Repairing a CBE M2010 distribution board

[John Russell]

Our CBE distribution board (dating from 2001) seems to have gone on the blink.

Two or three circuits out of five are getting no power.

The rear lighting circuit stopped a couple of weeks ago which I put down to a bad connection and ignored. A few days ago the front lighting circuit and radio/TV/entertainment circuits also stopped. Both are showing a few mV.

Heating and gas fridge are still coming on, so it's not all bad.

Fault finding with jongood's help:

1. 13.4+V coming into the board, batteries with a full charge plus Victron solar
2. Fuses are fine
3. Breakers are 50-100mΩ resistance (less than the several 00 on the one I replaced)
4. Rebooted board by switching off batteries and solar, waiting, then restarting
5. I can't see any sign of damage to the board

The board is designed to close off circuits, lighting first, to conserve power as the battery voltage drops, so it looks like it is mistakenly doing this.

I haven't found a schematic or service manual for the unit. One for another version might be helpful.

I could replace the parts myself if I knew where the problem was.

CBE in Italy will repair, only via a dealer, and slow and expensive.

Unless anyone Lenny HB funflair jongood has better ideas, my next port of call is to find someone who can figure out how the cutout circuit works, and replace the faulty component(s).

Steve and Denise Lenny HB said

@Steve and Denise knows a man who repairs them

If anyone has more detailed knowledge of how these boards operate, what might be wrong, or can suggest a repair service, I'd be very grateful!

TIA

John

 

[Steve and Denise]

Our CBE distribution board (dating from 2001) seems to have gone on the blink.

Two or three circuits out of five are getting no power.

The rear lighting circuit stopped a couple of weeks ago which I put down to a bad connection and ignored. A few days ago the front lighting circuit and radio/TV/entertainment circuits also stopped. Both are showing a few mV.

Heating and gas fridge are still coming on, so it's not all bad.

Fault finding with jongood's help:

1. 13.4+V coming into the board, batteries with a full charge plus Victron solar
2. Fuses are fine
3. Breakers are 50-100mΩ resistance (less than the several 00 on the one I replaced)
4. Rebooted board by switching off batteries and solar, waiting, then restarting
5. I can't see any sign of damage to the board

The board is designed to close off circuits, lighting first, to conserve power as the battery voltage drops, so it looks like it is mistakenly doing this.

View attachment 950675

I haven't found a schematic or service manual for the unit. One for another version might be helpful.

I could replace the parts myself if I knew where the problem was.

CBE in Italy will repair, only via a dealer, and slow and expensive.

Unless anyone Lenny HB funflair jongood has better ideas, my next port of call is to find someone who can figure out how the cutout circuit works, and replace the faulty component(s).

Steve and Denise Lenny HB said


If anyone has more detailed knowledge of how these boards operate, what might be wrong, or can suggest a repair service, I'd be very grateful!

TIA

John

Speak to David @ Teleserve Lincoln

 

[John Russell]

Sent him a picture - waiting to hear what he thinks.

He did say he'd worked on newer CBEs as well as boards from many other makes of motorhome.

 

[John Russell]

Ps Thanks Steve and Denise for the link