Hello all I am conducting research on the Electrical Phenomena where alarm panels lock up and apear dead with no visual display. But ac power and dc are working to it. Have observed this several times now with panels were i power these panels down completly and repower and they come back up like nothing ever happened to them. Apears to be a problem in switching power supplies that has not been addressed by code making panels when certifying panels . Will be putting al this info together and sending to UL and manufactuers etc. for further investigation. to prevent this problem seems to happen mainly with thunder storms but not always have had happen on bright sunny days as well. it could be very disaterous where propertys are unattended and this condition is not known about till 24 hr test fails and a tech is sent to check it out. Thanks in advance for your help.
- posted
17 years ago