Passive Infrared Alarm (490-0320) Troubleshooting . Faxback Doc. # 18581 If you have problems with the alarm, try these suggestions: Check the alarm's location and coverage. See "Choosing a Location" and "Testing the Covered Area." (Refer to Faxback Doc. # 18580). Check connections. See "Installation." Check for conditions that might cause false alarms. See "Choosing a Location" and "Avoiding False Alarms." (Faxback Doc. # 18578). Check for a blown fuse. See "Replacing the Fuse." (Faxback Doc. # 18579). If none of these hints help, take the alarm to your local Radio Shack store for assistance. (JC 11/02/95