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50
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 previous page [page 49].)
f. Try to restart the dryer with the main door open.
g. The microprocessor (computer) board's L.E.D. (light emitting diode) display must read "MAIN dOOR."
h. Close the main door and restart the dryer.
i. Functional check of microprocessor (computer) board is complete.
2. Hot Surface Ignition (HSI) System
a. Upon completing installation of the replacement Hot
Surface Ignition (HSI) module, reestablish power to
the dryer.
b. The HSI module's "red" indicator light will light for
up to 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, and a few seconds later the gas valve will be energized. After
approximately 4-seconds the hot surface ignitor will shut off. Ignition (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 a few seconds later the gas valve will be energized and the
Hot Surface Ignitor will shut off. Ignition (flame) should be evident for approximately 7-seconds and then
shut off.
h. The HSI (Hot Surface Ignition) module will attempt two (2) additional ignition trials after which the HSI
module will lock out and the "red" indicator light will flash continuously.
i. Functional check of the Hot Surface Ignition (HSI) Module is complete.
1) Replace the flame sensor wire from the S2 terminal to the HSI module.