Zanussi FS1255 s

[paulsk2]

Hi,

I have a zanussi fs 1255 s (prod 914791104). It’s around 11 years old and has worked very well. Until…

Tried to use machine. No lights or activity. Checked fuse and replaced this. Power now being delivered to the machine…

Now the following happens after a programme is selected…
Cycle starts.
Interlock (bitron dl s1) clicks to attempt operation.
End button flashes 4 times.

This error code indicates lock problem.

I’ve looked at the interlock and opened it. I can see some black smoke around a part that I assume holds the lock closed for x amount of time after a cycle is stopped – the rest looks clean. However it’s clear the interlock isn’t doing it’s job, so I’m assuming that the part with the black smoke has failed.

Before I head off and order another interlock,
1. are there any checks I should do to the interlock to confirm it’s the problem. Eg continuity or resistance etc..
2. is there anything else I should look at that could have been affected by the interlock blowing (if that is indeed what has happened)

If I can sort this out at a reasonable cost, then happy to do this, as I really don’t fancy a replacement at the moment!

Cheers for your help.

Thanks.

Paul

[Martin]

Re: Zanussi FS1255 s

The interlock is knackered my friend, invest in a new one your only option.

[paulsk2]

Re: Zanussi FS1255 s

Hi Martin,

Thanks for your reply.

I’m not sure if you or anyone else can offer advise now I’ve had a better look.

I’ve finally found the time to open it all up.

1. The interlock has black soot and what appears to be a blown section (the bimetallic timing section? I’m not really familiar with these, so that’s a guess based on how it looks. Can photo and post if it helps).
2. The pcb has blown tracking and a section that also looks damaged.

The blown track is directly connected and next to where two wires from the interlock connect.

The section of the board that shows signs of damage is beneath, towards the edge of the board.

I have photos of the board – front and back, if it helps, so am posting these.

My questions are;

1. If I replace the pcb and interlock with a reclaimed pcb and new / reclaim interlock, will this fix the problem?
2. I have a reclaimed rold interlock (DF series 132441800 f02510), rather than bitron dls1. Is this a valid replacement? I’ll spend the few quid extra for the bitron, if that’s the better option – there are plenty of new and reclaims available.
3. Anyone have an idea, based on experience of how long this repair would last? I reckon the pcb and interlock will cost £45 – which is fine if it stops it heading to landfill and delays a new machine being needed, but obviously not great if it only lasts a month or two!
4. Is there anything else I should look for that may have been either damaged (wiring loom? etc..) or have caused the damage?

Thanks for your help.

Paul

[Martin]

Re: Zanussi FS1255 s

paulsk2 wrote:1. If I replace the pcb and interlock with a reclaimed pcb and new / reclaim interlock, will this fix the problem?

I’m suspicious of the word “reclaimed” so I doubt your problems will be solved. More problems ahead I reckon. 🙁

paulsk2 wrote:4. Is there anything else I should look for that may have been either damaged (wiring loom? etc..) or have caused the damage?

I pretty sure your problem source was the interlock. They fail very often and blow the PCB as they go, very commonplace. Especially so if folks use the machine and go away ( to work or to bed for example) and leave the machine switched on for hours and hours. The interlock overheats and BOOM!

Rubbish machine, no safety barriers in place to safeguard the electronics, but then today ALL makes are built like this. Little comfort I know but true nonetheless. 🙁

[paulsk2]

Re: Zanussi FS1255 s

Hi Martin,

Thanks for getting back to me again on this.

Reclaim = ripped from an old machine. It won’t be perfect, but for £30 maybe I get my machine back for a while longer. I will see if I can find a new one, but when I first looked at around 100 quid, it’s just not worth it. Machine would have to run trouble free for around 5 years! No chance surely?

With an interlock costing around £15 (new), then the combo need to keep the machine running for around 2 years for it to be better than buying a new one (assuming we are lucky enough to get 10 years from a new one @£250).

Is there anything else I can easily check before I buy the parts? is there another part that would have been affected when these two blew up?

So interlock – yes guilty as charged – machine has been left to run later at night or run while we are out.

Hmm – not easy to know what to do if I do have to replace this week.

Paul

[Martin]

Re: Zanussi FS1255 s

paulsk2 wrote:Is there anything else I can easily check before I buy the parts?

There are no less than 3 variants of PCB that fit this series of machine. None of which are interchangeable, so your “reclaimed” unit is unlikely to work. Or at best a one in three chance and that’s assuming the board hasn’t been corrupted by static meanwhile?

paulsk2 wrote: is there another part that would have been affected when these two blew up?

Can’t rule that out.

paulsk2 wrote:So interlock – yes guilty as charged – machine has been left to run later at night or run while we are out.

Spooky how I figured that huh? 😉

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