Alliance Laundry Systems CA050L - Door Open Indicator

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Micro Display Control (MDC) Troubleshooting
35.Door Open Indicator
TMB2348S
Is there voltage at
H2-1 on the Electronic
control?
Replace Control.
Is there power supplied
to the unit?
NO
Plug unit in and
start cycle.
Is there 24
VAC at
the input of the
secondary fuse?
Is there 24 V
AC at
output side of
secondary fuse?
Correct wiring
between secondary
fuse and
transformer.
Replace secondary
fuse.
NO
NO
YES
YES
YES
YES
Is there 24
VAC at
N.O. of door
switch?
Is there 24 V
AC at
N.O. of lint drawer
switch?
Check for proper
operation replace if
necessar
y
.
Correct wiring
between N.O. on lint
drawer and COM on
door switch.
Correct wiring
between N.O. and
output of secondary
fuse.
Check for pro
per
function of door
switch replace if
necessar
y
.
Correct wiring
between H2-1 of
electronic control
and COM of lint
drawer switch.
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
Reference voltage
checks to transformer
neutral.
(1)
(2)
(3)
(4)
(5)
(6)
(7)
Is there 24 V
AC at
COM of lint drawer
switch with lint
panel closed?
With door closed is
there 24 V
AC to
COM of door
switch?
Gas, steam and electric heat.
Single and three phase power supply.
TMB2348S