Halstead BCCs (boiler control chips) - I'm totally baffled

[DaveyH]

Hi,

My Halstead Eden CBX 32 (Natural gas) boiler's PCB failed, so I bought a 2nd hand one taken from a Halstead Eden CBX 24.

This is no problem (or so I thought), because the PCBs for these boilers are all the same (see Halstead part number 988488).

Anyway the second hand CBX 24 PCB came with a CBX 24 NG (natural gas) BCC chip fitted to it (see Halstead part 500682)

My original PCB didn't have a BCC chip fitted to it, so I thought just take the CBX 24 BCC off and it will work.

However, when I switch on the boiler, I get the following error.

Untitled

• DaveyH
• 19 Aug 2013
• 1

The error means Incorrect /missing BCC - replace BCC

Does anybody know what I need to do to get this PCB working in my CBX 32 boiler?

Is it just a case of buying a CBX 32 Natural gas BCC (Halstead part 500690) or is it not possible?

Thanks in advance.

 

[mfarrow]

It could be a switch or jumper is needed to be set/unset. Check against the old board, if you're sure the PCB versions are the same.

 

[Tom1981]

The chip is required so the PCB knows which appliance it's fitted too. So without this chip the PCB will not progress. More than likely there's been a upgrade to the boards. A new PCB would have a selection of chips supplied with it.

It's been a while since I've worked on a Eden, but generally allot of makers are going down the swappable chip route.

 

[DaveyH]

It could be a switch or jumper is needed to be set/unset. Check against the old board, if you're sure the PCB versions are the same.

Thanks for replying, but neither board has any switches on jumpers on it.

 

[DaveyH]

The chip is required so the PCB knows which appliance it's fitted too. So without this chip the PCB will not progress. More than likely there's been a upgrade to the boards. A new PCB would have a selection of chips supplied with it.

It's been a while since I've worked on a Eden, but generally allot of makers are going down the swappable chip route.

Thanks for your reply.

I think will just buy a CBX 32 NG BCC (halstead part 500690) and see what happens. I can't see why it wouldn't work.

From reading the manual, I recon after fitting a CBX 32 NG BCC

LEDS 1,2,3 will light up, I will then press the reset button and the BCC will marry to the PCB.

Here is the relavent bit from the manual (circled in red)

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• DaveyH
• 19 Aug 2013
• 1

 

[ianmcd]

Have you tried the reset procedure from the Installation instructions ?

a) Press the Reset button. The Reset LED and LED 1 should flash once.
b) Wait approximately 5 seconds, while the control is reprogrammed
and then press the Reset button, to initialise the control.

 

[DaveyH]

Have you tried the reset procedure from the Installation instructions ?

a) Press the Reset button. The Reset LED and LED 1 should flash once.
b) Wait approximately 5 seconds, while the control is reprogrammed
and then press the Reset button, to initialise the control.

Yes I've tried that, it just stays like this.

Untitled

• DaveyH
• 19 Aug 2013
• 1

When I buy and fit a CBX 32 NG BCC (halstead part 500690) to the PCB, I recon what you're saying will work. I will report back in a few days after I've ordered one.

 

[matt1e]

Have you tried the reset procedure from the Installation instructions ?

a) Press the Reset button. The Reset LED and LED 1 should flash once.
b) Wait approximately 5 seconds, while the control is reprogrammed
and then press the Reset button, to initialise the control.

Yes I've tried that, it just stays like this.

Untitled

• DaveyH
• 19 Aug 2013
• 1

When I buy and fit a CBX 32 NG BCC (halstead part 500690) to the PCB, I recon what you're saying will work. I will report back in a few days after I've ordered one.

I reckon so too

 

[Agile]

I am surprised that you expected the PCB to suddenly become a 32 kW pcb when you had removed the 24 kW chip.

My logic tells me that a 32 kW chip is expected.

Some electronic devices can only be programmed ONCE to be another variant!

Let us know how it behaves with a 32 kW chip!

Tony

 

[DaveyH]

I am surprised that you expected the PCB to suddenly become a 32 kW pcb when you had removed the 24 kW chip.

Thank for replying.

I expected that, simply because my original Halstead 988488 board had no chip on it. So I assumed without a chip, these boards must default to CBX 32 operation. I'm still confused to be honest, and I have a horrible feeling that, what you say here

Some electronic devices can only be programmed ONCE to be another variant!

might be true.

I will let you know how I get on.

UPDATE:

The Halstead spares catalogue, also seems to imply these boards "default" to CBX 32 NG operation.

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• DaveyH
• 20 Aug 2013
• 1

The Halstead spares catalogue, also implies there is no such thing a CBX 32 BCC NG. There no entry for part number 500690 in it.

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• DaveyH
• 20 Aug 2013
• 1

However, loads of companies appear to be selling them, google "Halstead 500690" and you will find them. I'm even more confused now.

 

[mfarrow]

It's probably something that's been developed out of necessity, because of the single time programming of the PCB to accept a BCC.

I would buy the chip and fit it, unless you can find a way of detaching the old BCC electronically. Without the proper programmer, though, a way of connecting it up, and knowledge of which part of the EEPROM to change/clear, I doubt you will be able to.

 

[DaveyH]

After waiting 3 and a half weeks!! My CBX32 Natural gas boiler control chip finally turned up in the post. (The company I bought it off blamed Halstead for the delay.)

Anyway, I attached it to the PCB and turned on the boiler. As predicted I was presented with this error message.

Untitled

• DaveyH
• 18 Sep 2013
• 1

The error means that the PCB has detected a new BCC has been fitted to the board.

A press of the reset button and the boiler came on normally. Well normally for this boiler, because I still don't have any bloody hot water, which is why I bought another PCB in the first place. See this thread.

//www.diynot.com/forums/plumbing/halstead-eden-cbx-32-boiler-no-hot-water-and-lock-out.370892/

 

[matt1e]

I have posted what to check, in your other thread

Matt