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

Electronic Control Troubleshooting
32. Will Not Start/Continue Running – OPL Microprocessor Control
Gas, steam and
electric heat.
Single and three phase
supply.
Is power supplied to
unit?
YES
Is there voltage to input
of primary fuse(s)?
YES
Is there voltage to
output of primary
fuse(s)?
YES
Is there voltage
across terminals 1 & 2
on primary of
transformer?
YES
Is there voltage
across terminals 2 & 3
of transformer
secondary?
YES
Is there voltage to input
of secondary fuse?
YES
54
Reference voltage to
supply neutral.
NO
Connect supply
and run unit.
Correct wiring
NO
between primary
fuse and supply.
NO
Change primary
fuse.
Correct wiring
NO
between transformer
and primary fuse.
NO
Replace
transformer.
Note: Reference voltage to
transformer secondary neutral
terminal 3.
Correct wiring
NO
between secondary
fuse and
transformer.
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Is there voltage to
NO
output of secondary
fuse?
YES
Is there voltage to
NO
N.O. terminal of door
switch?
YES
With door closed is
NO
there voltage to COM
of door switch?
YES
Is there voltage to NO
N.O. of lint panel
switch?
YES
Is there voltage to
NO
COM of lint panel
switch with lint panel
closed?
YES
Is there voltage at
NO
terminal 8 of OPL
Micro?
YES
Continued on next
page.
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.
Check for proper
operation and
replace lint panel
switch if necessary.
Correct wiring
between terminal
8 of OPL Micro
and COM of lint
panel switch.
T099D
T099D
70291301