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D1-30 alarm after pressing on button

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Category: Hints & Tips
Forum Name: 385/388
Forum Description: 385/388 Hints, Tips and News
URL: https://www.myhanse.com/forum_posts.asp?TID=15192
Printed Date: 27 March 2026 at 03:40
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Topic: D1-30 alarm after pressing on button

Posted By: Henryk
Subject: D1-30 alarm after pressing on button
Date Posted: 17 June 2025 at 18:28

Hello, I hope that may be my issue will be helpfull for you. Engine D1-30 volvo penta.

After pressing 'on' button very soon alarm starts to ring. On display appears a triangle with exclamation mark. Manual says that could be short or open circuit.

When I started the engin alarm stoped ringing. After checking all cables connecting MDI box with engine control panel I have found everything ok.

The reason was the wrong glow plugs (open).

The MDI box is checking the all sensors and also glow plugs for very low resistance.

(about 0.5Ohm, one glow plug has about 1,5 OHM). Interesting is that the check fails when all 3 plugs are burned. And it was my case. To make sure that this is the cause of the alarm (I did not have a new glow plug) connect the 12V bulb to the heating wire of plugs and press the on button.

The bulb simulates the glow plugs ( resistance1,2 OHM) in good cindition.

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Henryk