Alliance Laundry Systems CA050L - Unit Will Not Heat - Electric

84 70422101
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NetMaster Troubleshooting – KT075 Models Only
48.Unit Will Not Heat – Electric
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 stove limit
and normally open
terminal of the
airflow switch.
Is there voltage to the
input of the stove limit?
Check operation of
stove limit. Replace
if necessary.
Is there voltage to the
output side of the stove
limit?
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
Continued on next
page.
(1)
(2)
(5)
(6)
(10)
(11)
(12)
TMB2335S-a
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?
Check motor for
proper operation.
Replace if
necessary.
Is
there voltage at
terminal 5 of the fan
motor?
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)
TMB2335S-a