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My F45010W0 (type 911D12611L) stopped mid cycle with no display showing. Online searches showed that dry joints in the control module may be to blame but I found none. Instead I see that the switch mode power supply on the PCB that provides low volts for the electronics has no 350VDC on its input capacitor C26. The LNK362GD switching IC U2 is short circuit, which has blown resistor R67. I have ordered new ones and 2 of the nearby rectifier diodes, which do test OK, but may be damaged.
Anyone got a similar module and can tell me what value R67 is supposed to be as the overheating has discoloured its identifying colour bands? It could be 47 or 470 ohms. Can’t find anyone who sells this 2011 module which has numbers on it including:
156118800
EDW750
Computime ELED035
Electolux 1113370 42
EMH13 FR
EUH10 FR
Although I am an electronic engineer, repairing these sorts of power supply is not simple so replacing these bits will not fix it if there was some other cause that triggered IC failure.
We did have a lightning strike nearby last week that blew the mains but not aware that the dishwasher was on at the time. There is apparently no mains on the electronics if the front panel dial is set to Off but there may be a way for a spike to feed into the electronics through another part like a drain pump.Re: AEG dishwasher F45010W0 control module dead
dont know the board but repaired many of these supplies
is the resistor in quesion in series with the mains power feeding the board
if yes they use a low ohm fusible resistor to feed the board so if the chip goes short it blows. it also acts as a surge arrester so when you switch on the plug the capacitor charging current is not to high
if yes to the above it will be 47 ohms
Dave
Re: AEG dishwasher F45010W0 control module dead
Great reply thanks. Yes it’s a resistor in series with live mains feeding a VDR to neutral and a diode to the capacitor.
The 3rd resistor band is dark brown now and could be burnt black or discoloured brown.
Think I will change the VDR too as lightning could have damaged it. They are only good for a certain amount of spike(s).There are 2 other VDRs near some triacs that presumably switch the pumps. Anyone aware how to test a VDR other than a resistance check?
As an aside how does the air heating work that dries the plates at end of cycle? No sign of a heater other than the tubular water one in water pipe. Also it’s supposed to condense the water driven off in this drying and don’t see how that works.Re: AEG dishwasher F45010W0 control module dead
water is hot at the end, rinse aid lowers surface tension in the water so it falls off
if vdr,s have failed it will mean whichever component it feeds will not turn off. in a word try it and see what happens if you fix the power supply
Dave
Re: AEG dishwasher F45010W0 control module dead
The VDRs measure on a DMM as 5M ohm or more so are presumably either OK or so blasted with spikes that they are now open circuit and unable to absorb any more spikes. Can’t tell which. When temporarily directly connected across mains they do not blow any fuses.
Re: AEG dishwasher F45010W0 control module dead
Have fitted a new IC and VDR and all is well. The IC was probably the only failed or partially failed component. Did not change the diodes as could not get the right ones quickly.
As a reliability and safety engineer am a little surprised that this IC is a problem compared with all the other suspects like motors, pumps, heaters and triacs that I’d think were more likely to fail. Maybe the power supply circuit design is flawed, like being so cost minimised they have scrimped on reliability; nothing 50p extra could not have solved.
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