David Andrews Posted March 1, 2017 Share Posted March 1, 2017 Hope someone can help. My elderly mother had a scantronic alarm and it kept going off randomly. I changed the control panal for a like for like (9651PD) and wired everything up as before taking care with the wiring. Once I now exit out the installer menu i get the error ' COM A/T' Can anyone offer any advice on what this is or how to clear it? thanks Quote Link to comment Share on other sites More sharing options...
james.wilson Posted March 1, 2017 Share Posted March 1, 2017 can you post a picture of the main board so we can see the wiring? Quote securitywarehouse Security Supplies from Security Warehouse Trade Members please contact us for your TSI vetted trade discount. Link to comment Share on other sites More sharing options...
datadiffusion Posted March 1, 2017 Share Posted March 1, 2017 2 hours ago, David Andrews said: Hope someone can help. My elderly mother had a scantronic alarm and it kept going off randomly. I changed the control panal for a like for like (9651PD) and wired everything up as before taking care with the wiring. Once I now exit out the installer menu i get the error ' COM A/T' Can anyone offer any advice on what this is or how to clear it? thanks You need to look at Option 21. I assume you have a global tamper - or have you rewired for EOL? If you've re-wired for EOL at each detector (highly recommended), you need to set option 21 to 'FSL', NOT 'COM CC' If you have kept one, single large tamper loop (this was your opportunity to do away with it!) then you have a fault within that loop. You will need to separate each pair of wires and check with a meter individually. Quote So, I've decided to take my work back underground.... to stop it falling into the wrong hands Link to comment Share on other sites More sharing options...
David Andrews Posted March 1, 2017 Author Share Posted March 1, 2017 This is of the old unit, i havent a picture to hand of the new one. Il try and take one tomorrow. Thanks in advance. Quote Link to comment Share on other sites More sharing options...
al-yeti Posted March 1, 2017 Share Posted March 1, 2017 3 hours ago, David Andrews said: Hope someone can help. My elderly mother had a scantronic alarm and it kept going off randomly. I changed the control panal for a like for like (9651PD) and wired everything up as before taking care with the wiring. Once I now exit out the installer menu i get the error ' COM A/T' Can anyone offer any advice on what this is or how to clear it? thanks What was original fault? Meaning what was it reporting when going off? May just have been the battery Quote Link to comment Share on other sites More sharing options...
datadiffusion Posted March 1, 2017 Share Posted March 1, 2017 Right... I think we all expected to see a pic of an ancient 9100 or something. When you say, 'going off randomly', so you mean, without anything being displayed on the screen, or are we talking false alarms here? If so, changing the panel won't help, and in a slightly more definitive answer to your original question, for reasons unknown the original installation uses a common tamper, i.e. one massive tamper loop for all the detectors. Right now, you have a tamper on any one of the devices or wiring fault causing the global (CC) tamper. It really should have used EOL type wiring, so any faults on each zone are shown as being only on that zone. It requires 2 resistors at each detector (modern devices have them built in a lot of the time) and saves a lot of headaches, as well as only needing 2 wires for each zone. So, can you let us know exactly what the previous problem was? Quote So, I've decided to take my work back underground.... to stop it falling into the wrong hands Link to comment Share on other sites More sharing options...
David Andrews Posted March 1, 2017 Author Share Posted March 1, 2017 This is of the old unit, i havent a picture to hand of the new one. Il try and take one tomorrow. Thanks in advance. Quote Link to comment Share on other sites More sharing options...
David Andrews Posted March 1, 2017 Author Share Posted March 1, 2017 pic above is of one of the PIR's When you walked into the hall from coming in it would go off instead of having a delay. Also when she was out it would go off and say the PIR in lounge had been triggered. Also on other occasions it wouldnt let her turn it off when she came in. The keypad was changed a while ago by local alarm company but problems still keep happening that's why I changed the control panel. thanks Quote Link to comment Share on other sites More sharing options...
james.wilson Posted March 1, 2017 Share Posted March 1, 2017 well it looks like you have a tamper fault you will need to track down and a sensor or cable issue in the lounge Quote securitywarehouse Security Supplies from Security Warehouse Trade Members please contact us for your TSI vetted trade discount. Link to comment Share on other sites More sharing options...
datadiffusion Posted March 1, 2017 Share Posted March 1, 2017 (edited) 18 minutes ago, David Andrews said: pic above is of one of the PIR's When you walked into the hall from coming in it would go off instead of having a delay. Also when she was out it would go off and say the PIR in lounge had been triggered. Also on other occasions it wouldnt let her turn it off when she came in. The keypad was changed a while ago by local alarm company but problems still keep happening that's why I changed the control panel. thanks When you say 'walked into the hall', is there a magnetic sensor on the front door AND a PIR in the hallway? If so perhaps the magnetic sensor is stuck 'shut' so unable to put the hall sensor into access mode...? The PIR you've pictured looks ancient, I would change them all, and also consider location. Was the old keypad an oblong one with fairly large keys? They are notorious for the keypads key presses going hard to register, and people needing to put massive pressure on the keys. Did they replace it with the same, or a square one as came with your new PD kit? Either way, you now have a tamper wiring fault - somwhere. I would take this opportunity to change the PIRs and convert wiring to EOL. Edited March 1, 2017 by datadiffusion Quote So, I've decided to take my work back underground.... to stop it falling into the wrong hands Link to comment Share on other sites More sharing options...
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