Drain, Rinse 1; Thermoactuator And Shake Out; Control Mounting Trough - Dexter Laundry T-300 Service Procedures And Parts Data

Machine Electrical & Wiring Schematics
Drain, Rinse 1 & 2, & Final Rinse Circuit
hen the bath ends the micro-controller PCB removes 115 VAC power from brn/yel coming from
main relay PCB at P17 to the Drain Valve. The normally-open spring-loaded Drain Valve opens
and empties the tub. For Rinse 1 & 2, the Rinse LED will illuminate.The rinse water temperatures
are programmable and will fi ll as above. For the Final Rinse, the Final Rinse LED will illuminate.
These water temperatures are programmable also and will fi ll as described above.Also the soft-
ener dispenser will fl ush cold water from C2 cold water valve solenoid at beginning of fi nal rinse
bath for 20 sec..
Extract Circuit
The Spin LED will illuminate and the washer controller PCB sends a signal to the Variable fre-
quency drive via the data cable at P6 to VFD RJ-11. The rotation as viewed from front during spin
will be CCW except for the 18 lb washer it will spin CW. The motor is a 3 phase 230 VAC type
motor for all models .
Thermoactuator and Shake Out Circuit
The Lock Thermoactuator loses power and opens 1 1/2 minutes before the end of the cycle .
This allows the Thermoactuator time to retract by the end of the cycle. To insure that the Lock
Thermoactuator has retracted by the end of the cycle, 1 minute prior to the end of the cycle, the
Unlock Thermoactuator is powered with 115VAC through the org/red wire from P17 at main relay
PCB. The basket will come to a stop from extract speed with the assistance of dynamic braking
resistors wired in parallel to the variable freqency drive. The washer will then tumble for 45
seconds to let the clothes shake loose and then stop.
End of Cycle Circuit
The machine is now stopped and does 2 things: 1. The beeper will signal for 5 seconds letting the
user know that it is the end of the cycle. 2. The micro-controlled PCB resets and display will reset
when door is opened and it is now ready to run again.

Control Mounting Trough

Remove top panel to access control trough. (see Removing Top Panel) It sets on the right side of
the machine and holds the control PCB's, transformers,and pressure switch.
62