18
American Dryer Corp.
450370 - 2
9. H
2
O – This L.E.D. will indicate the status of the water
pressure switch on the S.A.F.E. system water line. If water
pressure is present, then the L.E.D. is ON.
A. The display reads “Exhaust High Limit Fault”.
(Refer to page 20)
The temperature in the tumbler is above 190° F (88° C) or
follow Steps #1 through #3.
1. Check for voltage (24 VAC) at the computer on the J5
connector from pin 1 to ground. If no voltage is present,
either you have a poor connection at the J5 connector or
the computer board is faulty. If voltage (24 VAC) is present,
proceed to Step #2.
2. Check for voltage at the exhaust high limit thermostat. If
voltage is present at only one side the thermostat is open
and needs to be replaced. If voltage is present at both
sides, proceed to Step #3.
3. Check for voltage at the J5 connector pin 2 to ground. If
no voltage is present, check for a loose wire between the
J5 connector and thermostat. If voltage is present then
the computer board is bad and needs to be replaced.
B. The display reads “Burner High Limit Fault”.
(Refer to page 20)
1. Indicates the tumbler hi-limit has tripped.
2. Check for a block or restriction in the exhaust.
3. Make sure the exhaust is properly sized.
4. Make sure location has adequate make-up air.
5. Check for voltage (24 VAC) at the computer board J4
connector pin 3 red wire to ground. If no voltage (24 VAC),
check for a loose connection or change the computer
board. If voltage is present, proceed to Step #6.
6. Check for voltage at the burner high limit thermostat (the
sail switch must be closed at time of test). If voltage is
present at only one side the thermostat is open and needs
to be replaced. If voltage is present at both sides, proceed
to Step #7.
7. Check for voltage at the J4 connector pin 4 to ground. If
no voltage is present, check for a loose wire between the
J4 connector and thermostat. If voltage is present then
the computer board is bad and needs to be replaced.
C. The display reads “Bad Exhaust Temp Probe”.
(Refer to page 20)
1. Check for a loose connection or short between the
computer J3 connector pins 1 and 2, and the pin
connections 1 and 2 of P25 and J25 which lead to the
temperature sensor probe.
2. If connections are fine, next change the temperature
sensor probe.
3. If the display still reads “Bad Exhaust Temp Probe,” change
the computer board.
D. The display reads “Sail Switch Open Fault”.
(Refer to page 20)
1. The sail switch has opened while dryer is in the heating
mode. Is the blower motor running normally? If not
troubleshoot blower motor.
2. Check for block or restriction in the exhaust.
3. Make sure exhaust is sized properly.
4. Clean the lint screen.
5. Make sure all doors and access panels are closed and
sealed well.
E. The display reads “Sail Switch Closed Fault”.
(Refer to page 20)
1. Prior to start up, the sail switch is in the closed position.
Is the switch stuck, if so free up the mechanism and check
for moisture or broken components.
2. Check the sail switch and readjust accordingly.
3. Replace sail switch, if necessary.
F.
The display reads “Burner Ignition Control Fault”.
(Refer to page 20)
1. Check for 24 VAC at the DSI module across MV and GND
during the ignition process. If no voltage, replace the DSI
module. If voltage is present, check for 24 VAC at the
gas valve on terminals 1 and 2. If no voltage, check for a
loose connection on the wires going back to the DSI
module. If voltage is present, proceed to Step #2.
2. Check for voltage at J4 connector pin 6 during the ignition
process. If no voltage check for a loose connection
between the gas valve and computer connection at J4. If
voltage is present replace the computer board.
G. Tumbler will not rotate display reads “Rotation
Fault”. (Refer to page 20)
1. Does the tumbler turn? If so check the list below, If not
proceed to step two.
a. Rotational sensor is out of adjustment.
b. Rotational sensor magnet is missing or broke.
2. Check the list of items that will stop the tumbler from turning
below.
a. Belt is broke, loose, or slipping.
b. Check for 24 VAC at the computer board J8
connector pin 8 brown wire to GND. If no voltage is
present, check for a loose connection, if connection
is good, replace computer. If voltage is present,
proceed to next step.
c.
Check for 24 VAC on the motor contactor A1 and
A2. If no voltage, check for a loose connection in
the wire. If voltage is present, proceed to next step.
d. Check for proper voltage on the motor contactor CR2
at T3 to ground. If no voltage, replace motor
contactor. If voltage is present, proceed to next step.
e. Check for a loose connection to motor, if no loose
connection, replace motor.
