15. Heat Error (Machines with Auxiliary Heat Only)
CHM477S
Heat Error (Machines with Auxillary Heat Only)
Is heat enabled in
programming?
Is configuration
jumper installed
on H8-3 - H8-10?
Yes
Enable heat in programming.
No
Remove or cut configuration jumper,
and reset power.
Yes
Is there water in
the machine?
No
Refer to "Machine Does Not Fill with
Water" flowchart.
No
Is there 220V at H7-2
and H7-5 when the
heater output is on?
Yes
Yes
Refer to "No Outputs" flowchart.
No
For Steam Machines:
1. Check wiring at J14.
2. Check steam valve coil.
3. Check voltage at line side/load
side of heat contactor.
For Electric Heat Machines:
1. Check wiring at J14 and J5.
2. Check electric heat contactor coil.
3. Check voltage at line side/load
side of heat contactor.
Check the
auxiliary level switch
(heat safety). Does it
show open?
The switch must show open for heat to start.
No
Yes
B
C
A
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