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Ariston Margherita CDE 12 X. Pmax:1850W. I=10A. 1200 rpm. Type Nº LVA2000C.
Back bars code: CDE 12X 080272260000 32 550 210088534
Module ID: COD.215007040.00. 3902 SW2.22.
uController: 64 pin MERLONI. LBV V2.22. HD6433642RB95P. 0232 JAPAN.Some time ago it started with this problem: sometimes (it did not occur every time, maybe depending on the load level ), in certain programs it would not run through the steps until the end – it would stay in a washing step for ever – I had to go and mannualy turn the selector one step, and then it would finish the rest of the program steps by its own.
First I looked at the selector – it seems fine. I visually checked for damaged devices and I’ve checked the water inputs and outputs and the filter in the bottom. I checked the electronic module and did not find any burned parts. I though maybe a voltage spike damaged the eeprom. I bought a new eprom at the local Ariston support – he told me that there is only 1 chip version for the CDE12X. Ref. in the box is
EEPROM CDE1 12X SOFTWARE 28272660031.
My PCB is an original one, so the eeprom is soldered. I replaced the eeprom and after re-assembling, resetting and turning it on, it starts water filling up, but suddently stops; after a few moments it repeats this and keeps doing it – every time this happens the power LED blinks (looks like) 3 times. It looks like that the electronics is pulsing on the water input stage electrovalves…
If it would be a problem with the eepom I would expect the new one to fix the problem. If it would not be a eeprom problem I would expect a behaviour as with the old eeprom.
I guess error code 3 is a heated/thermistor/board issue; But shouldn’t it happen as well with the old eeprom?
Any clue on this? Is there any other eeprom versions and I would have a wrong one?
I was planning to buy a new electronic module, but now I am not sure it will fix it.
Any suggestions are welcomed.Re: Ariston Margherita CDE 12 X EEPROM incompatibility?
Are you posting from Portugal, if so the model numbers and hence the part numbers may not be the same as the ones used in UK models.
You don’t mention testing the heater for continuity or resistance. If the heater is OK then it does sound as though the main PCB is faulty, they have a very high failure rate on machines in the UK. 😥
Jim.
Re: Ariston Margherita CDE 12 X EEPROM incompatibility?
Hi Jim,
Yes I am posting from Portugal, but the washer is a 2002 Italy product.
I’ll do that test and get back to you. What should I be looking? Resistance on the temp sensor? (Round device where 2 thin wires are connected to?) I guess there’s one in the top (heater?) and one in the lower back (drum?). Should I check both? I would be looking to ~20kOhm with main power-off?BTW, if the problem is not in the eeprom, shouldn’t I be getting similar results with both eeproms? What should I conclude? Can you confirm if there is only one eeprom version for the Margherita CDE12X?
Thks, Joao.Re: Ariston Margherita CDE 12 X EEPROM incompatibility?
The UK parts software only covers models sold in the UK so I have no way of knowing if your part numbers are correct. Our friend in Romania, Baron may have a better idea.
The main water heater at the back of the drum near the bottom will cause the machine to stick in the programme if it is open circuit but is not usually an intermittant fault. A resistance of around 22 to 25Ω should be about right for the heating element.
As I mentioned the electronics on these machines do seem to be very unreliable and prone to failure particularly on the heater circuits and components.
Jim.
Re: Ariston Margherita CDE 12 X EEPROM incompatibility?
Hi Jim,
I checked the resistance on the heaters.
32Ohm for the main heater at the back of the drum and 44Ohm for the heater at the top dryer.
I also measured the resistance for each sensor (thermostat): 8.5kOhm for the first and 3.5kOhm for the second.
Should these be OK?
If so, do you have any other suggestion for debugging?Joao
Re: Ariston Margherita CDE 12 X EEPROM incompatibility?
Both element readings are spot on.
The wash thermistor(NTC) should be 20KΩ at 20°C
The dryer thermistor should be 26KΩ at 20°C
Double check your readings, unusual for both NTC’s to be so far out unless it is very hot in Portugal just now. 😉
Sadly it usually always ends with a module and eeprom change though.
Jim.
Re: Ariston Margherita CDE 12 X EEPROM incompatibility?
Hi Jim,
The measured resistances are the ones that I indicate before and temperature should be around 20º.
Should the difference to the expected resistances indicate damaged devices or in that case would they always be in open circuit?
Do you recomend trying new thermistors? Any other suggestion before a new PCB board?Re: Ariston Margherita CDE 12 X EEPROM incompatibility?
I wouldn’t worry about the dryer one for now. I don’t get many thermistor failures of this type to be honest. I have had a few of the disc type that is fitted to the Indesit range but the one that slots into the heater is generally more reliable.
The wiring and plugs are very weak and even a loose plug connection can cause this fault. Gently squeezing the small plug that fits into the thermistor and doing the same to the module contacts can sometimes help.
Given the huge cost difference between module and thermistor I don’t suppose it would do any harm to try one first.
Jim.
Re: Ariston Margherita CDE 12 X EEPROM incompatibility?
Testing the element for correct resistance is not a proper test of the element. You are only testing for the correct continuity.
You should also check for earth leaks using a megger at 500V which will often not show up using a DVM. Either take time to familiaising yourself with a megger safely or call the manufactures as there is no point in replacing the module if its not the fault. (unplug before, no live testing!)Also I personally have found the modules are often faulty and have never just changed the eeproms, this I believe is something normally only done by manufactures who can reprogram them on site.
(the modules on the washer dryers suffer from condensation damage from the dry unit above, when you get it working put the module in a plastic bag to prevent this happening) good luck
Re: Ariston Margherita CDE 12 X EEPROM incompatibility?
Hi,
Thanks for the replies.
FYI, the resistance on the thermistors are +/- 23kOhm. Before I was measuring without unplugging the electric wires connected to the module and that is the reason for the difference in the numbers that I indicated before.
So I guess there are not open circuits, but can I conclude they are working fine? I mean, couldn’t they be triggering on a different temp, if they were defective? This is just an idea, but if they would be ‘reading’ a wrong temp, it would explain why it does not give any error message (with original eeprom) but does not finish the wash cycle, wouldn’t it? It would be waiting for ever to get to the 40ºC temp!Meanwhile I have unsoldered the new eeprom and solder again the original eeprom and the washer is again working as before, i.e., it does the washing but need to move from washing to drain manually and then it drains, rinses and spins as expected.
I got the new eeprom from an Ariston office. It is the eeprom for my washer module (the model is writen in the chip box). As it is not working at all in my washer, do you think that it could be not programmed (void) or needing some custom prog fitting?
I have tested most of the pcb components and all seems to be OK including the analog IC’s. The ones that I can not test are the eeprom and the (huge) Merloni u-controller. Do you think I can buy a u-controller to Ariston without getting the complete module?Re: Ariston Margherita CDE 12 X EEPROM incompatibility?
PS: Just FYI, I don’t have a megger, so I have to rely for now on the multimeter.
Re: Ariston Margherita CDE 12 X EEPROM incompatibility?
BTW, assuming this theory of defective heating circuit to be correct, which element should I expect to be defective: the thermistor or the heater?
Re: Ariston Margherita CDE 12 X EEPROM incompatibility?
It does sound as though both your elements and thermistors are OK, but
have you checked the insualtion of lower heating element?The control module is still the most likely cause of your fault but as I have mentioned we cannot tell if you have the correct parts, the UK machines will almost certainly have different part numbers to the ones sold in Poertugal.
It may be time to see if you can find a local Ariston engineer. 😥
Jim.
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