The bottom drawer is in locked mode and can not start a new cycle

Check out www.ApplianceRepairLesson.com. I hope this is what you needed, and it works for you. Good luck!

There is a sequence of button presses explained here Fisher Paykel Dishwasher Servicing Fisher Paykel Dish Drawer Repair

You can try to reset by unpluging if you have not already. The problem seems as if its the bot actuators even if it was a flood issue you could still pull open the drawers . Now i am pulling this from memory of the few i have serviced in the field so forgive if i am wrong . try holding the start and cancel button at the same time for a few seconds and this will get you into *** mode. then hit the start button this should start a fast cycle. If you can get the bottom drawer open you can get to the tech sheet in the back and trouble shoot from there. good luck

The Ever- So- Helpful Diagnostics Mode -----
Getting into the Diagnostics Mode:
Press the LOCK and START / PAUSE buttons simultaneously and hold for 5 seconds.
The unit will beep once
Press the POWER button once, and you are now in diagnostics mode.
Pressing the START / PAUSE button sequentially advances the machine through the various functions you will want to test.
Start and stop each function by pressing the LOCK button.
A strong word or caution: DO NOT ENERGISE THE HEATER PLATE function (ER) without water in the tub or the heater will burn out.
The tech sheet containing all fault codes, test values, and a schematic is located behind the lower drawer at the back wall.
Exit diagnostics by pressing power off.

Q: F1 ERROR. The unit is beeping, both drawers are flashing F1 and won't stop running.
A: Your appliance has experienced the ubiquitous F1 flood error. The only way to stop the beeping is to remove power. Your course of action depends on the next step. You need to look BEHIND the lower unit drawer. Remove power, then open the lower drawer all the way, and press those plastic tabs (down at the sides, along the bottom and just below the round buttons)- inwards. Now slide the drawer out a couple inches more. You can now see behind the drawer.
Is there water in the catch pan? If no, the Mains Filter Board beneath that plastic cover in the back is bad. It thinks it's flooded while in fact it is not. Replace it. (PN 525959P) It is also remotely possible that one of the wiring harness is faulty.
If there IS water back there, you need to find where it's coming from. Usually, the fill (PN 526836) and drain hoses (PN 527137) are NOT at fault. Go into Diagnostics Mode, and operate the water fill valve (FV), and look for leaks at the valve and along the fill hose as the tub fills.
(You'll want to remove that large plastic cover in the back to see the valves and hoses coming from them. Lift the drawer off its rails and set it off to the left if there's space for it. Upper drawer, set it on top of the bottom drawer).
Operate the drain pump (P2) and look for leaks in the drain line. If no water is seen leaking from those sources, go on to the Lid Motors and the Link Supports.
First inspect the link support (that white plastic rod that spans the tub service lines). They typically snap in two at the mid span point. If it's snapped, there's your problem. Replace it with the updated link support. (PN 528437) Also run the Lid Motors (LD). As they transition up and down, do they respond strongly, or do they sound weak and labored? If the motors are in a white plastic case, you have the old motors and they will need replacing soon anyway. When they grow weak their ability to pull the seal down strongly is diminished (PN's 528112 Top, and 528113 Bottom)
Should you get an F1 error code on the TOP UNIT ONLY, it means that the LOWER UNIT has experienced some failure in the Water Heating Circuit. You will need to test those components to detect what has failed. Get out the trusty schematic and your multimeter!

The drawer door seal is locked in. This could be either because the controller has lost power or the seal actuator motor is faulty.

You will have to force open the drawer before you can do anything. (Turn off the mains power when you work on the dishwasher)

Let me know if you can handle electric/ mechanical repairs so that I can guide you further. Otherwise you should call a technician. If you are getting beeps then most likely the door seal system is the problem.
Are you able to use the top drawer?

Let's go to diagnostic test mode to see if you can retrieve the the actuator hence the tube out.
1- Press Lock button and start/pause key until the display showing up.
2- Press Power to show HO.
3- Press start button to advance the display until you see P2 for draining, if you pass, keep doing it to get it back in a loop.
4- When at P2, press lock to turn on, press a again to turn off.
5- Listen to the sound of the pump. If you hear nothing that means the pump is dead or stuck.
6- The Motor has 2 directions: one for, Rinse and one for Drain. When you done with the diagnostic, press the power button to get out of the mode.
7- If this is the case, unplug the power then remove the rack, the bottom stanless steel plate with holes then take out the rotor to clean up. It is a good design the stator is outside of the tube, so you don't have to worry too much about the complication.
8- Make a note of all the positions so you can put them back the same as they were. Good luck

Have you tried pulling out the motor rotor and checking for anything stuck under it? try swapping it with the other drawer. If it still won't go you need to swap over the motor controllers between the two drawers if the fault moves you need a new Motor controller module. Cheers

fisher and paykel sent me a solution - turn off at wall and unplug then turn back on. The dishwasher reset itself and the drawer unlocked.

F1 is a flood code meaning excessive amounts of water have collected on the bottom catch basin.
If a flood condition is detected, both draws will activate the drain motors and flash F1.
Remove the bottom drawer by pulling the lock pins on each lower side corner. Slide down and remove front cover. Release the drawer slide clips and remove drawer then dry the catch basin.
There are three possible scenarios for this error code;
1. Defective lid motor(s)...Each drawer has two lid motors, attached to the cabinet on either side of the drawer, that pull the lid tight to the drawer when the cycle is started. (this was very common on early models)
2. Something too tall was placed in the drawer preventing the lid from closing completely.
3. (only seen this once) the drain hose developed a crack causing water to leak only when draining.

poss water valve b4 i would consider a control