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Concept · Zone E · Alarm panel

Alarm, supervisory or trouble: reading the three panel signals

A supervisory signal means part of a fire protection system is not in its normal state, such as a closed sprinkler valve or a low water tank. An alarm signal means a device has detected fire. A trouble signal means a fault in the alarm system itself, such as lost AC power. Everything else on the panel, from the lamp test to backup power, is on the fire alarm control panel page.

Plan ref E1Updated October 25, 2026

Where the three signals get mixed up

Sources from the Study Material, and the pairs that are easy to confuse

SignalTypical sourcesEasy to confuse withHow to tell
AlarmA pulled station, a smoke or heat detector, or water flowing in a sprinkler pipe.Supervisory, whenever sprinkler water comes up.Does something show fire? Flowing water does: a sprinkler head has opened.
SupervisoryA sprinkler control valve shut instead of open, tank or valve pressure, gravity tank level or temperature, a fire pump problem.Trouble: both mean something is wrong, and neither means fire.Is the problem in a part of the fire protection system the panel watches? Then it is supervisory.
TroubleLow battery, AC power failure, phone line failure, a failed part inside the panel.Supervisory, when power or a pump is involved.Is the alarm system itself at fault? A fire pump fault is supervisory; the panel losing AC power is trouble.

Ask what sent the signal

The Study Material uses all three words, and the everyday word “alarm” blurs them. One question sorts them: what sent the signal?

The Study Material lists the usual supervised conditions (Source: Study Material §10.8). Tamper switches show a sprinkler control valve closed instead of open. Pressure switches watch pressure tanks and dry pipe valves. Gravity tanks are watched for high or low water and high or low temperature. Electric fire pumps are watched for pump running, pump failure and phase reversal.

Water is where two of them meet

Water moving through a sprinkler pipe is an alarm: a sprinkler head has opened, so there may be a fire. A valve that should be open but is shut is supervisory. Nothing is burning yet, but the sprinklers could not get water if a fire started.

Some panels show the exact device. Others show only a general supervisory signal. Then each supervised device has to be checked to find the cause.

The panel buttons do not treat the three alike. What ACK, silence and reset each do is on the acknowledge, silence and reset page.

All three signals reach the central station company (Source: Study Material §10.8). The central station page follows them from there.

Narrowing it down

The water level in a gravity tank drops below normal, and its switch reports to the panel. Which signal should the panel show?

Which ones drop out

  • No signal, because tanks are not monitored The Study Material names gravity tanks among the supervised conditions. A monitored tank does report.
  • An alarm signal Nothing here senses smoke, heat or flowing water. A low tank is not a sign of fire.
  • A trouble signal Trouble is a fault in the alarm system’s own circuits or parts. The tank belongs to the fire protection system, and it is in an abnormal state.

Supervisory. A watched part of the fire protection system is out of its normal range (Source: Study Material §10.8).

Checkpoints: the panel is talking

Checkpoint round

0 of 6 checked · 0 cleared

Practice questions written for study, not taken from the test. The real F-80 is a multiple-choice test on a touch-screen computer at FDNY Headquarters.

Each checkpoint lists moves that fit different signals. Read them first and strike the ones made for another signal. Let the stem settle the last two.

How the checkpoint round works

Read the options first and rule out the ones that break a rule, then pick from what is left. After you answer, the debrief explains every option and scores your strikes. Keys: 1–5 or A–E answer, Shift with a number rules that option out, the arrow keys move.

Checkpoint 1 of 6

  1. Checkpoint 01

    The panel shows three signals at once: ALARM from a smoke detector, SUPERVISORY from a sprinkler valve, TROUBLE for low battery. What should the coordinator do first?

    Rule out what you can with the ✕ buttons, then choose. The debrief for every option opens here.

    1. AAcknowledging silences the chime but does nothing about the alarm; a low-battery trouble is a fault to fix after the fire signal is checked.
    2. BCorrect: An alarm signal means a device sensed possible fire, so it outranks supervisory and trouble signals; check that zone first and treat it as real.
    3. CA closed or off-normal valve needs fixing soon, but a supervisory signal is not a fire signal and waits behind the alarm.
    4. DThis flips the order. A trouble is a circuit or component fault, and letting it delay the alarm check is the trap here.
  2. Checkpoint 02

    The fire alarm control panel indicates a SUPERVISORY signal corresponding to a sprinkler control valve tamper switch. How should the coordinator immediately respond to this specific non-emergency signal?

    Rule out what you can with the ✕ buttons, then choose. The debrief for every option opens here.

    1. ADeferring is the problem. A supervisory condition such as a closed valve must be found and resolved right away, not parked until a routine visit.
    2. BResetting before the valve is restored only clears the light; the sprinkler control valve may still be closed.
    3. CA tamper signal means a valve is off-normal, not that there is a fire; evacuation is not the response, and the central station already gets the signal.
    4. DCorrect: Report it, record it, and leave the panel alone until the valve is checked and restored; a reset first would hide an open problem.
  3. Checkpoint 03

    A TROUBLE signal activates due to a detector wiring fault. In addition to silencing the local panel chime, what is the most appropriate action for the coordinator to take?

    Rule out what you can with the ✕ buttons, then choose. The debrief for every option opens here.

    1. AA fire watch belongs to an out-of-service system; ordering one before you know the fault’s extent skips the assessment step.
    2. BA trouble signal reports a wiring or component fault, not a fire, so there is nothing to dispatch responders for.
    3. CA reset does not clear trouble conditions; most clear on their own once the fault is fixed, so resetting only delays the repair call.
    4. DCorrect: Trouble must be investigated and corrected, so silence the chime, call the service company, and check whether the fault puts part of the system out of service.
  4. Checkpoint 04

    During a weekend night shift, a supervisory signal activates. The alarm vendor cannot arrive until Monday. What is the appropriate off-hours response for the coordinator?

    Rule out what you can with the ✕ buttons, then choose. The debrief for every option opens here.

    1. AA single supervisory signal is not a system-wide failure or a fire; a full evacuation overreacts to one off-normal device.
    2. BAvoiding notifications is the giveaway. An open supervisory condition has to be reported and recorded, not left in a shift note.
    3. CCorrect: The vendor delay does not pause your duties; report to management, keep the log current, and add protective steps until the device is fixed.
    4. DSupervisory signals call for prompt investigation and correction, so waiting for business hours leaves a monitored part of the system compromised.
  5. Checkpoint 05

    A log book entry reads: “09:00 - Duct smoke detector supervisory active. 09:10 - Investigated, no smoke. 09:15 - Logged event.” What step is missing?

    Rule out what you can with the ✕ buttons, then choose. The debrief for every option opens here.

    1. ATesting notification appliances is technician work and does nothing for the duct detector that is still showing supervisory.
    2. BA supervisory signal is not a fire alarm; staff investigated and found no smoke, so evacuation is not the missing step.
    3. CCorrect: Investigating and logging were done, but nobody arranged the repair; the central station and the service company must be told so it gets fixed.
    4. DA reset may clear the light, but the cause is still unrepaired; resetting is not a substitute for a service call.
  6. Checkpoint 06

    The panel shows a trouble signal. How should the response differ if the fault is in a main detection circuit rather than a display unit?

    Rule out what you can with the ✕ buttons, then choose. The debrief for every option opens here.

    1. ACorrect: A detection circuit fault can leave areas unwatched, so assess it as a possible out-of-service condition; a display fault still gets logged and repaired.
    2. BThe routing is backward and invented. Every signal, trouble included, goes to the central station, and FDNY is notified when a system is out of service.
    3. CTwo absolutes sink it: a fire watch follows an impairment assessment, and every trouble condition, however small, gets recorded.
    4. DA trouble signal is a fault, not a fire; neither type calls for an evacuation by itself.

Where the rule is written

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