Fisher & Paykel DishDrawer DD24D Series Service Manual page 38

599735A
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.
Once powered up, wait 30 seconds before trying to enter diagnostics, as product will be doing a
self check.
PRIMARY ACTION
• Check the previous fault in diagnostics, and if it was F3, F8, then this F9 is a consequential
fault - fix the previous fault.
• Check dropper resistor on the heater plate that it is intact, measure between pins 4-5 on the
"POWER" connector (P101) replace heater plate if open circuit. plate (refer to Section 8.18).
• Check wiring harness connections at controller, check harness isn't too short and has pulled
contact away from P205 or P101 connector on controller (refer to Section 8.1).
• Check the lid actuators resistance and that they are properly connected (refer to Section
8.1).
• Check the controller for damage, signs of overheating or fluid leaking.
• Check the drying fan - Polarity sensitive, meter +ve to red wire, -ve to black wire, (around 2-
3 MΩ). Check fan torque by running in diagnostics and check fan torque by trying to stop
with your finger, fan normally draws 120 mA, if faulty can draw up to 160 mA, If able to stop
fan easily with no torque from fan, and fan will not restart, replace fan assembly and fit new
controller, as a faulty fan will have damaged the controller.
• If the fault occurred immediately after power on and you are unable to enter the diagnostics
after the 30 second time frame, check all solenoid coils, lid actuators, heater plate, motor
stator windings for damage, overheating and correct resistances.
resistance, which will only show a dead short (a damaged fan may show correct resistance)
for 120V products the fan may give off a burnt smell if faulty. Replace controller but leave
fan connector unplugged, power product back on and check all components, if everything
operates correctly and no F9 fault is showing, could be a possible fan related fault, replace
fan assembly.
• Check the PCB mains filter for dry joints
• If all components, coils, heater plate and fan are OK, only then replace the controller.
SECONDARY ACTION
Important Check that the solenoid coils, fan 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.
replacing the controller does not fix the fault, replace the PCB mains filter.
38
Check drying fan
If