Electrical Path Circuit Schematics
Start Circuit
Power travels into the machine on L1, L2, and (L3 if 3 phase used). Power from the L1 & L2 supplies power to
the 12VDC power supply. This power being sent to the Control PCB. 115VAC, 24VAC, and the VAC Neutral is cre-
ated by the control transformer. The 115VAC and 24VAC is being sent to the Terminal Blocks. Power from the L1
and L2 also supplies power to the 12VDC power supply. The 12VDC power is sent directly to the Control PCB on
the blue wires.
•All 115VAC power is designated in the machine by red wire connections and the 115VAC neutral is designated by
white wires with a red stripe. All 115VAC begins at the terminal block for 115VAC supplied through a control fuse
located next to the terminal strip.
•All 24VAC power is designated in the machine by orange wire connections and the 24VAC neutral is designated
by white wires with an orange stripe. All 24VAC begins at the terminal block for 24VAC supplied through a control
fuse located next to the terminal strip.
•All 12VDC power is designated in the machine by blue wire connections and the 12VDC ground is designated by
white wires with a blue stripe.
Closing the door will engage the door hinge closed switch, sending the J11-5, 12VDC to the blue/white wire and
over to the S1 door latched switch. Turning the door handle to the vertical latched position closes the primary door
latched switch, returning the 12VDC voltage to the main control PCB on the blue/orange wire at the J11-2 connec-
tion. This proves the door is closed and latched and ready for safe operation.
A 12VDC signal to J11-2 of the Control PCB and 120vac at the J4-14 of the relay PCB makes 120vac available to
the K9 door lock relay. A continuous 5VDC signal is sent out on the J11-6 brown wire and returned on the brown/
white wire to the J11-3 connector of the control PCB. This is passed through the (normally closed) emergency stop
button switch.
The Washer is ready for operation.
The cycle is selected using the up and down buttons. The start button is now pressed. The control signals the relay
board to close relay K9 sending 120VAC to the door lock on the red/brown wire. The door lock motor engages and
pulls up on the door locking rod which locks the door and closes the S3 and S4 door locking switches. This sends
the 12VDC signal back to the control at J11-1 on the blue/grey wire. This 12VDC also pulls in the K4 relay which
sends 24VAC to the normally closed K2 relay that powers the Locking Thermoactuator to expand and block the
locking mechanism. At the same time the K5 relay is engaged sending an enable signal to the variable frequency
drive. 120VAC will go to the door lock assembly from the P17 connector of the relay PCB on the red/brown wire.
The door lock motor engages and pulls up on the door locking rod, locking the door and closing the S2 and S3 door
locking switches. The Locking Thermoactuator receives 24VAC on the orange/green wire and will expand to block
the locking mechanism.
NOTE: If the door locked signal is not received after one second from pressing the Start button, no motion occurs
and the error message “DOOR SHUT, NOT LOCKED” will appear on the display. The washer will not restart until
the power is removed and re-applied.
The door lock gear motor will test the door locking circuit 10 seconds before the end of the rst stage. The control
will release the 120VAC to the red/brown wire which will cause the Gear Motor to release which tests the Locking
Thermoactuator safety circuit. This release will last for 10 seconds. As long as the Thermoactuator has properly
extended to block the door locking mechanism, the machine will continue as normal.
72
Part # 8533-110-001 11/20
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