Question about Fisher and Paykel 24 in. DD-602 Built-in Dishwasher

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Model 601V2 dishdraw showing U3 error message

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I have had my Fisher Paykel dishdrawer for 8 years and it has never completely worked. I would get a U3 code on the top drawer intermittently. I have had my drains rerouted twice, LP - HP reset, service men replace the back flow flap and mother boards without luck... until I was able to get my hands on the service manual. Turns out the solution is quite easy. If you have a problem with the U3 code it means the drawer is not draining appropriately, The washer only gives a preprogrammed 60 sec to drain the drawer. So if your drawer is overfilled, it will think it has a drain problem. The following is taken from the service manual...

"U3 - Time to fill was too short, indicating water was still in the tub.
Possible Causes:
· Drain pump is blocked.
· Drain hose is blocked.
· Sprayarm or rotor not turning
freely.
· Motor electronics have failed.
· Machine set to 'LP' on a high
pressure water supply.

The tub fills with approximately 2.2 litres of water, level with the base of the spray arm attachment. Once this level is reached, the wash pump (which has sensed the fill at 30 second intervals during the fill), becomes primed and pumps the water through the spray arm which will then rotate.
The water level is monitored by sensing the motor load through the electronics."


The solution is to turn your water supply valve part of the way on to limit the gpm flow to the drawer. This way, the drawer will not have over-filled in the 30 sec it took to sense the motor load. I have tried it and wow no more U3. Hope it makes sense and hope it works for you.
jim

Posted on Feb 09, 2009

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