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14

COMPONENT SCHEMATIC

TESTING PROCEDURE

RESULTS

Timer Motor

Timer

Dispenser Mechanism

1.

Disconnect the Wiring harness
connector from the timer assembly.

2.

Set VOM meter on the Rx1 scale.

3.

Measure resistance between timer
motor terminals.

1.

Disconnect the wiring harness
connector from the timer assembly.

2.

Set VOM meter on the Rx1 scale.

3.

Connect one probe to contact 31.
(Tan)

4.

Connect the other probe to the timer
contact to be tested.

5.

Manually advance the timer until the
contact closes.

6.

Manually advance the timer until the
contact opens.

1.

Remove the front door panel.

2.

Remove the drip cover.

3.

Latch the detergent door closed.

4.

Manually advance the timer through a
complete cycle slowly.

1.

Meter should read 1800 - 3000

Ω.

1.

Contact CLOSED - meter should
read 0

Ω.

2.

Contact OPEN - meter should
read º (infinity).

1.

At 12 o’clock position - Draw bars
will move upward causing the
detergent actuator assembly to
release the latch and detergent
cup should open.

2.

At 4 o’clock position - Draw bars
will again move upward causing
the wetting agent actuator to
release wetting agent.

3.

From the 6 o’clock position to the
8 o’clock position the draw bars
are driven down to reset the
mechanism.

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Содержание DP840DWG

Страница 1: ...DUCATION GROUP PRESENTS KD 10 JOB AID Part No 4322430 1998 DISHWASHERS Servicing and Troubleshooting MODELS DU800DWG DU801DWG DU805DWG DU810DWG DP840DWG DU840DWG DU850DWG DU890DWG DU910PFG DP920PFG DU920PFG GU940SCG GU960SCG GU980SCG ...

Страница 2: ...Aid is to provide detailed information that will enable the service technician to properly diagnose malfunctions and repair the 1998 lineup of Dishwashers The objectives of the Job Aid are The service technician will Understand proper safety precautions Successfully troubleshoot and diagnose malfunction Successfully perform necessary repairs Successfully return the dishwasher to proper operational...

Страница 3: ...ELS W TOWER WATER FEED Models DU910PFG DP920PFG DU920PFG Theory of Operation 27 Component Access 28 Troubleshooting Guide 33 Technical Information 34 SECTION THREE POWER CLEAN FILTER MODELS W INTERNAL WATER FEED Models GU940SCG GU960SCG GU980SCG Theory of Operation 43 Component Access 44 Diagnostics 49 Troubleshooting 50 Technical Information 51 SECTION FOUR Installation Considerations Custom Door...

Страница 4: ...IV NOTES ...

Страница 5: ...1 Section One DURAWASH MODELS WITH SOILSETTLERANDTELESCOPINGTOWER THEORY OF OPERATION Console Configuration DU800DWG DU801DWG DU805 DU810DWG DU840DWG DP840DWG DU850DWG DU890DWG ...

Страница 6: ...he dishwasher is in the Wash mode When the Wash cycle is finished the dishwasher will reverse the direction of the motor and enter the Drain mode Water is pumped into the port at the bottom of the soil collector during the Drain cycle causing the ball in the collector to rise against the opening in the bottom of the funnel Water flows through and out of the collector through the top port and into ...

Страница 7: ... Location WARNING ELECTRICAL SHOCK HAZARD Disconnect electric supply from the dishwasher before servicing Replace all panels before operating Failure to do so could result in death or electrical shock Bottom Right side Rear of Tub ...

Страница 8: ...etaining screw from the spray arm and removing the split ring seal the pump outlet nut and the support and bearing assembly Fig 1 5 Fig 1 4 Fig 1 5 SPRAY ARM ASSEMBLY SPLIT RING SEAL PUMP OUTLET NUT SUPPORT BEARING RETAINING SCREW Removing the Pump and Motor Assembly 1 Disconnect the dishwasher from the household electrical system 2 Lay the dishwasher on its back and disconnect the wiring harness ...

Страница 9: ... removed from the pump assembly by removing the three T 20 Torx screws securing the motor to the pump assembly Fig 1 8 TORX SCREWS NOTE When reinstalling the motor make sure the keyed motor shaft lines up with the pump impel ler Fig 1 8 Servicing the Pump Assembly The pump impeller can be accessed by using an adjustable slip nut wrench to turn the disk mount assembly counterclockwise Once the disk...

Страница 10: ...soil settler collector Fig 1 11 FUNNEL GRATE FUNNEL CHECK VALVE BALL SEAL CLAMPS HOSE Fig 1 11 Removing the Heater Element 1 Disconnect the dishwasher from the household electrical system 2 Disconnect the wiring harness connectors from the heater element terminals with a pair of needlenose pliers 3 Remove the two long Hex head nuts securing the heater element to the tub Fig 1 12 4 Remove the heate...

Страница 11: ...the electrical supply to the dishwasher off and remove the toe panel and access panel 2 Disconnect the orange and white wires from the thermal fuse terminals Fig 1 16 3 Remove the Hex head screw securing the thermal fuse to the tub and remove the thermal fuse from the dishwasher Removing the Float Switch 1 Turn the electrical supply to the dishwasher off and remove the toe panel and access panel 2...

Страница 12: ...sing the two 2 retaining tabs at each end from the door frame Removing the Check Valve 1 Remove the toe panel and access panel from the bottom of the dishwasher 2 Remove the hoses from the check valve 3 Remove the Hex head screw securing the check valve to the tub support Fig 1 19 RETAINING SCREW Fig 1 19 Removing the Motor Relay 1 Disconnect the dishwasher from the electrical supply and remove th...

Страница 13: ... timer cam and cam follower can now be removed NOTE When reinstalling the cam be sure it is aligned with the keyed shaft of the timer When reinstalling the timer be sure the cam follower post is positioned inside the cam s groove Removing the Timer Fig 1 23 Screw Wiring Harness Connector Removing the Switch Assembly Screw 1 Disconnect the dishwasher from the electrical supply and remove the toe pa...

Страница 14: ...Use Special Tool Part No 303918 or a socket to press over the attaching tabs in the wet agent cap opening Remove wet agent dispenser assembly 7 Remove wet agent dispenser actuator by spreading the two 2 locking tabs Fig 1 30 8 Remove the upper and lower slides from the wet agent dispenser actuator 9 Remove the diaphragm spring and diaphragm 10 Use a screwdriver to gently release the lower tab and ...

Страница 15: ...11 Fig 1 28 Fig 1 29 Fig 1 30 Fig 1 31 ...

Страница 16: ...t agent dispenser actuator 6 Press the wet agent dispenser actuator into position on the dispenser so the lock ing tabs engage 7 Press the wet agent dispenser assembly into position so the locking tabs engage the wet agent cap opening No tool is needed for assembly Fig 1 29 8 Install the seal on the wet agent cap 9 Insert the wet agent cap Turn it clock wise and close it 10 Slide the upper and low...

Страница 17: ... the blue white connector 5 Connect the meter probe to the yellow connector 6 Connect the probe to the grey connector 1 Disconnect wires connectors from the thermal fuse terminals 2 Set VOM meter to read Rx1 scale 3 Measure resistance between thermal fuse terminals 1 Disconnect the wire connectors from the heater element terminals 2 Set VOM meter to read Rx1 scale 3 Measure resistance between heat...

Страница 18: ...es 6 Manually advance the timer until the contact opens 1 Remove the front door panel 2 Remove the drip cover 3 Latch the detergent door closed 4 Manually advance the timer through a complete cycle slowly 1 Meter should read 1800 3000Ω 1 Contact CLOSED meter should read 0Ω 2 Contact OPEN meter should read º infinity 1 At 12 o clock position Draw bars will move upward causing the detergent actuator...

Страница 19: ...rotection float is stuck in up position 2 Fill valve is inoperable 3 Open timer contacts 1 Air gap if installed is clogged 2 Pump motor is inoperable 3 Open timer contacts 1 Heater element burned out 2 Hi limit thermostat inoperable 3 Open circuit between timer and heater 1 Check to make sure handle link is properly seated in door latch assembly Check that the door switch is opening and closing pr...

Страница 20: ...16 TECHNICAL INFORMATION Wiring Diagram Models DU800DWG DU801DWG DU805DWG SCHEMATIC SHOWN WITH DOOR SWITCHES CLOSED ALL CONTACTS OPEN ...

Страница 21: ...17 Cycle Timing Chart ...

Страница 22: ...18 Wiring Diagram Model DU810DWG SCHEMATIC SHOWN WITH DOOR SWITCHES CLOSED ALL CONTACTS OPEN ...

Страница 23: ...19 Cycle Timing Chart ...

Страница 24: ...20 Wiring Diagram Models DU840DWG DP840DWG SCHEMATIC SHOWN WITH DOOR SWITCHES CLOSED ALL CONTACTS OPEN ...

Страница 25: ...21 Cycle Timing Chart ...

Страница 26: ...22 Wiring Diagram Model DU850DWG SCHEMATIC SHOWN WITH DOOR SWITCHES CLOSED ALL CONTACTS OPEN ...

Страница 27: ...23 Cycle Timing Chart ...

Страница 28: ...24 Wiring Diagram Model DU890DWG SCHEMATIC SHOWN WITH DOOR SWITCHES CLOSED ALL CONTACTS OPEN ...

Страница 29: ...25 Cycle Timing Chart ...

Страница 30: ...26 NOTES ...

Страница 31: ...lade grinds the particles into smaller sizes that then pass through the perforated plate into the upper chamber of the pump The pump impeller causes the soil ladened water to be lifted and moved to the outer edges of the pump chamber where they are forced into the separator Clean water is then forced up through the spray arms and fine mesh screen Fig 2 3 3 When the drain cycle begins the drive mot...

Страница 32: ...CH ASSEMBLY FILL VALVE MOTOR RELAY FLOAT SWITCH OPERATING THERMOSTAT Attached to bottom of pump housing HI LIMIT THERMOSTAT PUMP AND MOTOR ASSEMBLY HEATER DETERGENT AND RINSE AID DISPENSER ASSEMBLY PROGRAM SWITCHES INDICATOR LIGHTS ...

Страница 33: ...ment From inside the tub 1 Carefully place the terminal ends of the heater element through the two 2 holes at the bottom rear of the cabinet 2 Slide the metal disks into the clips to secure the left and right sides of the heater element 3 Replace the lower spray arm 4 Replace the lower dish rack From underneath the cabinet 5 Secure the heater element in place with two 2 nuts Be sure the element is...

Страница 34: ...tuned resonator NOTE A small container will be required to catch water from the drain hose after removal 6 Remove the pump and motor assembly by pulling up through the inside of the tub Fig 2 9 Fig 2 9 Fig 2 7 Clamp Shown Rotated Inward 90 Check Valve Drain Hose Clamp Drain Hose Fig 2 8 Servicing the Operating Thermostat The operating thermostat is secured to the bottom of the pump housing Fig 2 1...

Страница 35: ...et 5 Remove the existing door insulation Access to the detergent and rinse aid dispensers is now possible Fig 2 11 1 Disconnect the dishwasher from the electrical supply 2 Disconnect the end of the door springs from the door spring tension adjustment holes in the frame runner 3 Open the dishwasher door and remove the eight 8 T 15 Torx screws securing the inner door panel from the door frame Fig 2 ...

Страница 36: ...g tab located on the door frame rail just below the console Fig 2 14 To remove this assembly remove the spring and slide the locking tab back until the locating tab is in the key hole Fig 2 15 Then lift the locking tab up To replace the assembly reverse this procedure Locking Tab Assembly Fig 2 14 Fig 2 15 ...

Страница 37: ...erflow protection float is stuck in up position 2 Fill valve is inoperable 3 Open timer contacts 1 Air gap if installed is clogged 2 Pump motor is inoperable 3 Open timer contacts 1 Heater element burned out 2 HI limit thermostat inoperable 3 Open circuit between timer and heater 1 Check to make sure handle link is properly seated in door latch assembly Check that the door switch is opening and cl...

Страница 38: ...34 TECHNICAL INFORMATION Model DU910PFG Wiring Diagram SCHEMATIC SHOWN WITH DOOR SWITCHES CLOSED ALL CONTACTS OPEN ...

Страница 39: ...s HEAT DRY Steps 30 44 FILL Steps 1 9 14 23 48 WASH Steps 2 7 10 12 15 20 24 28 49 DRAIN Steps 8 13 21 22 29 50 WATER HEATING Steps 6 7 18 19 23 24 NO HEAT DRY Switch H OPEN Harness Terminal Block Wire End Black White ...

Страница 40: ...36 Cycle Timing Charts ...

Страница 41: ... free to move up and down Check that the overfill switch in opening and closing properly 2 Check for continuity between contacts on fill valve 3 Check for 110VAC between P2 5 and P12 3 1 Follow air gap manufacturer s direction for cleaning 2 Disconnect pump motor from wiring harness and check for continuity between V BU V GY and V Y 3 Check for 110VAC between P10 and P3 P10 and P5 and P10 and P4 1...

Страница 42: ...Interface Pressure Switch Soil Sense Thermistor Thermostat Detergent Dispenser Rinse Agent Dispenser Fill Valve Motor Main Winding Motor Auxiliary Winding Wash Motor Auxiliary Winding Drain Switch L1 to Heater AC Neutral L1 Switched L1 to Vent Fill Valve Dual Dispenser Pressure Sw Switched L1 to Motor Common Wire Color O GY GY O O BK LBU BR BU Y GY W R W V T R BK P9 BU BK ...

Страница 43: ...39 STRIP CIRCUITS ...

Страница 44: ...40 STRIP CIRCUITS CYCLE TIMING CHART ...

Страница 45: ...icator is illuminated at the end of the cycle During a cycle in which sani rinse has been selected the target thermal hold temperature for the sani rinse option must be satisfied and maintained If this condition is not satisfied because the final rinse thermal hold default time elapsed or power to the dishwasher was lost at any time during the remainder of the cycle that follows due to a door open...

Страница 46: ... the resistance of the thermistor is always less than 45 K OHMS and would not trigger the clean LED 7 The wash and drain auxiliary windings are only on when the motor is being started When the control has determined that the motor has been started satisfactorily the auxiliary winding will be turned off 8 Entering the key sequence high temp wash or power scour air dry high temp wash or power scour ...

Страница 47: ... chopper blade grinds the particles into smaller sizes that then pass through the perforated plate into the upper chamber of the pump The pump impeller causes the soil ladened water to be lifted and moved to the outer edges of the pump chamber where they are forced into the separator Clean water is then forced up through the spray arms and fine mesh screen Fig 3 1 3 When the drain cycle begins the...

Страница 48: ...r tube from the plastic knob on the back of the tub by pressing down on the nozzle Fig 3 5 3 Pull the securing tabs of the clamp holding the internal water feed tube to the pump outlet nozzle and remove the clamp Fig 3 6 4 Rotate the lower end of the tube either left or right off the pump nozzle Fig 3 7 Fig 3 4 Securing Tab Fig 3 5 Fig 3 7 Fig 3 6 Securing Tab Securing Tab Internal Water Tube Secu...

Страница 49: ...ystem The Soil Sensing System consists of a pressure sensitive switch connected to the dishwasher pump base Fig 3 8 The system detects excessive amounts of food soils during the sensing portion of the wash cycle and signals the electronic control board to either terminate the wash cycle and initiate drain to flush soils from the system or skip certain parts of the heavy soil cycle The pressure swi...

Страница 50: ...ching tabs in the wet agent cap opening Remove wet agent dispenser assembly Fig 3 12 6 Remove wet agent dispenser actuator by spreading the two 2 locking tabs Fig 3 13 7 Remove the actuator slide from the wet agent dispenser actuator 8 Remove the diaphragm spring and diaphragm 9 Use a screwdriver to gently release the lower tab and remove the detergent door actuator assembly As you do note the pos...

Страница 51: ...47 Fig 3 12 Fig 3 13 Fig 3 14 ...

Страница 52: ...ctuator into position on the dispenser so the lock ing tabs engage 6 Install the actuator slide into the wet agent dispenser actuator 7 Press the wet agent dispenser assembly into position so the locking tabs engage the wet agent cap opening No tool is needed for assembly Fig 3 12 8 Install the seal on the wet agent cap 9 Insert the wet agent cap Turn it clock wise and close it 10 Install the draw...

Страница 53: ... the resistance of the thermistor is always less than 45 K OHMS and would not trigger the clean LED 7 The wash and drain auxiliary windings are only on when the motor is being started When the control has determined that the motor has been started satisfactorily the auxiliary winding will be turned off 8 Entering the key sequence high temp wash or power scour air dry high temp wash or power scour ...

Страница 54: ...tion float is free to move up and down Check that the overfill switch in opening and closing properly 2 Check for continuity between contacts on fill valve 3 Check for 110VAC between P2 5 and P12 3 1 Follow air gap manufacturer s direction for cleaning 2 Disconnect pump motor from wiring harness and check for continuity between V BU V GY and V Y 3 Check for 110VAC between P10 and P3 P10 and P5 and...

Страница 55: ...ser Interface Pressure Switch Soil Sense Thermistor Thermostat Detergent Dispenser Rinse Agent Dispenser Fill Valve Motor Main Winding Motor Auxiliary Winding Wash Motor Auxiliary Winding Drain Switch L1 to Heater AC Neutral L1 Switched L1 to Vent Fill Valve Dual Dispenser Pressure Sw Switched L1 to Motor Common Wire Color O GY GY O O BK LBU BR BU Y GY W R W V T R BK P9 BU BK ...

Страница 56: ...52 STRIP CIRCUITS ...

Страница 57: ...53 STRIP CIRCUITS CYCLE TIMING CHART ...

Страница 58: ...icator is illuminated at the end of the cycle During a cycle in which sani rinse has been selected the target thermal hold temperature for the sani rinse option must be satisfied and maintained If this condition is not satisfied because the final rinse thermal hold default time elapsed or power to the dishwasher was lost at any time during the remainder of the cycle that follows due to a door open...

Страница 59: ... and a lower panel are cut and finished as described below use the materials in the Dishwasher Custom Panel Accessory Kit to install them by following the installation instructions Custom Panel Dimensions NOTE A thickness actual 7 32 can be used for wood panels If using thicker material edges must be routed to 7 32 as shown in box below 7 32 Max 1 Min Required on top and bottom edges 18 21 32 22 1...

Страница 60: ...notches 2 Using the end of a flat bladed screwdriver push in on the three 3 tabs to lock the mounting strip into place 3 Install the J strips by removing the protective strip from the adhesive backing and carefully positioning the J strips over the left and right door frames Fig 4 3 Peel off the protective film from the outside of the J strips after in stalling 4 Tip the custom door panel as shown...

Страница 61: ...f the access panel Press firmly on the forward edge of the retainer to snap it into place Fig 4 10 10 Refer to Fig 4 1 on page 71 Install the ac cess panel assembly to the dishwasher by aligning the slots in the back flange of the extension over the two 2 screw heads pro truding from the tow panel Slide the access panel downward and tighten the screws IMPORTANT Be sure the door panel is inserted i...

Страница 62: ...n tests again fail the heavy duty springs supplied must be used 3 Close and lock the dishwasher door Remove a spring from one side by releasing the lower hook from the adjustment slot first then disen gaging the upper hook from the door hinge bracket Fig 4 11 4 Install a heavy duty spring Insert the smaller hook through the door hinge bracket first then engage the larger hook in the first notch of...

Страница 63: ...stalled position 5 Place the floor mounting brackets so the top of the bracket hooks over the top of the dishwasher side brace towards the back of the unit Fig 4 14 6 Mark the location of the mounting holes on the floor 7 Remove the dishwasher and drill two 2 holes on each side of the dishwasher location 8 Position the dishwasher in its final installed position and install the floor mounting brack...

Страница 64: ...60 NOTES ...

Страница 65: ...V ...

Страница 66: ...VI ...

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