3-6
TROUBLESHOOTING
Models C712/C713
Troubleshooting
3
C712/C713 Electrical Troubleshooting Guide
Power Cord Plugged In/Power Switch in the
OFF Position
L1 power from the power cord connection travels through
the EMI filter to the 16 volt transformer. The transformer
supplies 16 VAC to terminals A and B on the interface
board.
The interface board sends 5 VDC to terminal J1 on the
universal board.
Power Switch in the ON Position
L1 power from the power cord connection is supplied to
the terminals marked L1 on the interface board. To
supply power to the L1 terminal on the interface board,
L1 travels through the following switches: the power
switch, beater motor overload switch, compressor high
limit switch and 15 amp fuse.
Power Switch in the ON Position/Mode
Select: Wash mode
With L1 power supplied to the L1 terminal of the interface
board, power is supplied through pin 7 of the J6 terminal,
beater interlock relay, and to the beater motor contactor
coil.
Power Switch in the ON Position/Mode
Select: PUMP
With L1 power supplied to the L1 terminal of the interface
board, power is supplied through pin 5 of the J6 terminal
to the air/mix pump motor overload and then to the air/
mix pump motor.
Power Switch in the ON Position/Mode
Select: Auto mode
Power is sent from the L1 terminal of the interface board
through the following pins on the J6 terminal:
7 for the beater motor contactor coil
5 for the air/mix pump (30 seconds only)
1 for the compressor contactor coil
Power Switch in the ON Position/Mode
Select: Auto/Draw Switch Activated
Power is sent from the L1 terminal on the interface board
through the following pins on the J6 terminal:
7 for the beater motor contactor coil
5 for the air/mix pump (The pump runs for 10 seconds
after the draw handle is closed.)
1 for the compressor contactor coil
At the completion of a draw, the beater motor and
compressor are cycled off by the personality board amp
monitor.
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