Alliance Laundry Systems CA050L - Unit Will Not Heat - Gas - QT and RQ Control Suffixes

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Hybrid Timer Control Troubleshooting
70.Unit Will Not Heat – Gas – QT and RQ Control Suffixes
Note: Tests are conducted with unit running
and calling for heat.
All voltage checks are referenced to
transformer neutral.
Correct wiring
between terminal 13
on motor control
and H4-1 on
hybrid control.
Is
there voltage
at terminal 13 of
motor co
ntrol
relay?
Replace motor
control relay
.
Is
there voltage
at terminal 14 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 moto
r.
Is
there voltage at
terminal 5 of fan
motor centrifugal
switch?
Correct wiring
between cabinet
limit and terminal 5
of fan motor
centrifugal switch.
Is there voltage to the
input side of the
cabinet limit?
Replace cabinet
limit.
Is
there voltage at output of
cabinet limit?
Correct wiring
between stove limit 1
and cabinet limit.
Is
there voltage to the
input side of the stove
limit?
NO
YES
YES
NO
YES
YES
NO
YES
NO
NO
NO
YES
YES
NO
YES
(3)
(4)
(5)
(6)
Is
there
voltage at
H4-1 of hybrid
control?
Yes
(1)
No
Is
the airflow
switch working
properly?
Replace
airflow
switch.
(2)
No
(7)
(8)
(9)
Replace the stove
limit.
Is
there voltage at output of
the stove limit?
YES
NO
(10)
(11
)
Correct wiring
between terminal 2
of ICM and stove
limit.
Is there voltage to
terminal 2 of
the Ignition Control
Module (ICM)?
NO
TMB2317S-a
TMB2317S-a