Alliance Laundry Systems CA050L - Steam OM Control: No Heat With Cycle Selected

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Troubleshooting
21.Steam OM Control: No Heat With Cycle Selected, Unit Running and
Calling For Heat
120 Volt/60 Hertz/1 Phase and 208-240 Volt/60 Hertz/1 Phase Nonreversing
460-480 Volt/60 Hertz/3 Phase and 208-240 Volt/60 Hertz/3 Phase Reversing and Nonreversing
Steam OM Models:
No heat with cycle
selected, unit
running and calling
for heat
Is there
voltage at
H2-13?
Replace micro
control.
Is there
voltage at
H2-6?
Correct wiring
between H2-6
and H2-13.
Is there
voltage at
H2-5?
Check for proper
thermistor
operation. Replace
micro control if
necessary.
Is there
voltage to the
input of the
motor relay?
Correct wiring
between motor
relay and micro
control.
Is there voltage
to the output of
the motor relay?
Replace motor
relay.
TMB1892S
Is there
voltage to the
input of the
motor switch?
Correct wiring
to motor
switch.
Is there
voltage to the
output of the
motor switch?
Replace motor.
Is there
voltage across
the steam
valve coil?
Correct wiring
to steam valve
coil.
Unit operational. If unit
still does not heat,
check steam supply.
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
Yes
TMB1892S