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48
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
page 46.)
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
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 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.