American Dryer Corp. AD-27 - Manual (Page 42)

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2. Microprocessor controller (computer) program (Key 2) is set incorrectly in the active mode (“SEn”) where
the dryer is not equipped with the OPTIONAL rotational sensor ... program should be set as “nSEN.”
M. Microprocessor controller (computer) light emitting diode (L.E.D.) display reads “Hot”...
1. Possible overheating condition ... microprocessor controller (computer) has sensed a temperature, which
has exceeded 220º F (104º C).
“Hot” display will not clear until temperature sensed has dropped to 220º F (104º C) or lower and the
microprocessor controller (computer) is manually reset by pressing the “CLEAR/STOP” key.
N. Heating unit is not operating (no heat) ... no voltage at heating unit (i.e., gas models - Direct
Spark Ignition [DSI] module, electric model - electric oven contactor) when dryer is first started
and both the heat indicator dot and the “HEAT” output L.E.D. are on...
GAS MODELS
1. Fault in sail switch circuit ...
a. Sail switch is out of adjustment or has failed.
b. Sail switch damper is not closing or is fluttering ...
1) Lint screen is dirty.
2) Restriction in exhaust ductwork.
3) No exhaust airflow ...
a) Failed impellor (fan/blower).
b) Fault in impellor (fan/blower) motor circuit.
2. Tripped burner manual reset hi-limit switch.
3. Tripped lint chamber sensor bracket basket (tumbler) manual reset hi-limit switch.
O. Heating unit is not operating (no heat) ... no voltage at heating unit (i.e., gas model - DSI
module, electric model - electric oven contactor) when dryer is first started and the microprocessor
controller (computer) heat indicator dot is on but the “HEAT” relay output L.E.D. is not on...
1. Failed microprocessor controller (computer).
P. No heat ... voltage is confirmed at heating unit (i.e., gas models - DSI module)...
GAS MODELS
1. Fault in DSI system ...