Control Display - No Visible Display - Power On - ALLIANCE T30 Series Troubleshooting Manual

24. Control Display – No Visible Display – Power On
Is there voltage across
H4-2 & H4-5 on the
EDC control?
NO
Is there power supplied
to the unit?
YES
Is there voltage to input
of primary fuses?
YES
Is there voltage to
output side of the
primary fuses?
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 and electric
heat. Single and three
phase supply.
YES
Replace EDC
Control.
NO
Plug unit in and run
it.
Correct wiring
NO
between primary
fuses and power
supply.
NO
Replace primary
fuse(s).
Correct wiring
NO
between primary
fuse and
transformer.
NO
Replace
transformer.
© Copyright, Alliance Laundry Systems LLC – DO NOT COPY or TRANSMIT
Electronic Control Troubleshooting
Correct wiring
Is there voltage at
NO
between secondary
the input of the
secondary fuse?
transformer.
YES
Is there voltage to
NO
Replace secondary
output side of
secondary fuse?
YES
Correct wiring
between H4-2 and
secondary fuse.
fuse and
fuse.
T025D
T025D
41