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Electronic Control Troubleshooting
48.Will Not Heat – Steam – OPL Microprocessor
T003D
Change primary
fuse.
Correct wiring
between transformer
and primary fuse.
Replace
transformer.
Correct wiring
between secondary
fuse and
transformer.
Replace secondary
fuse.
Correct wiring
between N.O.
terminal of door
switch and
secondary fuse.
Check for proper
operation, replace
door switch if
necessary.
Correct wiring
between N.O. of
lint panel switch
and COM of door
switch.
YES
YES
YES
YES
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
NO
NO
NO
NO
Continued on next
page column 1.
Note: Reference voltage to
transformer secondary neutral
terminal 3.
Connect supply
and run unit.
Correct wiring
between primary
fuse and supply.
Continued on next
page column 2.
Replace thermister.
YES
NO
NO
YES
Reference voltage to
transformer neutral
terminal 3.
Testing conducted with unit
running and calling for heat.
Reference voltage to
supply neutral.
Is power supplied to
unit?
Is there voltage to
output of primary
fuse(s)?
there voltage across
terminals 1 & 2 on
primary of
transformer?
Is there voltage across
terminals 2 & 3 of
transformer
secondary?
Is there voltage to input
of secondary fuse?
Is there voltage to
output of secondary
fuse?
Is there voltage to
N.O terminal of door
switch?
With door closed is
there voltage to COM
of door switch?
Is there voltage to
N.O. of lint panel
switch?
Is there voltage to input
of primary fuse(s)?
Is the thermister
operating properly?
Is there votlage at
terminal 5 on OPL
Micro?
T003D
Is
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