[fringe]

Re: F&P GW709AU

Just found some who had posted the same for a IW709
sorry if i double up!
any his post is under topic IW709 Fills up then Error 39
he belives it is a .1uf
i will try this tommorrow

regards mark

[fringe]

Re: F&P GW709AU

Hi all,
I was able to take a look at the water level indicator today.
As has been previously mentioned it is a moving coil. The basic operation is that when positive pressure is applied to the diaphragm by the water level raising within the tube connected to the water sensor unit, it moves the ferrite bead located internally. Which turn changes they inductance of the coil. However, it is not change in voltage the microprocessor is looking for. It is actually a change in the oscillator frequency as the ferrite bead moves up or down the frequency will increase or decrease accordingly

Before going into the micro it square up by a 78C04 producing a square wave proportional to the input freq

The change in frequency is the applied to micro and compared to its reference oscillator frequency

However, when I measured the original timing capacitor it measured 225nf
The measured frequency at that time from the water level circuit ranged from 72 kHz to 83 kHz
Changing this capacitor to 220nf changed the output frequency.

The measured frequency now from the water level circuit ranges from 68 kHz to 79 kHz

Well this is where I am at, at present F&P can’t come until Wednesday so I don’t have another board I can check the correct values.

For all I know the value could have been 330nf and because of error in current value the processor see the resulted frequency to be out side it range it shut it all down.
So can someone measure the capacitor and post its value.
The timing cap is located bottom far right hand side with the board facing down, first cap in from the edge nearest the coil.

Ps since changing this cap to 220nf I receive a new fault code 00001011
Which I bet is water level related, further more the machine seems to be trying harder to get going so I believe i am near the frequency range

Please checks the info provided and correct me if I am wrong.

just another thought if you have a cro just measure the frequency on the legs of the coil when empty and full if you cant measure the cap or post both

Kind regards
Mark
Ps sorry the post was so long

[fringe]

Re: F&P GW709AU

Thanks Penguin,
The information you provided is spot on, i failed to mention that initially the machine wouldn’t empty; straight away i attended to the water level mech.
Firstly blowing through the tubes, secondly i pulled out the controlled board and dismantled the water level mech (which in this model is a moving coil) there was no problem with the coils or the diaphragm.
so thats when i found your site, iwas led to the hot and cold valves through some posts, in a way i am glad as the hot soleniod was already bubbled as showing signs of immenant failure,

So based on the fault code indicates that it is to do with the water level i suspect that the surface mount caps or comparator network are at fault. I will change all associated capacitors first, and let you know the out come.

however, is there a reset proceedure for setting this board to default and then programming it to 7.5kg?
Regards
Mark

[fringe]

Re: F&P GW709AU

Hi all,
thankyou for providing this forum !

Firstly if is possible could someone email me the fault code index for Gw709au,
also a detailed instruction on how to reset the machine after a board change. 7.5kg Excellence

Firstly i developed a fault code 01100010 right hand side 0 being the spin light,
after reading all the forum post relating to this machine, i checked both the cold and hot water valve for an open cct, however none were
cold water was 64 ohms hot water was 41 ohms, so i purchased a hot water valve new it measured 62 ohms, however the fault still existed
after following a few other proceedures that have been described i have had that fault code go away and another develop this time it is 01000001 right hand side 0 being the spin light, i am having the whole motor controller board replaced today as we need it working, but i have asked the wife to make sure he leaves the old board, i have the skills to hunt the the faulty cap or ic but as you know you do it the hard way or with some assistance.
by knowing the fault codes and how to reset the board to operation for this model i can check that i have fix the problem by swapping the old board in and out
will post results for others to fix this expensive item
email codes and reset to: mkilburn@kooee.com.au if possible.

if i have attacked this machine wrong please let me know
kind Regards
Mark

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