Alliance Laundry Systems CA050L - Page 112

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On Premise Micro Control (OM) Troubleshooting
58.Unit Will Not Heat – Gas (continued)
Please see following page for wiring diagram information.
Is there
voltage to the
output side of the
stove limit?
Is there
voltage to
terminal 2 of the
Ignition Control
Module (ICM)?
Yes
Check operation
of stove limit.
Replace if
necessary.
No
Correct wiring
between terminal 2
of ICM and stove
limit.
No
TMB2340S-b
Is there
voltage at
terminal 1 of
ICM board?
No
Replace
ICM board.
Yes
(11)
(13)
Continued from
previous page
(12)
Note: Make sure unit is
not in a lockout condition.
Is there
voltage across
the coils of the
gas valve?
No
Correct wiring
between gas
valve and
ICM board.
(14)
Yes
Is there gas flow
through the gas
valve?
Replace gas
valve coils or
complete
gas valve.
Yes
No
Does the igniter
spark?
Replace high
voltage ignition
cable, igniter or
ICM board.
Is there a
flame?
Unit
operational.
Yes
No
Yes
Yes
No
TMB2340S-b