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Summary of Contents for Danby DDW398W
- Page 1 SERVICE MANUAL COUNTER-TOP DISHWASHER DDW398W,DDW399W DANBY PRODUCTS LTD. GUELPH, ONTARIO N1H6Z9 DANBY PRODUCTS INC. FINDLAY, OH 45839...
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Page 2: Table Of Contents
Contents 1. Circuit Diagram___________________________________________1 2. Tools and Test Equipment___________________________________2 3. Troubleshooting___________________________________________3 4. Performance Check: Loading_________________________________5 5. Performance Check: Detergent and Rinse Agent__________________7 6. Power Connections_________________________________________8 7. Removing Outer Casing and Control Panel______________________9 8. Inner Wiring Connections Check______________________________10 9. Door Latch Mechanical_____________________________________11 10. -
Page 3: Circuit Diagram
1.Circuit Diagram... -
Page 4: Tools And Test Equipment
2. Tools and Test Equipment Hand Tools A basic compliment of hand tools i.e. flat and phillips head screw drivers, socket set, pliers and wire striper / crimping tool. A basic volt ohm meter (VOM) will also be required for circuit and component testing. -
Page 5: Troubleshooting
3. Troubleshooting Problem Possible Cause Repair Procedure 1.Pump and timer do not run Power receptacle defective Check receptacle (power pilot is not illuminated) Power cord defective Check power cord Open wire to timer Check timer Open door latch switch Check wiring and connection Power switch defective Check option switch and power switch 2. - Page 6 3. Troubleshooting Cont. Problem Possible Cause Repair Procedure 13. Condensation on door Some condensation is normal Cause- steam vent on door 14. Dishwasher door is difficult to Door gasket emersion Pull gasket into slot open or close Door linkage bent See door latch assembly Door hook deflection See door latch assembly...
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Page 7: Performance Check: Loading
4. Performance Check: Loading Many performance problems that commonly occur in dishwashers are not due to mechanical defects. Problems with poor washing results can often be resolved without making repairs. The procedures in this manual are designed to help you eliminate performance problems before you begin checking and testing the dishwasher’s components. - Page 8 PROCEDURE Loading dishwasher...
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Page 9: Performance Check: Detergent And Rinse Agent
5. Performance Check: Detergent and rinsing agent Water and detergent are major factors for good dishwasher performance. Water pressure, hardness and temperature also play vital roles in getting good results. The correct detergent, in proper amounts, is equally important. The water hardness in your area will effect the amount of detergent needed to get clean dishes. -
Page 10: Power Connections
6. Power Connections Dishwashers plug into standard 120 volt wall receptacles with a three pronged (grounded) plug. If the dishwasher fails to operate properly, the power cord may be preventing power from reaching the unit. Most problems associated with the power cord or connection are caused by damage and/or loose connections and will likely be visible. -
Page 11: Removing Outer Casing And Control Panel
7. Removing Outer Casing And Control Panel 7. Removing Outer Casing And Control Panel PROCEDURE Removing outer case Step 1: For your personal safety Step 2:Remove stainless--steel screws Step 3:Open door and remove six exercise caution when working with on both sides of outer casing. Screws on left and top edges of any electrical appliance. -
Page 12: Inner Wiring Connections Check
8. Inner Wiring Connections Check Power is carried to the components of the dishwasher by a network of insulated wires. These wires are connected to the timer, switches and other dishwasher components by means of push-on connectors. It is very important that the wiring be free of any damage. Any cut that reduces the diameter of the wire reduces the amount of power it will carry. -
Page 13: Door Latch Mechanical
9. Door Latch The door latch is essential to the operation of the dishwasher. Latching the door closes a switch allowing electrical current to flow to the timer. The timer controls all other components. If the door latch switch is open, the dishwasher will not operate. The latch switch cannot be activated while the door is open. -
Page 14: Timer
10.Timer The dishwasher timer consists of a timer motor and a variety of switches that automatically controls every phase of the dishwashers operation. The timer motor runs at a constant speed, like a clock. As it advances through the selected cycle, the timer’s internal switches open and close in a precise sequence. - Page 15 PROCEDURE Inspecting and replacing timer (Continued) Step 5:Remove the leads from the Step 6:To remove the timer, remove Step 7:Move leads terminal for Terminals to be checked. Using an the two timer mounting screws. terminal to the new timer. ohm meter, check the resistance through the contact while turning the timer.
- Page 16 Timer : Cam Timing Chart...
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Page 17: Power Switch And Option Switch
11. Power switch and option switch When you press the power switch on, and the dishwasher remains dead with no power light this may be a malfunction of the power switch. When you press the option switch and the heating element can not be energized and the Sani/Econo light does not come on, this may be a malfunction of the option switch. -
Page 18: Water Inlet Valve
12.Water inlet valve The water inlet valve controls the flow of water into the dishwasher. A solenoid coil attached to the valve housing creates a magnetic field when energized. This magnetic field pulls open a plunger inside the valve allowing the water to flow through and into the dishwasher. - Page 19 PROCEDURE Inspecting and replacing: Water inlet valve (continued) Step 7: Disconnect incomming water Step 8: Remove mounting screw that Water supply hose. Remove clamp secures fill valve to rear panel. Install and detach smaller hose running into new valve and reconnect leads and dishwasher tub.
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Page 20: Pressure Switches
13. Pressure Switches There are two pressure switches on the dishwasher. One is for controlling normal water level set at approx. 85mm or 3.5 inches of water in sump. This will be referred to as the Normal Pressure Switch. The other one is for preventing overflow and is set for approx. -
Page 21: Pump And Motor Assembly
14. Pump and Motor Assembly The circulation pump and drain pump are combined and driven by the same reversing motor. The timer activates the circulation winding during wash and the drain winding during pumpout with pauses between changes in direction. PROCEDURE Inspecting and replacing: Pump and motor assembly Step 1: Be sure all controls are... -
Page 22: Heating Element And Safety Thermostat
15. Heating Element and Safety Thermostat The heating element is located at the bottom of the sump. When the unit is energized during the heated wash cycle , it heats the water. The warmed air rises through the sump cover into the tub providing efficient washing and drying of the dishes. -
Page 23: Normal Thermostat
16. Normal Thermostat The normal thermostat is used to control the water temperature during the wash and final rinse when the sani option is selected. When the sani option is selected, the timer stops at specific points in the cycle and the heating element is energized. -
Page 24: Hose Connector
17. Hose Connector The hose assembly is made up of a water inlet hose, a drain hose and a hose connector. The hose connector fastens to the kitchen faucet by means of a faucet adapter. The hose connector also has a pressure relief button to relieve pressure before disconnecting and allows water to be used in the sink while the dishwasher is operating. -
Page 25: Rinse Agent Dispenser
18. Rinse Agent Dispenser The rinse agent dispenser on dishwashers automatically inject a small amount of liquid rinse agent into the dishwasher during the final rinse cycle. This wetting solution acts to break down the surface tension of the water, minimizing the formation of spots and streaks on dishes and glasses. -
Page 26: Parts List
Ilus Description Qty Per Part Unit Door Spring 1.398 Front Cover Facing Bar 2.398 Filter Assembly 3.398 Outer Casing 4.398 Outer Casing Screw 5.398 Absorbtion Proofed Connecting Hose 6.398 Clamp 24 7.398 Name Plate 8.398 Inlet Hose 9.398 Clamp 16 10.398 Spray Arm Assembly 11.398... - Page 27 Ilus Description Qty Per Part Unit Pressure Switch Connector 42.398 Pressure Switch Connector Hose 43.398 Clamp 22 44.398 Thermostat #2 Gasket 45.398 Pressure Switch Connector Hose #2 46.398 Spray arm hose 47.398 Circulation outlet gasket 48.398 Circulation pump 49.398 Circulation wheel 50.398 Diaphragm 51.398...
- Page 28 Ilus Description Qty Per Part Unit Right rear bracing bar 83.398 Dispenser gasket 84.398 Dispenser solenoid 85.398 Dispenser cover #1 86.398 Dispenser mounting screw 87.398 Dispenser cover #2 88.398 Dispenser body assembly 89.398 Door lock holder 90.398 Slider 91.398 Door lock spring #1 92.398 Spring #1 washer 93.398...
- Page 29 Ilus Description Qty Per Part Unit Pilot 124.398 Power switch 125.398 Option switch 126.398 Timer 127.398 Door lock button spring 128.398 Cross recessed pan head 129.398 Tapping screw Cross recessed big pan head 130.398 Tapping screw Cross recessed big pan head 131.398 Tapping screw Cross recessed big pan head...
- Page 30 Ilus Description Qty Per Part Unit Cross recessed pan head tapping screw 153.398 Cross recessed pan head tapping screw 154.398 Cross recessed pan head tapping screw 155.398 Cross recessed pan head tapping screw 156.398 Cross recessed pan head screw 157.398 Cross recessed pan head forming screw 158.398 Cross recessed pan head tapping screw...