Diagnostics & Troubleshooting; Diagnostics - Whirlpool 8178501A Manual

DIAGNOSTICS & TROUBLESHOOTING
Use the following procedure to enter the diag-
nostics mode:
1. Make sure that the unit is not in the "lock-
out" mode (the lockout LED will be off).
2. Press and hold the CUBED and LIGHT
buttons for about 3 seconds until the unit
beeps, then release both buttons.
3. Diagnostics will begin with step 0. NOTE:
Each step displays the step number in dig-
its 4 and 5 (see below) of the user interface
display, and the step result, using the first
three digits (1 - 3).
UI DISPLAY DIGITS
1 2
4. Each step must be manually advanced by
pressing the LOCKOUT button to move to
the next step in the sequence, or back up to
the previous step by pressing the FILTER
RESET button.

DIAGNOSTICS

3 4
5
5. All buttons and pads are inoperative, ex-
cept for those described in the actions for
each step.
6. The diagnostics charts shown on the fol-
lowing pages describe each component
that is tested.
7. If communication is lost with the dispenser
core control board, steps 10 - 14 will display
"- - -" on digits 1 - 3.
8. If communication is lost with the smart
valve control, steps 15 - 20 will display
"- - -" on digits 1 - 3.
9. The diagnostics mode ends automatically
after the steps are complete, or 20 minutes
have elapsed (whichever comes first). The
diagnostics mode may be manually exited
by pressing the LIGHT button during any
step, or in the case that electrical power is
cycled. Following the exit of the diagnos-
tics mode, the controls will resume normal
operation.
5-1