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Afternoon all, sorry to have to start with a request for help but I’m running out of answers.
I have the above machine, which has given me decent service over the last couple of years. It stopped the other day though mid cycle. It had done the wash, and emptied (although a little noisier to empty than usual) but would not fill to do the rinse.
I’ve got stuck in today to try and diagnose (done a few before and I’m a trained electrical/mechanical engineer, so had a few successes in the past 😀 ).
When the machine works correctly, on start up of any cycle there are three audible clicks (solenoid I assume) but not sure what all three are ?
1. Door locking
2. Pressure check valve to ensure the drum is empty
3. UNKNOWNIt’s now this 3rd one which is no longer there. Is this the fill solenoid ?
*Pump has been stripped, cleaned and tested – all in good working order
*Pressure valve has been checked and appears to be functioning correctly (resistance check while altering pressure etc.)Traced some wires back, and the red wire to both fill valves goes to the PCB control module, with the black and grey wires (cold and hot fill valves respectively) going to the timer module. I can read no voltage change at either fill valve no matter what condition the machine is set to.
Any way to progress the testing and prove out the faulty component from here ? Knowing the 3rd click I’m waiting for I guess would help ?
Any pointers/info would be VERY gratefully received guys, as I’ve got washing building up and can’t really afford a new machine as I got made redundant recently.
Thanks in advance 😉
Mike
Re: Diplomat APM 8552 – No Fill or Function
Door lock is a function of the mechanical timer unit – everything else is done by the pcb.
Measure the resistance of the two white w/w resistors. These burn out over the years and will give exactly the symptoms you describe.
Don’t live test – it shouldn’t be neccessary for this fault.
Penguin45,
Moderator.Re: Diplomat APM 8552 – No Fill or Function
Excellent, cheers penguin. I’m on it now. Will they have to be removed from the circuit to effectively test them or can they be left on the board (no idea of the rest of the circuit so I’m unsure in this case).
Know which ones you mean, felt them before when everything was on and they were warm (kinda to be expected though I thought, as they’re fairly high wattage items from memory)
Thanks again, I’ll post results shortly.
Mike
Re: Diplomat APM 8552 – No Fill or Function
Just checked the resistance and it’s 3.1Kohm which seems right as they’re 2 6.2Kohm 7 watt resistors in parallel. Any further thoughts ?
Cheers,
Mike
Re: Diplomat APM 8552 – No Fill or Function
Doesn’t sound hopeful then. Check the edge connectors for tight and secure fitting of contacts – oxidisation issues are common. Pump out of circuit will prevent the machine from filling.
Third click is the relays on the pcb.
I suspect that you’re looking at a logic problem in the end – these pcbs are notoriously unreliable. If you go for replacement, the number starting 546——– is the part number.
Penguin45.
Re: Diplomat APM 8552 – No Fill or Function
Cheers Penguin.
Had read today that the PCB’s are no longer available – is that not the case ?
Worth stripping the two relays from the board and testing/replacing ? Thought it may be burnt out coil etc. hard to see as the casing’s orange instead of the usual clear one 👿
I’ll pull all the connectors off, clean and refit but everything looks in good condition to be fair. Any idea whether it’s possible to get a circuit diagram for the board anywhere ?
Thanks again,
Mike
Re: Diplomat APM 8552 – No Fill or Function
Original p/no may not be available, but there is usually a superceded number available.
Seems unlikely that both relays would fail together………
Tech info on these has comedy value, I’m afraid to say. I’d struggle to find a general circuit diagram, never mind a board level one.
Penguin45.
Re: Diplomat APM 8552 – No Fill or Function
Thought as much. Had a scan over the pc side of the board and I ‘think’ I can see a tiny shred of evidence of arc’ing between two terminals on one relay. It’s hard to tell as the lacquer is thick in places, but I feel it may be worth a £2 shot and replace the relay before splashing out on a new board or condemning the machine.
Any ideasa where to get a board from if it comes to it ? On the whitegoods website the one listed for my m/c just says no longer produced, and no other part available.
Thanks for your help bud – you’ve been great ! Nice to have 2 brains on it (one with obviously more experience haha)
Mike
Re: Diplomat APM 8552 – No Fill or Function
546060201 0228
Not sure if you needed the last bit but put it up just incase.
Cheers,
Mike
Re: Diplomat APM 8552 – No Fill or Function
Hi Penguin, relays came this afternoon.
Have swapped both the relays on the board, but no success. Before I rush to try and get a board tho, I’m a little puzzled…….
I’m still only getting two of the three familiar clicks when the machine tries to start – however, one is cleary the door lock, and I can now definitely tell another is coming from one of the relays on the board. So where exactly should all 3 relay clicks be coming from ? As I’m not 100{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d} sure my issue may be the board now ?
Also, what should the voltages be at the pos and neg terminals of the water fill valves for the incoming water supply ? As I seem to have 230v at both !?!? is this correct ? I know only the red wire is fed from the PCB, and the ‘neg’ on each valve goes to the mechanical timer control. Is it pulled down to zero from here to make them operate ? Is it possible I may have an issue here rather than the board ?
Many thanks in advance mate – do appreciate your help.
Mike
Re: Diplomat APM 8552 – No Fill or Function
Just as an aside, can someone verify the correct colours/connections on the pressure check valve ? Obviously it was taken off to be tested, and I’m 99{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d} sure it’s back on correctly, but there’s the tiniest shred of doubt in my mind now I can here the PCB relays working. Just wanna make sure I have everything covered 😕
Mike
Re: Diplomat APM 8552 – No Fill or Function
Penguin45 – are you there ?
Looking for my font of all washing machine knowledge 😆
Hope you had a good weekend, 😉
Mike
Re: Diplomat APM 8552 – No Fill or Function
Yup, still here. I do try and have a life around appliances! 😀 .
Not sure what else I can tell you really. If you’re getting both relays clicking over on start up, you’ve made progress. I suppose you’re down to component checking now. You know that the lock works; resistance through inlet valves and pump would be the next step, brushes in the motor can do some odd things, earth faults on the heater can do some very strange things.
Once you get into board level stuff, it can get very complex and it’s over the heads of most of us – we simply don’t have that much time per job.
Penguin45.
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