Douglas Krantz - Technical Writer - Describing How It Works
Get the book Make It Work - Conventional Fire Alarms

How Can We Fix Intermittent Beeping Troubles?

I have a question about something


Mr. Krantz

We have a fire alarm system installed ~ 2000, it started beeping trouble, runs through all the points as troubles, then restores to normal. Fire alarm technicians cannot figure it out.

It started doing this after a very cold weekend (temps less than 10), and the trouble monitor seems to be getting more frequent, now ~ every 15 minutes. It has been of course driving the people in the building it is located crazy.

Thank you.

S

You need to know whether the panel is having problems or something in the rest of the building is having problems. Start by dividing the panel from the building fire alarm system.

Disconnect all wires from the panel; see if the panel becomes stable. If, with all wires disconnected, the problems persist, the panel may have problems and needs repair or replacement. If the problem stops, start connecting the wires, one pair at a time. Find what wires cause the problem and continue to troubleshoot from there. When doing this, take pictures before doing anything, and carefully mark all wires so they can be landed on the same terminal they came from originally.

Watch out for "false fixes". These are "fixes" where the panel quits having problems when the technician is in site, but sometime after the technician leaves, the troubles come back. It could be a thermal problem inside the panel that only shows up after the door has been closed for a while. The problem is that when the door is opened to service the panel, the panel cools down just a few degrees. That few degrees cooler is enough to make the panel stable. When the door to the panel is closed because the technician is leaving, it takes a little while to heat up a few degrees in the panel, and then the troubles come back.

I've seen this kind of trouble only once every 5 years or so, but this actually does happen. Usually the panel needs replacement.

Just use standard troubleshooting procedures; assume the problem is somewhere, and do what it takes to find it and then fix it.

Douglas Krantz
Based on his electronics training, and his understanding of Life Safety, Douglas Krantz has compiled his knowledge of Conventional Fire Alarm Systems into the book Make It Work - Conventional Fire Alarms. The book covers the basics of the Conventional Fire Alarm System, and shows how Life Safety and internal supervision affects the fire alarm system.

Douglas Krantz -- Fire Alarm Engineering Technician, Electronic Designer, Electronic Technician, Writer

Share This With Friends:

Go to the Fire Alarm Description Map Page of Douglas Krantzs Technicians Corner
Go to the Residential Life Safety Map Page of Douglas Krantzs Technicians Corner
Go to the Residential Life Safety Map Page of Douglas Krantzs Technicians Corner
Go to the Fire Alarm Description Map Page of Douglas Krantzs Technicians Corner
Go to the General Electrical Map Page of Douglas Krantzs Technicians Corner
Go to the Fire Alarm Maintaining Map Page of Douglas Krantzs Technicians Corner
Go to the Fire Suppression Map Page of Douglas Krantzs Technicians Corner
Go to the Guest Writer's Guidelines of Douglas Krantzs Technicians Corner
See Trivia on Douglas Krantzs Technicians Corner
This website uses cookies. See Privacy for details.
Get the book Make It Work - Conventional Fire AlarmsGet the book Make It Work - Conventional Fire AlarmsGet the book Make It Work - Conventional Fire AlarmsGet the book Make It Work - Conventional Fire AlarmsGet the book Make It Work - Conventional Fire Alarms
Reader's Favorite Articles

What is a Stair Pressurization Fan (SPF)?

Which Way Does Electricity Flow?

What's the Difference Between Class A and Class B?

What Makes the End of Line Resistor So Important?

What is a Flyback Diode?

What is a Fire Alarm System?

What is an RTU (Roof Top Unit)?

What Causes an Open NAC?

Learn about fire alarms, one article at a time -

Keep up on the latest article!




No Charge - Unsubscribe Anytime