Fisher & Paykel DishDrawer DD24D Series Service Manual page 39

U1 ("No Tap" symbol) - Wash pump has not primed.
The fill valve has been open for more than 180 seconds and the wash pump has not primed.
The product will pause the wash program, log the fault, report to the user, and restart when the
start/pause button is pressed.
PRIMARY ACTION
No water in the tub:
• Check that the tap is turned on.
• Check for kinked inlet hose, blocked inlet hose filter.
• Check harness connections to water inlet valve.
• Check for a blocked pipe interrupter in the water softener (if fitted).
Not enough water in the tub:
• Is the water pressure sufficient (above 30kPa or 4.3psi)?
Too much water in the tub:
• Is the spray arm correctly fitted?
• Is the spray arm flapper shutting off?
• Is the rotor correctly fitted?
• Check for foaming - spilled rinse aid or wrong detergent (liquid detergent, or tablets).
SECONDARY ACTION
• Check the rotor wash (top) impellor is not loose on the shaft.
• Check the fill valve operation (using diagnostics).
• Check the motor operation (using diagnostics).
U3 Filled too quickly or failed to drain
This fault is not displayed to the customer, but it is recorded in the fault history and can be seen
by Smart Tool.
If the motor senses prime too soon (in less than 20 seconds), it will drain and refill up to 5 times,
then continue the wash program regardless, and log the fault.
PRIMARY ACTION
• Not draining completely from previous fill, test in diagnostics.
• Check for:
• A blocked drain or kinked drain hoses.
• Blocked drain sump inlet / outlet pipes.
• Blocked drain filter.
• Faulty rotor.
• Faulty connection to the motor.
• Faulty hall sensor.
SECONDARY ACTION
Filling too quickly. Check for:
• Excess water pressure.
• Faulty water inlet valve.
U4 This fault is advisory only. The other tub has a fault and has disabled
the power supply.
This fault is advisory only. The other tub has disabled the power supply.
PRIMARY ACTION
• Diagnose and repair the fault displayed on the other tub.
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599735A