Multi 24/3000 in Parallel Stopped Working

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barmal asked Dec 16, '19

Multi 24/3000 in Parallel Stopped Working

Hello,

I have 2 x 24/3000 in parallel controlled by a Digital Multi Controller that have been working fine up to approximately 2 months ago.

The Digital Multi Controller amp display went blank and all the lights on the controller came on and stayed on.

When the controller is switched off/on to either charge only or on the 24/3000 units can be heard to 'click' indicating switching on/off and the temperature light on both units flashes once only.

The mains power and voltage as been checked and found to be alright and all the cable connections between the units and controller have been checked and cleaned and re-connected with no change whatsoever, the system still does not work.

Does anyone have any ideas as to what is causing the failure and how to rectify and make the system operational again.

Thank you in anticipation.

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2 |3000

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Answer 1 · 2019-12-16T18:32:51Z

Justin Cook answered · Dec 16, 2019 at 06:32 PM

@barmal, have you checked to ensure that the Multis have good DC voltage? That is, not only that the connections to the batteries are good, but that you also have >~25.4vDC at the MultiPlus "Battery" connections. The most common cause of Multis failing to power on that I see is a blown fuse or bad connection between the battery and Multi... the MultiPlus is a DC device, so requires good DC voltage to power on, even when connected to shore power.

2 |3000

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Answer 2 · 2019-12-16T18:54:57Z

barmal answered · Dec 16, 2019 at 06:54 PM

Hello Justin, thanks for your input, Yes I have separate Kuranda connections system where all power cables from the batteries are fed in prior to being sent to the Multi units and back prior to going to the breaker panels, all are in good order with fuses also checked and ok.

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Answer 3 · 2019-12-16T18:58:10Z

barmal answered · Dec 16, 2019 at 06:58 PM

Should have mentioned in my original post to the forum, all the DC functions are working fine, it is only the AC output giving 240V to the ring main that is affected.

2 |3000

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