Fisher & Paykel DishDrawer DD605 Service Manual page 37

F9 Power Supply/Controller Fault
Power supply/controller fault.
The product will disable power supply, log the fault, lock out the user and report to the user.
Note: The isolation relay will be disabled. Power to the product will need to be disconnected then reconnected for it to
become fully functional again.
PRIMARY ACTION
- Check the previous fault, and if it was F3, F8 or F9, then this F9 is a consequential fault - fix the previous fault.
- If the fault occurred immediately after power on, check the solenoid coils and motor stator windings for damage,
overheating and correct resistances.
- Check the lid actuators are properly connected.
- Check the controller for damage, signs of overheating or fluid leaking.
SECONDARY ACTION
Important - Check the solenoid coils and motor winding resistances are OK before replacing a controller.
- If the fault is on the top controller and the bottom controller works, check the top controller chassis and power
harnesses are properly connected, are not damaged and no wires are loose (controller may not be receiving
power from bottom tub).
- If OK, replace the top controller.
- If the fault is on the top controller and the bottom controller does not work, check the chassis connector on the
bottom controller is properly fitted and the harness is not damaged. Check the connectors on PCB mains filter is
properly fitted.
- Check the heater plate harnesses are properly connected/undamaged.
- If still not OK, replace the bottom controller.
TERTIARY ACTION
- If a single product, and harnesses and resistances are OK, replace the controller. If replacing the controller does
not fix the fault, replace the PCB mains filter.
FF Top Tub Not Responding
Top tub not responding.
PRIMARY ACTION
- Check the top controller works when swapped with the bottom controller and vice versa. Replace the top
controller if it does not work in the bottom tub.
SECONDARY ACTION
- Check the chassis harnesses and connectors if the top controller works in the bottom tub and the bottom controller
does not work in the top tub.
TERTIARY ACTION
- Replace PCB mains filter.
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