70291301
75
© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
Electronic Control Troubleshooting
41. Will Not Heat – Electric – Rotary Coin Drop (With and Without Time Delay
Board)
T077D
there voltage across
across terminals 1 &
6 of the temp
control board?
YES
NO
Is there voltage at
airflow switch N.C.
terminal to transformer
neutral?
NO
Adjust the airflow
switch or replace if
inoperative.
NO
YES
Is there voltage at
COM on switch B to
transformer neutral?
NO
Correct wiring
between airflow
switch and COM on
switch B.
Is there voltage from
N.C. on switch B to
transformer neutral?
Replace switch B.
YES
NO
YES
Is there voltage from
terminal 6 on CR2 to
transformer neutral?
Correct wiring
between terminal 6
on CR2 to terminal
N.C. on switch B.
NO
YES
Is there voltage from
terminal 4 on CR2 to
transformer neutral?
Replace CR2.
NO
YES
Correct wiring
between terminal
4 on CR2 &
terminal 1 on
temp control
board.
Is the thermistor
shorted or open?
NO
YES
Replace thermistor.
Replace the
temperature
control board.
YES
CONTINUED
ON NEXT
PAGE
Single and stacked
tumblers with and
without time delay.
Single and three phase
units.
Is the unit equipped
with a time delay
board?
NO
YES
Is there voltage
on terminal 3 of fan
motor to transformer
neutral?
With fan motor
running is there voltage
from terminal 5 to
transformer neutral?
Correct wiring
between terminal
3 of fan motor
and N.C. terminal
on switch B.
NO
YES
Replace fan motor.
Is there voltage on
terminal 1 of temp
board to transformer
neutral?
NO
YES
NO
YES
Correct wiring
between terminal
1 of temp board
to terminal 5
of fan motor.
Power supply to
temp control board
is good.
Replace selection
switch.
Is temperature
selection switch
shorted or open?
YES
NO
T077D
Is
there voltage across
across terminals 5 &
6 of the temp
control board?
Is