Assessments - 3, GPA: 4.7
(
)
)
|
Facilidade de uso
If continuity is present as described, reconnect the wires, the switch is operating properly. If continuity is not present as described, replace the switch. Removal and Replacement: 1. Remove all wires from the switch terminals. 2. Compress the clips inside the front of the housing and gently push the switch through the opening. 3. Push the new switch into the opening and spread the clips to retain the switch in the housing. 4. Refer to the following illustration when re- connecting the wires. 16 PNK TO OPTIONAL MULTISET SWITCH P742 PNK TO OFF/ON/ START SWITCH YEL TO J1- 1 BLU TO RIGHT MOTOR VIO TO J4 - 3 WHI/ BLU TO LEFT MOTOR REAR VIEW Motors NOTICE For connection to Bunn-Omatic Coffee Brewer Models: Dual, OT, Single, & System III only. (24 volt N.E.C. Class 2 circuit only.) BUNN MANUFACTURED BY BUNN-O-MATIC CORPORATION SPRINGFIELD, ILLINOIS, U.S.A. MODEL S/N VOLTS A.C. AMP WATTS PHASE WIRE HERTZ COVERED UNDER ONE OR MOREOF THE FOLLOWING PATENTS : ONE OR MORE OTHER PATENTS MAY BE PENDING 1 2 3 4 5 REAR VIEW P743 1. Motor Circuit Assembly 2. Motor & Circuit Assembly Mounting Screws 3. Motor Mounting Screws 4. Hopper Selector Switch 5. Motor Mounting Bracket Location: The motors are located in the center part of the housing just below the hopper. 10854 030300 SERVICE (cont.) Motor (cont.) Removal and Replacement: Test Procedure: 1. Disconnect grinder from the power supply. 2. Remove upper front inspection panel. 3. Remove the two 1/4"-20 screws (A) holding the front cover (B). 4. Remove load disc (C) from burr auger rotor/assembly (D). 5. Remove burr auger rotor/spring assembly (D) from the burr housing (H). 6. Remove rear panel. 7. Disconnect the red, black and blue wires from the left or right motor to the motor circuit assembly (1). 8. (A) Left Motor - Disconnect blue wire on the left motor from the blue wire to the hopper selector switch. (B) Right Motor- Disconnect the blue wire on the right motor from the white/blue wire to the hopper selector switch. 9. Connect leads of an ohm meter to the blue wires from the left or right motor. Check for continuity. If continuity is present the motor overload is good. If continuity is not present press the red "RESET" button. Listen carefully for a "click". This resets the motor overload. Recheck for continuity. If continuity is now present the motor overload is reset. If motor overload does not reset replace motor. 10. Set an ohm meter to read at least 10 ohms. Connect leads from ohm meter to the black and red wires from the left or right motor. The ohm reading should be approximately 10 ohms. Rotate the motor shaft approxi mately 1/8 turn through one full rotation. If ohm readings are consistent motor wind ings are good. If reading vary more than ±1 ohm, replace motor. 1. Disconnect red, black and blue wires from the motor to be removed from the motor circuit assembly (1). 2 Loosen the two #10-32 slotted head screws (2) attaching motor circuit assembly (1) to motor mounting bracket (5). 3. Remove motor circuit assembly (1) with wires from harness and the opposite motor connected. 4. Right Motor - Disconnect blue wire on motor from blue wire on hopper selector switch (4). Left Motor - Disconnect blue wire on motor from white/blue wire on hopper selector switch (4). 5. Using a 7/16" socket, extension and rachet remove two 1/4"-20 hex head capscrews and lockwashers (3) attaching front of motor to front of mounting bracket (5). 6. Remove two #10-32 slotted hex head screws (2). 7. Lift motor out of mounting bracket (5) and remove through the rear of grinder with hopper collar and discharge chute assembly attached. 8. Remove four #10-24 slotted hex head screws attaching discharge chute to motor. Remove discharge chute. Set discharge chute and screws aside for reassembly. 9. On new motor assembly with hopper collar install discharge chute assembly using four #1024 slotted hex head screws. 10. Mount new motor, hopper collar and discharge chute assembly on mounting bracket using two 1/4"-20 hex head capscrews and lockwashers (3) and two #10-32 slotted hex head screws (2) and one external tooth lockwasher. 11. Install motor circuit assembly (1) between head of the two #10-32 slotted hex head screws (2) and external tooth lockwashers. Tighten screws (2). 12. Refer to wiring diagram (pages 24 & 25) and connect wires from motor to motor circuit assembly (1) and hopper selector switch (4). 10854 030300 17 18 SERVICE (cont.) Motor (cont.) Removal and Replacement - GRIND CHAMBER H G D C B F E A COARSE FINE THOROUGHLYCLEANGRINDCHAMBERBEFOREREASSEMBLY EMPTYHOPPERBEFOREREMOVINGTHISCOVER. NOTICE COARSE-FINE BUNN COARSE FINE THOROUGHLYCLEANGRINDCHAMBERBEFOREREASSEMBLY EMPTYHOPPERBEFORE REMOVINGTHISCOVER. NOTICE COARSE-FINE BUNN 20667.0000 20666.0000 P744 1. Remove the two 1/4"-20 screws (A) holding the front cover (B) to the burr housing (H). Carefully remove the burr housing front cover with adjusting screw and nut. Inspect adjusting screw to see if worn. Replace if excessively worn...