American Dryer Corp. Gas/Electric/Steam ML-55HS - Manual (Page 49)

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Verify that the motor(s) heat and door indicator lights on the back side of the microprocessor controller
(computer) board are lit. (Refer to the illustration below.)
1. "FAN" (Blower) light emitting diode (L.E.D.) indicator
2. "FOR" (Forward) output L.E.D. indicator (for optional Reversing Models Only)
3. "Rev" (Reverse) output L.E.D. indicator (for optional Reversing Models Only)
4. "HT 1" (Heat) output L.E.D. indicator
5. "Fuse" (Main Fuse) input L.E.D. indicator
6. "Lint" (Lint Door) input L.E.D. indicator
7. "Main" (Main Door) input L.E.D. indicator
8. "Drum" (Basket [Tumbler] Hi-Limit) input L.E.D. indicator
9. "Sail" (Sail Switch) input L.E.D. indicator
10. "Burn" (Burner Hi-Limit) input L.E.D. indicator
11. "Flame" (Burner Control Failure) input L.E.D. indicator
12. "Power Supply" L.E.D. input indicator