Fire-Lite Addressable Panels - SLC Issue Discovery
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- Опубликовано: 21 авг 2024
- Myself and Cliff Mcilvaine discovered a significant issue that a bad resistor on a CMF module takes out entire SLC loop. Fire-Lite issued a tech bulletin and updated their firmware for the issue. Fire-Lite tech document: FLSB15-1-1 go1.honeywell.c...
![[TF2] The Russian Bear Trap](http://i.ytimg.com/vi/YFNSwz2_rOA/mqdefault.jpg)
I remember watching this video back in 2014 or 2015 and I was just brought back to this from something I saw pretty recently. There was apparently a technical bulletin released by Honeywell about a year later that suggested everyone to update the firmware of every panel because of this odd glitch.
Just to put this troubleshooting into prospective he first tried to solve it by replacing the SLC-2 card but, that didn't fix it, then he replaced the module and that didn't fix it. Note I would've done the same. Then meters the output wires and is reading 89k ohms which is double than it should be that's why it didn't go into trouble. RESISTORS NEXT TO NEVER GO BAD!! Swaps out a 50 cent 47k resistor and fixes the system. Frustration at it's finest!!
Despite this being an on the fly shaky video assessment, I appreciate the effort and the solution. Well done.
Before you ever pull a pullstaion always open it becomes a lot of times the locking mechanism can be frozen. Then you wont be able to reset it.
That’s Mando!
I love the term no blinky, it's professionally called polling tells you if the device is talking to the panel or not.
What SLC means?
Thanks for the video.
I would have first disconnected the SLC-2 and check the resistance - for shorts, opens, short to ground, and the resistance.
Then go to the module. Disconnect the circuit connected to its output and check for resistance as above.
Then continue from there according to the results of both measurements.
I try to avoid making assumptions and just measure/check & double-check!
I usually start with the wiring first, then input devices - passive & active; then output devices - AV; and finally, the panel itself unless there's some obvious reasons to depart from that methodology!
I have noticed that many don't document installations, modifications. Not even a sketch!
Very interesting video and steps for troubleshooting.
I thought all the addressable pull stations were keyed not hex locked. I also didn't know Fire Lite made an addressable single-action pull station.
When the system was originally installed, the original engineer for the project wanted "single action" pull stations. So, they are all Fire-Lite BG-12S conventional, single action, hex lock pull stations with MMF-301 mini-modules in the boxes behind them. Thanks for watching and putting up with the long rambling video!
Interesting! Also, I'm trying to figure out how the resistor on the control module causes the SLC to go offline without a fault message. I know the modules supervise their outputs by somehow measuring the amount of voltage "leaking" through the resistor to SLC ground, but since the control module also requires 24 volts of auxiliary power maybe it's using some other supervision method. Also, the rapid blinking seems to indicate that somehow the module is intercepting the "flash LED" commands being sent to the rest of the devices on the loop. Firmware update seems to have fixed the bug but man would I love to do electrical engineering for Fire Lite or Silent Knight!
nice search. great job finding the problem. not very easy to find.
How does a bad resistor take out the entire SLC Loop
Too much resistance, can short the whole loop.. common sense
Too much resistance should cause an SLC short trouble not no trouble at all.
That's the quality of fire lite for ya!
Firelite are good panels.. its the resistor got damaged causing malfunction of module bypassing the SLC later changing to invalid reply after he set the SLC back on, so blame the resistor lol
@Aslin Fire Safety well I guess it may be a dealer problem them.
Oh Oh is a allen key, WTF. Be prepared a screw driver that you can flip from flat to philips. Pull-stations key set, that would include an allen key. That would help. Don't forget the flashlight.
It's probably t-tapped
@Rocket Ronnie T-tapping is not recommended in addressable applications. This can cause polling issues on the LS protocol (I think). I've seen it cause issues in an FCI E3 system where some devices on the T-tapped portion would show as missing for a few seconds, then clear. This would happen intermittently every day. That whole portion of the SLC had to be re-run to the original end of the SLC line and the issue disappeared.
This building was actually Class A SLC wiring so no T-taps.
Is it the cmf-300?
No. It was the 47K EOL connected to the CMF. The resistor had gone bad and its resistance value crept up to like 95K or so. When that happened, the entire SLC shut down with NO trouble on the FACP. So, the panel was sitting "NORMAL" but totally inoperable. After about 6 months, Fire-Lite issued a "suggested" firmware update: bit.ly/2WKcShc. I remember at the time that I thought it should have been more than suggested. Of course, nowadays, we're well beyond using those panels.
@@jaddwooka now I've been looking at ps tools and I've been trying to figure out how to update my ms-9600udls.. care to guide me?
Great job on troubleshooting , made in China resistors.