Electronic Controls; Critical Errors - Haier GE CDT800P2N3S1 Technical Service Manual

https://appliancetechmanuals.com
The main control board is located under the dishwasher. It is supplied 120 VAC from the consumer's
home. Outputs include 120 VAC to the heating element, wash and drain motors. The control also
supplies 13.5 VDC to the fill system, door switches, turbidity sensor (some models), the user interface
(UI) board and detergent module in the door. The user interface (UI) contains the logic for door fan and
detergent dispenser. The main control board will contain the rest of the logic for the dishwasher.

Critical Errors

Critical errors will turn a cycle off and show a display alerting the consumer of a fault which will not
allow the dishwasher to function or cause an undesirable condition.
No Water Detected
In the event the internal water level does not change, the cycle will be canceled; and the user interface
(UI) will display the following:
• Models with Seven Segment Display (SSD) Screens: H20 will be displayed on the SSD screen.
• Models without Seven Segment Display (SSD) Screens: Wash Temp LED will blink continuously.
The water may be turned off. The consumer is directed to verify the water supply line is connected
properly, the supply line valve is turned on, and restart the cycle. If this fails, the consumer is directed
to call for service.
Pressure Sensor Errors
In the event that the pressure sensor signal is undetectable or irrational, the cycle will be canceled, and
the user interface (UI) will display the following:
• Models with Seven Segment Display (SSD): PrS or PrF will be displayed.
• Models without Seven Segment Display (SSD): Dry LED or Wash Temp+Dry LED's will blink.
The control does not see a change in pressure during fill. Verify pressure sensor harness, then replace
pressure sensor if needed.
Continuous Fill Error
In the event consecutive signals from the pressure sensor detect high water level, the drain pump will
run, and the user interface (UI) will display the following:
• Models with Seven Segment Display (SSD) Screens: CFE will be displayed on the SSD screen.
• Models without Seven Segment Display (SSD) Screens: Cycle Indication LED's will blink
continuously.
The consumer is directed to turn off the water supply. Diagnose reasons for water valve not shutting off.

Electronic Controls

– 43 –