Volvo penta 2030 vanishing alarm

[Chanquete]

Hello friends.
Two minutes after starting the engine instantanly without any problem, a faint alarm sounds for about 5 seconds and goes off. All instruments indicate correct values. the engine runs perfectly.
What can it be?
Thanks in advance!

 

[Plum]

Hello friends.
Two minutes after starting the engine instantanly without any problem, a faint alarm sounds for about 5 seconds and goes off. All instruments indicate correct values. the engine runs perfectly.
What can it be?
Thanks in advance!

I once had a similar problem on a different engine and the faint alarm coincided with a faint glow of the alternator warning light. If I increased revs both went out. In my case the alternator needed new brushes.

www.solocoastalsailing.co.uk

 

[QBhoy]

I’ll take a guess at the oil pressure sensor being faulty

 

[VicS]

Hello friends.
Two minutes after starting the engine instantanly without any problem, a faint alarm sounds for about 5 seconds and goes off. All instruments indicate correct values. the engine runs perfectly.
What can it be?
Thanks in advance!

Start the engine after dark and look closely at the warning lights while the alarm is sounding faintly. If any one is glowing slightly it will be a clue as to which sensor, or alternator, is the cause.

(If the alternator is the cause you may find that both "no charge" and temperature lights glow)