Alliance Laundry Systems CA050L - “Door Open” Indicator

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Quantum Control Troubleshooting
76.“Door Open” Indicator
“Door Open”
Indicator
TMB2271S
Note: All voltages
are to be measured
to transformer
common, unless
otherwise stated.
Correct wiring from terminal
block to transformer. Verify
that unit is connected to
power and the power is on.
No
Yes
Is the
primary fuse
good?
Replace the
primary fuse.
No
(1)
Is
line voltage
present across the
black and lt blue wires
on the primary side of
the transformer?
Replace
transformer.
No
Yes
(2)
Yes
Correct wiring
between the
transformer and
the fuse.
Is there
24 volts across
terminals 2 and 3
of the transformer
secondary?
No
(3)
Is
there 24 volts
to the input side
of the secondary
fuse?
Yes
Check fuse.
Replace if
necessary.
No
No
(4)
Is
there 24 volts
to the output side of
the secondary
fuse?
Yes
Correct the wiring
between the fuse
and the common
terminal of the
door switch.
(5)
Is
there 24 volts
to the common
terminal of the door
switch?
Check door switch
for proper operation.
Replace if
necessary.
(6)
No
Yes
Is
there 24 volts
at the normally open
terminal of the door
switch with the door
closed?
Yes
Correct the wiring
between the door
switch and the lint
panel switch.
No
(7)
Is
there 24 volts
to the common
terminal of the
lint panel
switch?
Yes
Replace the lint
panel switch.
No
(8)
Is
there 24 volts
to the contact on
the lint panel
switch?
No
Correct the wiring
between the N.O.
terminal on the lint
panel switch to
terminal H2-1 on
the control.
Yes
(9)
Is there
24 volts across
terminals H5-7 and
H5-4 on the
control?
Replace
control.
Yes
(10)
TMB2271S