Maytag Built-in Refrigeration, Manual

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77
CZT TEST MODE
To perform the built-in diagnostics that test the CZT module, both door switches must be
closed. Tape the fresh food compartment door switch closed. With the door switches
closed, the CZT display should be blank.
To enter the CZT test module, press and hold the Citrus and Produce keypads for five
seconds.
The LCD should display –88 and be illuminated.
All keypads should be illuminated.
The fan should be off.
The damper should close
Wait seven seconds,
Touch the Citrus Keypad
The fan will begin turning.
If the controller does not sense fan rotation, an F will be displayed.
The heater will energize.
If the control does not sense heater continuity, an H will be displayed.
The damper will open.
The display should be blank yet illuminated unless indicating an F or H.
The Citrus keypad should be illuminated.
Wait seven seconds
Touch the Produce keypad
The control will test the thermistor circuit.
If the circuit is open, OC will show in the display.
If shorted, CC will show in the display.
The display should be blank yet illuminated unless indicating OC or CC.
The produce keypad should be illuminated.
Touch the Meat Keypad. (Not applicable to upper CZT)
The meat keypad will illuminate
Touch the Normal keypad
This will exit the diagnostic mode
The diagnostic mode will terminate if the refrigerator door switch is opened or if
five minutes passes with no activity.