70380601
93
© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
On Premise Micro Control (OM) Troubleshooting
37. Unit Will Not Heat – Steam
Unit Will Not
Heat – Steam
Is there
voltage at H2-5
of control?
Is there
voltage on BRN
wire on motor
contactor?
Yes
Replace
thermistor.
Correct wiring
between H2-5 and
motor contactor.
No
TMB2284S-a
Yes
All voltage checks are referenced
to transformer neutral.
(1)
Note: Tests are conducted with
unit running and calling for heat.
Is the
thermistor
operational?
No
Replace
control.
(5)
Replace motor
contactor.
No
Yes
Yes
No
Continued on
next page
Is there
voltage to the
N.O. terminal
of the airflow
switch?
No
Correct wiring
between airflow
switch and
cabinet limit.
Is there
voltage to the
common of the
airflow
switch?
(2)
(3)
(4)
Check for proper
operation of
airflow switch.
Replace if
necessary.
Yes
No
Yes
No
Yes
Yes
(7)
(6)
Yes
(8)
Correct wiring
between cabinet
limit and terminal
5 of fan motor.
No
Yes
No
(9)
Is
there
voltage at ORG/WHT
wire on motor
contactor?
Is there
voltage to terminal 3
of the motor
contactor?
Correct wiring
between motor
terminal 3 and
motor contactor.
Is there
voltage at terminal
5 of the fan
motor?
Check motor for
proper operation.
Replace if
necessary.
No
Is
there
voltage to the
input of the
cabinet
limit?
Is
there
voltage to the
output of the
cabinet
limit?
Check cabinet
limit for proper
operation.
Replace
if necessary.
Summary of Contents for YT035E
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