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3. Failed arc suppressor (A.S.) board (for Reversing Models ONLY).
4. Failed microprocessor controller (computer).
5. Failed 24 VAC transformer.
H. Both drive motor and blower motor run a few minutes and then stop, microprocessor controller
(computer) display continues to read time or percent of extraction and all indicator dots are off
1. Fault in main door switch circuit
a. Failed main door switch.
b. Main door switch out of adjustment.
c. Loose connection in door switch circuit.
I. Microprocessor (computer) display reads "dSFL"
1. Fault in microprocessor heat sensing circuit
a. Failed microprocessor temperature sensor.
b. Failed microprocessor controller (computer).
c. Broken wire or connection somewhere between the microprocessor controller (computer) and the
microprocessor temperature sensor.
J. Microprocessor controller (computer) display reads "door"
1. Fault (open circuit) in door switch circuit
a. Failed main door switch.
b. Broken connection or wire in main door circuit.
2. Failed 24 VAC transformer.
K. Microprocessor controller (computer) will not accept any keyboard entries, i.e., L.E.D. (light
emitting diode) display reads "FILL" and when keyboard entries are selected, the L.E.D.
display continues to read "FILL"
1. Failed keyboard label (touch pad) assembly.
2. Failed microprocessor controller (computer).
L. Microprocessor controller will only accept certain keyboard entries
1. Failed keyboard label (touch pad) assembly.
2. Failed microprocessor controller (computer).