak test over the next few days.
I had only checked the internal battery which was fine.
I appreciate that this may not be the problem but its a good starting point.
I have one more question. Is it possible to programme the FA zone out of the system? Or do I need to disconnect the zone in the CP. I am going away for month of February and If the problem persists I would like to set at least part of the alarm.
I must thank you once again for your time and input on this it is very much appreciated. Whilst I'm happy around handling electronics and looking at the physical side of things, the old brain slows down a bit after time.
Back in the late 60's I worked on fighter aircraft radio systems and their wiring.
Lets hope the problem is fixed.
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2 minutes ago, PeterJames said:
That narrows it down a bit use the 24hr tamper wires as the circuit and link out the tamper circuit at the panel. If it stops you either have an intermittent short between tamper and alarm or an intermittent open circuit .
Thank you I understand what you are saying. I'll check it first thing tomorrow.
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2 hours ago, MrHappy said:
Normally a competent alarm engineer would measure the circuits,
low Ohms between each pair of cables, high Ohms between cables which ain't paired.
With the system running on battery power only, measure the voltage at each device to ensure it high enough.
Full set the system & check the device operates as intended,
If all fine I would swap the circuits with another zone & place the viper circuit on soak test.
You can do all this yourself or just find a competent alarm co. to look after your system.....
Thank you for your input on this problem. I can check your suggestions and see what I come up with.
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1 hour ago, PeterJames said:
There are several things that could be causing your problem as follows:
1. Auxiliary power failing. Loose fuse or poor connection at the panel down powering the vipers will cause the circuit to go open giving the impression that they had activated. This is why its important to know If the pir were to activate along with the vipers when the system is fully set as this would indicate that it is a power problem.
2. The cables to the vipers may have a fault on them, the fact that you have nt had a tamper fault would suggest that the 24hr loop is okay, if you swap the pair both ends and you start to get tamper faults then you know its the cable. Although it could also be an intermittent short between the tamper and alarm circuit. So if the false alarms continue it still maybe a short between alarm and tamper, To prove this I would remove the wires from the tamper circuit and fit a link, if the fa's stop its a short problem.
3. The panel itself. It could be just the zone or it could be dropping power
4. The vipers. As there is two of them it is very unlikely, but not impossible.
My money is on 1 or 2 the detectors seem to work as they should when tested and the panel operates correctly, but an intermittant fault can be difficult to find especially without a multimeter.
Many thanks for your input on this. I will work through your suggestions and see what I come up with. Not to sure how to test your first suggestion as the viper zone is the only one that is indicated on the control panel.
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The vipers are
3 hours ago, al-yeti said:So full set no problem?
And vipers are not active on full set?
The system does FA on full set - its the same viper zone that is activated - but no viper LED flashing?
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Its a Scantronic 9800 Plus. Mains/battery
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This is a guess but bare with me. If the viper has wires in both 24hr and alarm terminals would that make it double poled?
infact all terminals have been used.
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Sorry - FSL or DP
it sure what they are
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The pir is a separate circuit. The false alarm happens when it's on part set perimeter only. It's always the same viper zone that shows is activated.
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The two vipers form part of a perimeter protection for use at night.
the room also has pir detection as backup when house is vacant.
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On the walk test when the viper is knocked the lights do come on. They are reset when the alarm is reset.
Thanks for the info on Blitz.
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I am the system owner.
The company I was with has been taken over by another. Not happy with new company so have cancelled service contract.
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Many thanks for your prompt reply.
This is has been a fully serviced system since it was fitted. The standby battery was replaced last October on its annual service.
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Can anyone help with a bit of fault diagnosis on a viper (x2) circuit
This is an older Scantronic system where I am getting false alarms on a circuit with two vipers - about eight(8) years old.
Strangely neither viper LED flashes after false alarm. When walk tested both vipers flash as they should.
I have checked the internal viper wiring and all good.
Question is this a viper problem or wiring.
Any help would be good - thank you.
Info on Viper circuit false alarm.
in Detector Queries (Public)
Posted
UPDATE: the alarm has now been tested fully for over two weeks - four days at full set - and all is well. Once again a big thank you to all who helped me. It was very much appreciated.