Alliance Laundry Systems CA050L - Unit Will Not Heat - Steam

82 70422101
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NetMaster Troubleshooting – KT075 Models Only
47.Unit Will Not Heat – Steam
Note: Tests are conducted with unit running
and calling for heat.
All voltage checks are referenced to
transformer neutral.
Correct wiring
between FS-2 and
N.O. of lint panel
switch.
Is there voltage at
FS-2 of control?
Is there voltage
at FS-1 of
control?
Correct wiring
between terminal 13
and N.O. of airflow
switch.
Is there voltage at
terminal 13 of the motor
control relay?
Check cabinet
limit for proper
operation. Replace
if necessary.
Is there voltage to the
output of the cabinet
limit?
Correct wiring
between steam valve
and cabinet limit
thermostat.
Is
there voltage
across the coil of
the steam
valve?
Check steam valve
for proper operation.
Replace if necessary.
Does steam
valve open?
No
Yes
Is the
thermistor
operational?
Replace
control.
Replace
thermistor.
Yes
NoNo
Yes
No
Yes
Replace motor
control relay.
Is there voltage at
terminal 14 of the motor
control relay?
No
Yes
No
Yes
Yes
Yes
No
No
Yes
Verify that the correct
steam is supplied to
unit. Verify that steam
valve and other items
were installed according
to the Installation Manual.
(1)
(2)
(5)
(6)
(10)
(11)
TMB2312S
Correct wiring
between airflow
switch and cabinet
limit.
Is there voltage to the
common of the airflow
switch?
Check for proper
operation of airflow
switch. Replace if
necessary.
Is there voltage to the
N.O. terminal of the
airflow switch?
Yes
No
No
Yes
(3)
(4)
Correct wiring
between motor
terminal 3 and
motor relay.
Is there voltage to
terminal 3 of the fan
motor centrifugal
switch?
Check motor for
proper operation.
Replace if
necessary.
Is there voltage at
terminal 5 of the fan
motor centrifugal
switch?
Correct wiring
between cabinet
limit and terminal 5
of fan motor.
Is there voltage to the
input of the cabinet
limit?
Yes
No
No
Yes
No
(7)
(8)
(9)
TMB2312S