98 70291301
© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
Micro Display Control Troubleshooting
52.Door Open Indicator
Is there voltage at
H2-1 on the Electronic
control?
Replace Control.
Is there power supplied
to the unit?
NO
Is there 120 VAC at input
of primary fuses?
Is there 120 VAC at
output side of the
primary fuses?
Is there 120 VAC across
terminals 1 & 2 of
transformer primary?
Plug unit in and
start cycle.
Correct wiring
between primary
fuses and power
supply.
Replace primary
fuse(s).
Correct wiring
between primary
fuses and
transformer.
Replace
transformer.
Is there 24 VAC at
the input of the
secondary fuse?
Is there 24 VAC at
output side of
secondary fuse?
Correct wiring
between secondary
fuse and
transformer.
Replace secondary
fuse.
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
YES
Is there 24 VAC at
N.O. of door
switch?
Is there 24 VAC at
N.O. of lint drawer
switch?
Check for proper
operation replace if
necessary.
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 proper
function of door
switch replace if
necessary.
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)
(8)
(9)
(10)
(11)
TMB250S
Is there 24
V
AC across
terminals 2 & 3
of
transformer
secondary?
Is there 24
V
AC at
COM of lint drawer
switch with lint
panel closed?
With door closed is
there 24 VAC to
COM of door
switch?
Gas, steam and electric heat.
Single and three phase power supply.
To Next Page
Loading...
Need help?
General