Will Not Start/Continue Running - Edc Control - ALLIANCE T30 Series Troubleshooting Manual

31. Will Not Start/Continue Running – EDC Control
Is there voltage at
H4-4 on the EDC
control to transformer
neutral?
NO
Is there power supplied
to the unit?
YES
Is there voltage to input
of primary fuse(s)?
YES
Is there voltage to
output side of the
primary fuse(s)?
YES
Is there voltage
across terminals 1 & 2 of
transformer primary?
YES
Is there voltage
across terminals 2 & 3 of
transformer
secondary?
YES
70291301
Single and stacked
units. Gas, electric and
Note: Test conducted with vend
steam heat. Single and
price satisfied and start button
three phase supply.
pressed.
YES
Continued on next
page.
NO
Plug unit in and run
it.
Correct wiring
NO
between primary
fuse(s) and power
supply.
NO
Replace primary
fuse.
Correct wiring
NO
between primary
fuse and
transformer.
NO
Replace
transformer.
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Electronic Control Troubleshooting
Is there voltage at the
NO
input of the secondary
fuse?
YES
Is there voltage to
NO
output side of
secondary fuse?
YES
NO
Is there voltage to N.O.
of door switch?
YES
With door closed is
NO
there voltage to COM
of door switch?
YES
NO
Is there voltage to N.O.
of lint drawer switch?
YES
Is there voltage to
NO
COM of lint drawer
switch with lint panel
closed?
YES
Is there voltage at
NO
H4-1 on the EDC
control board?
YES
Replace EDC
Control.
Correct wiring
between secondary
fuse and
transformer.
Replace secondary
fuse.
Correct wiring
between N.O. and
output of secondary
fuse.
Check for proper
function of door
switch replace if
necessary.
Correct wiring
between N.O. on lint
drawer and COM on
door switch.
Check for proper
operation replace if
necessary.
Correct wiring
between H4-1 and
COM of lint drawer
switch.
T029D
T029D
51