Beko Dryer Lamp Flash & Moisture Sensor ( DPU 8360 W )

[McKenna32]

Hi all

This is very similar to this topic (not resolved) :https://www.ukwhitegoods.co.uk/forums/forum/public-support-forums/help-and-support/tumble-dryer-help-forum/864317-beko-dsc85w-interior-light-flashing

I’ve already detailed some of the background here: https://www.diynot.com/diy/threads/beko-dryer-lamp-flash-moisture-sensor-dpu-8360-w.598376/#post-5322558

However reading that shouldn’t be necessary, a very brief summary:

– Beko Heat Pump tumble drier bought used 1 week ago
– Lamp module is somehow unhappy – interior light flashes constantly
– Moisture sensor is not working (stops after 10 min) – bars don’t seem to be powered up (have shorted to no effect and cannot measure any V or A)

Questions I have are:

1) Can lamp unit failures cause the moisture sensor to be disabled? (long shot!)
2) What measurements should I get from a “working” moisture sensor (volts, amps, whatever) and has anyone successfully repaired just that part of the circuit by replacing device(s) on the PCB? (this is a well used drier, I’m not trusting it to be worth the expense of a new PCB at the moment)
3) (out of interest) why is there a smart lamp module anyway as opposed to a simple lamp on a door switch…

Thanks in advance!!

[electrofix]

McKenna32 wrote:

– Beko Heat Pump tumble drier bought used 1 week ago
– Lamp module is somehow unhappy – interior light flashes constantly
– Moisture sensor is not working (stops after 10 min) – bars don’t seem to be powered up (have shorted to no effect and cannot measure any V or A)

Questions I have are:

1) Can lamp unit failures cause the moisture sensor to be disabled? (long shot!)
2) What measurements should I get from a “working” moisture sensor (volts, amps, whatever) and has anyone successfully repaired just that part of the circuit by replacing device(s) on the PCB? (this is a well used drier, I’m not trusting it to be worth the expense of a new PCB at the moment)
3) (out of interest) why is there a smart lamp module anyway as opposed to a simple lamp on a door switch…

Thanks in advance!!

lamp failure will msot likely be led driver problem and wont affect machine

you will not get anything from the moisture sensors

as for the smart lamp module or why its smart, no idea

looking at pictures of the board, the sensor section seems to have a seperate power supply which may have failed

Dave

[McKenna32]

Thanks for the reply [USER=”4209″]electrofix[/USER] !

electrofix wrote:
lamp failure will msot likely be led driver problem and wont affect machine

So the lamp I believe is incandescent and it still works, just flashes when it shouldn’t, which I imagine is a failure of “smartness” in the “smart lamp module” thing.

electrofix wrote:
you will not get anything from the moisture sensors

What makes you say that? Because it’s broken or because the electrical signals are too subtle? This second one seems unlikely, I can run the wires out of the machine and put a scope on them or probe at the board so don’t think I’m just trying to poke a meter at them with the door open! 🙂

​​​​​​​

electrofix wrote:
looking at pictures of the board, the sensor section seems to have a seperate power supply which may have failed

Interesting observation…will have a further look at this!

Cheers

​​​​​​​Al

[electrofix]

see what you mean

thought it may have been LED
the smart board is an energy saving unit that makes sure the light cannot be left on. it will be the smart board thats faulty and probably the power supply on that board

the sensors are fed from the board but the voltages and current used is so small its unlikley you would get much on a meter. they use a seperate transformer on the main pcb to make sure of electrical isolation

what you can do is check the sensors are clean and no contamination

Dave

[Author]

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