Service manual

70380601 71
© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
NetMaster Troubleshooting
30.Unit Will Not Heat – Gas
Note: Tests are conducted with u
nit running
and calling for heat.
All voltage checks are referenced to
transformer neutral.
Correct wiring
between FS-2 and
COM of lint panel.
Is there voltage at
FS-2 of the control?
Is there voltage
at FS-1 of the
control?
Correct wiring
between COM of
airflow switch and
FS-1 of the
control.
Is there voltage at COM
of airflow switch?
Check for proper
function of airflow
switch and replace if
necessary.
Is there voltage across
COM & N.O. terminal
of airflow switch?
Correct wiring
between terminal 7
on motor control
rel
ay and N.O.
terminal on airflo
w
switch.
Is there voltage at
te
r
minal 7 of motor
control relay?
Replace motor
control relay.
Is there voltage across
terminals 7 & 4 of
motor control relay?
Correct wiring
between terminal 3
of fan motor
centrifugal switch
and terminal 4 of
motor control relay.
Is there voltage at
terminal 3 of fan
motor centrifugal
switch?
Replace fan motor.
Is there voltage across
te
rminals 3 & 5 of fan motor
centrifugal switch?
Correct wiring
between cabinet
limit and terminal 5
of fan motor
cent
rifugal switch.
Is there voltage to the
input side of the
cabinet limit?
Replace cabinet
limit.
Is there voltage across
cabinet limit?
Correct wiring
bet
ween stove limit 1
and cabinet limit.
Is there voltage to
the input side of
stove limit 1?
NO
YES
Is the
thermistor
operational?
Replace the
control.
Replace
thermistor.
YES
NO NO
YES
NO
YES
YES
NO
NO
YES
YES
NO
NO
YES
YES
NO
NO
YES
YES
NO
NO
YES
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
(11)
TMB2231S