Alliance Laundry Systems YT035E, Troubleshooting Manual

Page: 86 / 224

84
70380601 © Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
On Premise Micro Control (OM) Troubleshooting
34. Door Open Indicator
Is there
24 VAC at the
input of the
secondary
fuse?
Door Open
Indicator
Is there
24 VAC between
H2-8 and
H2-9?
Is there
power supplied
to the unit?
No
Replace control.
Yes
Plug unit in and
start cycle.
No
Is there
120 VAC at
output side of the
primary fuses?
No
Replace primary
fuse(s).
Is there
120 VAC across
terminals 1 & 2 of
transformer
primary?
No
Correct wiring
between primary
fuses and
transformer.
TMB2252S-a
Yes
No
Replace
transformer.
Is there
24 VAC across
terminals 2 &
3 of transformer
secondary?
Yes
Is there
120 VAC at input
of primary fuses?
No
Correct wiring
between primary
fuses and power
supply.
Yes
Gas, steam and electric heat.
Single and three phase power supply.
(1)
(2)
(3)
(4)
(5)
Yes
Reference voltage
checks to transformer
neutral.
(6)
Correct wiring
between
secondary
fuse and
transformer.
Yes
No
Is there
24 VAC at output
side of secondary
fuse?
(7)
No
Replace
secondary fuse.
Is there
24 VAC at COM
of door switch?
(8)
No
Correct wiring
between COM
and output of
secondary fuse.
Yes
Yes
Continued on
next page
Yes