Troubleshooting Chart For Display Head Pin Failures - Thermador CM301B Service Manual

Lit. No. 94-30-006B
for display head pin header failures
Wire harness off at pin header or open circuits
P10 Accepts display signals from relay board:
Glass control panel is completely dead. No display, circuit
must be reset.
P11 Accepts communication signals from relay board:
Glass control panel is completely dead. No display, circuit
must be reset.
P2 Upper oven meat probe:
No probe display when probe is inserted. Wont accept pro-
gram. If probe is shorted, the probe display will be on con-
stantly and the unit will accept no programs at all.
P6 Upper oven air switch:
F-34 will appear if upper oven air switch does not close. If
air switch does not close the mode is cancelled after about 45
seconds.
P4 Lower oven air switch:
F64 will appear if lower oven air switch does not close. If air
switch does not close the mode is cancelled after about 45
seconds.
P8 Power supply to touch control board:
No fail code, time of day on clock, control panel is dead, no
reaction.
P1 Display/communication signals to tcb:
No fail code. Time of day on clock, control panel is dead, no
reaction.
Troubleshooting chart for right side touch
control board header pin failures
Wire harness off at pin header or circuits open:
P2 Sends commands to display head:
No fail code. Will not send commands from right side of tcb
to display head. Such as numbers 0 through 9 and "start."
Troubleshooting chart
Page 83
CM Oven Service Manual