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70291301
© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
Electronic Control Troubleshooting
34. Will Not Run – Electric – Rotary Coin Drop
T072D
Single and Stack with and without
time delay. Single and three phase power.
Is there voltage across
terminals 2A & 1A
of push to start
switch?
YES
NO
Replace push to
start switch.
Is there voltage across
COM and N.O. of
the airflow switch?
YES
Replace inoperative
switch or correct
airflow vane
operation.
NOTE: The N.O. contact is closed in the rest
position due to the physical mounting
of the switch.
NO
Is the unit equipped
with a time delay
board?
NO
YES
Is there voltage across
DOB contacts on
TMR2?
Replace time
delay board.
YES
NO
Is there voltage across
terminals H1-4 &
H1-8 on TMR2?
YES
NO
Is there voltage across
terminals 5 & 3 on
the CR2 relay?
Replace CR2
relay.
YES
Is there voltage across
terminals 7 & 8 of
CR2 relay?
NO
Correct wiring
between CR2
relay and
airflow switch.
NO
YES
Is there voltage across
the coil of the motor
control relay?
Correct wiring
between motor
control relay
and airflow
switch.
NO
**
**
**
Check for proper
operation of
airflow switch and
check wiring.
**
Is there voltage across
terminal 7 & 4 of the
motor control relay?
Replace motor
control relay.
YES
NO
**
**
** Tested with the start switch pressed in.
YES
Is there voltage at
terminal 5 on the
motor control relay?
Correct wiring
between
terminal 5
and supply
voltage.
NO
YES
**
** Tested with vend price
satisfied and with start
switch pressed in.
**
Is there voltage to
COM of the airflow
switch?
Correct wiring
between COM of
airflow switch and
1A on start switch.
YES
NO
Note: Reference
voltage to transformer
neutral.
Is unit single
phase or three
phase?
Single phase
Continued on
next page
COLUMN 2.
Continued on next
page COLUMN 1.
Three phase
Refer to note.
T072D