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

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Hybrid Timer Control Troubleshooting
71.Unit Will Not Heat – Electric – QT and RQ Control Suffixes
Is
there
voltage at output
side of cabinet
limit?
Unit Will Not Heat –
Electric – QT and
RQ Control Suffixes
Is
there
voltage at
H4-1 of hybrid
control?
Is
there
voltage at
terminal 14 of
motor control
relay?
Is there
voltage at terminal
3 of fan motor
centrifugal
switch?
Is
there
voltage at
terminal 5 of fan
motor centrifugal
switch?
Is there
voltage to the
input side of the
cabinet limit?
Yes
Replace fan
motor.
Yes
Correct wiring
between
cabinet limit
and terminal 5
of fan motor
centrifugal
switch.
Is there
voltage at terminal
13 of motor motor
control relay?
Replace motor
control relay.
Correct wiring
between
terminal 3 of fan
motor centrifugal
switch and
terminal 14 of
motor control
relay.
Yes
Yes
No
No
No
Yes
No
Is there
voltage to the
input side of the
stove limit?
Correct wiring
between stove
limit and cabinet
limit.
No
continued on
next page
TMB2318S-a
(1)
(3)
(4)
(5)
(6)
(7)
(8)
Yes
Yes
Replace
cabinet limit.
No
(9)
Note: Tests are conducted
with unit running and
calling for heat.
Is
there
voltage at output
side of the stove
limit?
Replace the
stove limit.
(10)
All voltage checks are referenced
to transformer neutral.
Yes
No
Yes
No
Correct wiring
between
terminal 13 on
motor control
relay and hybrid
control.
No
Is
the airflow
switch working
properly?
Replace
airflow
switch.
(2)
No
TMB2318S-a