ADC AD-78 - Manual (Page 55)

O. Microprocessor controller (computer) locks up and L.E.D. (light emitting diode) display reads
erroneous message(s) or only partial segments...
1. Transient power voltage spikes...disconnect the electrical power to the dryer, wait one (1) minute and
reestablish power to the dryer. If problem is still evident ...
a. Failed microjprocessor controller (computer).
b. Failed keyboard label (touchpad) assembly.
P. Dryer stops during a cycle, microprocessor controller (computer) buzzer (tone) sounds for
5 seconds, and then the L.E.D. display reads “dSFL” for approximately 30 seconds, and then
returns to “FILL”...
1. Loose connection somewhere between the microprocessor controller (computer) and the microprocessor
temperature sensor.
2. Loose "dSFL" 1/8-amp fuse on the microprocessor controller (computer).
Q. Dryer stops during a cycle, microprocessor controller (computer) buzzer (tone) sounds for
5 seconds, and then the L.E.D. returns to “FILL”...
1. Loose connection somewhere in the main power circuit to the microprocessor controller (computer).
2. Failed arc suppressor (A.S.) board.
R. Microprocessor controller (computer) L.E.D. display reads “SEFL”...
1. Rotational sensor circuit failure...fault somewhere in the tumbler (basket) rotation or circuit ...
a. Thmbler (basket) not rotating ...
1) Broken or loose V-belts.
2) Failure in drive motor circuit...refer to Section B, Section C, and Section D on page 47.
b. Failed rotational sensor.
c. Broken wire or connection between rotation sensor and microprocessor controller (computer).
S. Microprocessor controller (computer) L.E.D. display reads “Hot”...
1. Possible overheating condition...microprocessor controller (computer) has sensed a temperature which
has exceeded 220° F.
“Hot” display will not clear until temperature sensed has dropped to 220° F or lower and the micro­
processor controller (computer) is manually reset by pressing the “CLEAR/STOP” key.
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