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1. Hot Surface Ignition (HSI) System
a. Upon completing installation of the replacement
Hot Surface Ignition (HSI) module, reestablish
power to the dryer.
b. Start the drying cycle.
c. 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.
d. The green indicator will light then 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 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.
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 68].)
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 dryer.
i. Functional check of microprocessor (computer) board is complete.