American Dryer Corp. AD-75 User Manual

Page 52

e. Open main door. The dryer must stop and ALL indicator lights on the back side of the

microprocessor (computer) board must go out. (Refer to illustration on the previous page

[page 46].)

f. Try to restart the dryer with the main door open.

g. The microprocessor (computer) board's L.E.D. display must read DOOR."

h. Close the main door and restart the dryer.

i. Functional check of microprocessor (computer) board is complete.

2. Direct Spark Ignition (DSI) System

a. Upon completing installation of the replacement

Direct Spark Ignition (DSI) module, reestablish

power to the dryer.

b. Starting the drying cycle.

c. The ignition (DSI) module's L.E.D. indicator will

light "red" for up to approximately 1.5 seconds

(pre-perge time).

d. The module's indicator light will then turn

"green." The gas valve will be energized and

the ignitor probe will spark for approximately 8

seconds. The burner flame should now be

established.

e. With the burner flame on, remove the flame

sensor wire from the FS terminal of the DSI

module.

f. The burner flame must shut off and the ignition module must lock out with the DSI module's

indicator light "red."

g. Stop the drying cycle, with the flame sensor wire still removed, restart the drying cycle.

h. The ignition module must proceed through the pre-purge, with the indicator light "red," the

ignition trial time of approximately 8 seconds, with the indicator light "green," and then proceed to

lock out with the indicator light "red."

i. Functional check of the Direct Spark Ignition (DSI) Module is complete.

1) Replace the flame sensor wire from the FS terminal to the DSI module.