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Fisher & Paykel GW709 AU  Rating:  Rating
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 Posted: Tue Apr 7th, 2009 04:13 am
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Strung
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This was a give away that at the time I thought was too good to be true.

Went down mid cycle on the weekend full of work clothes and school uniforms....traitor!!!!!
No lights, bells, whistles, squeaks, farts..... nothin.
Fuse 124 slow blow 2A gone open.
Replaced fuse.
Returned board to machine, fully installed.... hope springs eternal!!!
Hope vanished with small puff of smoke and a tiny "pop" as 15v reg exploded, along with its part number.......
Found on another forum (yes, forum harllet) with no answer to someone complaining that this problem had fried two boards so......  "am I looking at a shorted peripheral " I wondered while reaching  for the meter and heading downsatairs again.....

Help Please.

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 Posted: Wed Apr 8th, 2009 02:12 am
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Samurai Appliance Repair Man
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So you've not replaced the entire board, just the fuse?

Check the resistance of the motor windings to ground and same test for the pump. Have your meter on the highest setting (Rx1K). A good reading is OL or infinite resistance.



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 Posted: Wed Apr 8th, 2009 11:26 pm
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Strung
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I have not replaced the board, just the fuse.

Motor and pump windings tested to ground are open circuit, ie. 0 ohms, while the windings themselves give me 30 ohms.

The componant that vapourised was a "small" surface mount three pin device with the middle leg and soldered heat sink common to the marked 15 volt rail, probably not a reg as phisically far too small for the amps required.

The board appears to have been repaired before with the only clue being some of the "green" sanded away (perhaps for test point access?) and the abraded areas coated with something like petrolium jelly...... yuck.




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 Posted: Wed Apr 8th, 2009 11:55 pm
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RegUS_PatOff
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Strung wrote: ...Motor and pump windings tested to ground are open circuit, ie. 0 ohms,

0 ohms is a short

open circuit is "infinty" (infinite ohms)

check the windings of  the diverter valve, water pump and water inlet valves, for correct resistances.



 

Last edited on Thu Apr 9th, 2009 12:13 am by RegUS_PatOff



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 Posted: Tue Apr 14th, 2009 12:59 am
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Strung
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diverter valve?

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 Posted: Tue Apr 14th, 2009 03:18 am
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Strung
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oh sorry ... it seems i spend too much time on  my own.... I mean zero load.... open circuit...zip...  nada. nothin there.

As for a diverter valve, it seems that this model is not cursed
with that particular added complication.
A diverter valve being some kind of gate or ball on the drain hose? No, just a pump and a hose with no diversions, distractions or alt escapes on the way to the garden.

measured at the top deck connectors with board removed

all open circuit when measured to ground

30 ohms for the stepper windings

30 ohms for the pump motor winding

66 and 68 ohms hot and cold valves

All loom componants are in good order with no dodgy bits or repairs. Both the bowl and the pump spin freely by hand. There are no obstructions in the drain hose or pump. The control pannel passes a cursory visual. In the time I have had it, I have replaced a "OB" switch.

Board on back order from F&P, maybe here before I go into a nursing home.
Last time I ordered a part for a late model dish washer from them it took eight weeks to deliver as they had to "MAKE IT". But there is a seperate section for gripes.......


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 Posted: Wed May 13th, 2009 11:05 pm
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Strung
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The part still hasn't arived from F&P.
Note the date!!!!!

Is there abetter reason not to buy this brand?

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