NMEA2000 Engine Alarm Puzzle

willk · 02 August 2016, 16:23

I have a bit of a puzzle for those engine electronics experts out there - I can't get my head around it:

I have a Yanmar 8LV with some sort of CANBUS link to my NMEA2000 network. It also has it's own engine data panel - I think this is direct from the engine. After closing down the engine recently (following an uneventful cruise) a Preheat Alarm was displayed on my Lowrance Plotters (see pic). Apparently zealous crew had enabled all the available engine alarms on the Lowrance units which MAY explain why I'm suddenly seeing this - but I don't understand WHY I'd get a Preheat Alarm after shutting the engine off and not before starting? Is the system confusing two alarm types? False alarm? No alarms are showing on the Engine Panel and starting is normal.

Pikey Dave · 02 August 2016, 16:27

Disable the alarm on the HDS👍

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willk · 02 August 2016, 16:38

Quote:

Originally Posted by Pikey Dave

Disable the alarm on the HDS��

I fully intend to - really just wondering WTF?

Are these type of alarms common in this type of setup/barely setup?

Erin · 02 August 2016, 17:11

On the basis the engine panel is not showing an alarm presumably it's just a matter of a temperature threshold being crossed in the Lowrance unit making it sound an alarm. Can you delve into the Lowrance software and see what temp the alarm is set to sound at?

willk · 02 August 2016, 17:15

Quote:

Originally Posted by Erin

On the basis the engine panel is not showing an alarm presumably it's just a matter of a temperature threshold being crossed in the Lowrance unit making it sound an alarm. Can you delve into the Lowrance software and see what temp the alarm is set to sound at?

That makes sense - will do. Thanks!

Pikey Dave · 02 August 2016, 17:30

I find that the HDS has so many "alarms" that aren't actually alarms, more information notifications that I have disabled most of them, otherwise it's constantly beep/ping/ringing. Also it's quite likely that there could be a software conflict between the HDS & PGN sentence from the engine causing the HDS to mid-interpret the signal. Obviously a preheat alarm is nonsense when switching the engine off, ignore.

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Poly · 02 August 2016, 18:28

I suspect your "crew" is just making sure you can't go to see without a networking wizz on board again...

willk · 02 August 2016, 18:29

Quote:

Originally Posted by Poly

I suspect your "crew" is just making sure you can't go to see without a networking wizz on board again...

I'm working on his "punishment". Even by my standards, it will be spectacular.

jambo · 02 August 2016, 19:16

Quote:

Originally Posted by willk

I'm working on his "punishment". Even by my standards, it will be spectacular.

Careful now. The same gentleman has helped over the years. I think he was making sure you were safe if he ever had to leave you again!!👍🍺

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