What to do if Honeywell Farenhyt Control Panel SLC devices are not being recognized and displays 'Missing' on the annunciator?
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Joseph HodgesAug 22, 2025
Check that the SLC loop impedance is within the required range. To measure impedance, use the following procedure. Disconnect both wires from the terminal block at the panel (SLC devices can remain connected). Measure the impedance from positive to negative and from negative to positive. Both measurements should be greater than 500 K ohms. If the installation uses T-taps, test each T-tap individually. Temporarily connect the positive wire to the negative wire of the SLC loop at the point farthest from the panel (SLC devices can remain connected). Measure the impedance from positive to negative and from negative to positive. Both measurements must be less than 40 ohms.
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Katherine CoxAug 25, 2025
Why does the Honeywell Farenhyt display a “DBL ADDR” (Double Address) trouble message?
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idillonAug 25, 2025
The “DBL ADDR” message on the Honeywell Control Panel indicates that an address has been assigned to more than one detector. Correct the address following the procedure described in Section 7.7 for SK & IDP devices or Section 7.9 for SD devices.
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qscottAug 27, 2025
How to correct incorrect polarity on Honeywell Farenhyt Control Panel auxiliary power or notification circuits?
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Elizabeth McmillanAug 27, 2025
To correct polarity on notification and auxiliary power circuits: When in alarm or powered, terminals labeled “X” are positive, terminals labeled “O” are negative.
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Lisa GonzalezAug 30, 2025
Why does my Honeywell Control System panel indicate a ground fault trouble?
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Robert HuntAug 30, 2025
The panel may show a ground fault if it detects an unexpected current flow from its terminals to the earth connection. You can isolate the fault by removing wiring connections one at a time, pausing at least five seconds between each removal, until the fault clears. Also, a computer connected via a serial or USB cable can cause this; the message can be ignored and will clear upon disconnection.
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Alexander CarterSep 2, 2025
What to do if SLC devices are not being recognized on my Honeywell Control Systems (trouble message “Missing” displays)?
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john18Sep 2, 2025
First, check the hardware connections and wiring to ensure they are correct. For the main panel, the positive side of the device must connect to terminal 34, and the negative side to terminal 33. Also, ensure the SLC devices connect to the SLC loop via the SLC OUT terminals. Next, verify that the SLC devices have been addressed properly. For contact monitor modules using DIP switches, the DIP switch must be set to the correct address before applying power to the SLC loop. Finally, confirm that the correct polarity has been observed for the SLC device wiring.
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Mr. James ThomasSep 5, 2025
What to do if my Honeywell Control Systems 5496 module is not being recognized?
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tommyfrederickSep 5, 2025
If the module's LED flashes in a 5-second on/5-second off pattern, it likely hasn't been added to the system through programming. Also, ensure the correct ID for the 5496 module has been set using the DIP switches; assign ID#1 to the first 5496 and ID#2 to the second. If the green LED isn't flashing, check the wiring between the 5496 and the panel and measure the voltage from the 5496 Terminal (+) to Terminal (-); it should be between 27.2-27.4V when AC power is present.
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