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e. Open main door. The dryer must stop and
ALL indicator dots of the microprocessor controller (computer)
light emitting diode (L.E.D.) display must go out. (Refer to the bottom illustration on the previous
page.)
f. Try to restart the dryer with the main door open.
g The microprocessor controller (computer) board's L.E.D. display must read “MAIN dOOR."
h Close the main door and restart the dryer.
i. Functional check of microprocessor controller (computer) board is complete.
2. Hot Surface Ignition (HSI) System
a. Upon completing installation of the replacement HSI module, reestablish power to the dryer.
b. The HSI module’s “red” indicator light will light up for approximately 5-seconds (self check routine).
If the HSI module’s “red” indicator light stays on or flashes continuously, then the HSI module is wired
incorrectly or has failed.
c. Start the drying cycle.
d. The Hot Surface Ignitor will turn on. After
approximately 4-seconds the hot surface
ignitor will shut off and the gas valve will be
energized. The flame should now be
established.
e. With the burner flame on, remove the flame
sensor wire from the S2 terminal of the HSI
module. The burner flame must shut off
immediately.
f. Stop the drying cycle, with the flame sensor wire still removed, restart the drying cycle.
g. The Hot Surface Ignitor will turn on and after approximately 4-seconds the hot surface ignitor will shut
off. The gas valve will be energized and a burner flame should be evident for approximately 7-
seconds and then shut off.
h. The HSI module will attempt two (2) additional ignition trials after which the HSI module will lockout
and the “red” indicator light will flash continuously.
i. Functional check of the HSI module is complete.
1) Replace the flame sensor wire from the S2 terminal to the HSI module.