The U1 error code on these early-model F-P DD602 dishdrawers means that you need to set the water pressure to be either HP (high pressure) or LP (low pressure). Here’s how to do that:
- Turn on the drawer and open it
- Press the PROGRAM CHANGING and ECO buttons at the same time, wait about five seconds and the screen will show HP or LP
- Press the START/PAUSE button and the setting will change, the sound pitch will also sound high or low
- Turn off and test
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