How do I winterize a Fisher Paykel single drawer dish washer?

SOURCE: fisher and paykel dish drawer

U1= Machine has failed to prime with water within
approx. 3 minutes
 The water supply is not turned on
 The machine is syphoning
 The spray arm is not in place
 Excessive foaming
 The Inlet Valve has failed
 The electronic controller has failed
 Rotor not fitted correctly

SOURCE: FISHER PAYKEL DISH DRAWER U3

LP is a setting for Low pressure. To reset your pressure to HP, hold the Programme and Eco touch switches simultaneously for 5 seconds. Once the setup mode is entered a beep is emitted and
the LCD is red with ‘HP’ or 'LP' displayed. Push the Start/Pause button to alternate between HP and LP. and push the power button to exit.

SOURCE: u3 code on fisher paykel dishdrawer how to reset?

This site tells you how to reset:
http://applianceguru.com/forum1/163.html

I have the same issue and will try this tonight to see if it helps.

SOURCE: fisher and paykel leak

most likely the actuators are bad. with the unit off push and hold the lock and start buttons, lock first then start, after about 6 seconds the display will flash 188. press the power button, ho will be displayed. push the start button until Ld is displayed. open the drawer in question and push the lock button and watch the lid both sides should go down evenly, push the lock key to move it up and down as needed. push the power button to exit diagnostics. if you notice that the lid doesn't go down evenly or if one side stays up replace the actuators, they come as a pair. call a dealer/servicer to order actuators. make sure to specify top or bottom as there is a difference. hope this helps

SOURCE: I have a Fisher Paykel dishwasher with water in top drawer

You need a Air gap kit designed by Fisher and Paykel to address this problem. It is pricey but it is worthy. I used this and very happy with it since no back flow problem from one while other running. Here is a link to order it.http://www.fisherpaykelparts.net/product/WT50/WT50-Dual-Air-Gap-Kit/