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Troubleshooting
43. MM Models: No Heat With Cycle Selected, Unit Running and Calling
For Heat
208-240 Volt/60 Hertz/3 Phase Gas Reversing
MM Models: No Heat with
cycle selected, unit
running and calling
for heat
Is
there voltage
to the COM terminal
of the micro
control?
TMB2170S-a
Correct wiring
between door
switch and micro
control.
Is
there voltage
to the N.O. terminal
of the micro
control?
Replace the
micro control.
Is
there voltage
to the COM terminal
of the airflow
switch?
Correct wiring
between airflow
switch and micro
control.
Is
there voltage
to the N.O. contact
of the airflow
switch?
Check for proper
operation of airflow
switch and airflow.
Replace airflow
switch if necessary.
Is
there voltage
to the input of the
stove limit?
Correct wiring
between stove limit
and airflow switch.
Yes
No
No
Yes
No
Yes
No
No
Is there voltage
to the output of the
stove limit?
Check for proper
airflow and flame
pattern. Replace
stove high limit if
necessary.
Is there voltage
to the input of the
cabinet high limit?
Correct wiring
between cabinet
high limit and stove
high limit.
Is there
voltage to the output
side of the cabinet
high limit?
Check for proper
airflow. Replace
cabinet limit if
necessary.
Yes
No
No
Yes
No
Yes
Yes
Is there
voltage to L1 of the
IEI board?
Correct wiring
between IEI board
and cabinet high
limit.
Yes
No
Continued on
next page
Yes
Содержание ATB50CG
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