Danby DDW398W User manual

SERVICE MANUAL
COUNTER-TOP DISHWASHER
DDW398W,DDW399W
DANBY PRODUCTS LTD.
GUELPH, ONTARIO N1H6Z9
DANBY PRODUCTS INC.
FINDLAY, OH 45839

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. Timer___________________________________________________12
11. Power Switch and Option Switch_____________________________15
12. Water Inlet Valve_________________________________________16
13. Pressure Switches_________________________________________18
14. Pump and Motor Assembly__________________________________19
15. Heating Element and Safety Thermostat________________________20
16. Normal Thermostat________________________________________21
17. Hose Connector___________________________________________22
18. Rinse Agent Dispenser______________________________________23
19. Parts List_________________________________________________24
20. Exploded View____________________________________________29

1.Circuit Diagram
1.

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.
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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. Too little or no water fill Kinked fill hose Check inlet hose
Low houes water pressure check faucet
Blocked inlet valve or faucet Check inlet valve and faucet
Open or defective pressure switch See pressure switch
3. Water does not shut off Pressure switch defective See pressure switch
water inlet valve stuck open See inlet valve
4. Water pumping out before Pressure switch defective See pressure switch
washing dishes.
5. Timer does not advance Poor terminal connection on timer See timer
Defective timer See timer
6. Water does not pump out Drain hose kinked or blocked Check drain hose
Resistance or capacitance defect See pump and motor assembly
7. Dishwasher leaks Dishwasher not level Adjust leveling legs
Door not closing tightly Adjust latch strike
Crack in hose connection Replace hose
Gasket damaged Replace gasket
Inlet valve connector loose or defective Check water inlet valve
Loose connection between pump & sump Reconnect using encapsulant
Pump body damaged Replace pump and motor assembly
Pump seal defective See pump and motor assembly
8. Detergent remains in detergent
cup Detergent is old and caked See detergent and rinse agent
Dishes block water from detergent cup See loading dishes
No or low water See #2
9. Rinse agent dispenser does not No rinse agent in dispenser Check rinse agent level
release rinse agent Solenoid inoperative check rinse agent dispenser
Open timer contacts Check timer
10. Rinse agent dispenser leaks Dispenser gasket defective Replace gasket
Dispenser tank cracked Replace dispenser
11. Poor washing results Improper loading See loading dishes
Detergent old, incorrect type or amount See detergent and rinse agent
Improper cycle selection Choose proper cycle
Kinked or cloged drain hose Check drain hose
Foreign material in wash system Check wash system
Foreign material in spray arm Clean wash arm
Rinse agent leaks into tub during wash Replace dispenser
12. Poor drying Rinse agent not used Fill rinse agent dispenser
heating unit inoperative See heating element
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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
15. Noise during operation Dishes rattling See loading dishes
Drain pump viberating See pump and motor assembly
Foreign object in pump Check wash pump
16. Hose connector leaks Silcon sleeve worn See hose connectors
Connector hose washer defective Replace washer
Connector gasket damaged Replace connector gasket
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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. To get the best results from the dishwasher it is necessary to form good
loading habits. If the dishwasher seem to be running correctly, but does not get the dishes really clean, check to be
sure it is being loaded properly. The owner’s manual gives detailed instructions on this procedure.
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PROCEDURE
Loading dishwasher
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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.
PROCEDURE
Checking detergent
Step 1: For personal safety Step 2: Only use detergent intended Step 3: This dishwasher has a rinse
always exercise caution when specifically for automatic dishwashers. agent dispenser, make sure it is
working with any electrical Make sure the detergent is fresh and filled. The rinse agent makes the
appliance.. dry. Old, caked detergent will not water flow off the dishes faster, this
wash well. reduces spotting and aids drying.
NOTE: Check with the local water company concerning the water conditions in your area. With very hard water
more detergent may be required for good results. If you have soft water or a water softener, use less detergent.
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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.
CAUTION: To minimize the possibility of electric shock, be certain that the wall receptacle and circuit
are properly grounded before using the dishwasher. Use of a plug adapter to adapt to a two prong outlet is
NOT recommended. Under no circumstances should you attempt to cut off or otherwise remove the third
prong (ground prong) from the power cord..
PROCEDURE
Inspecting: Power Connections
Step 1: Be sure all dishwasher Step 2: Inspect power cord at Step 3: Pull plug from receptacle with
Controls are turned off connection to receptacle. Improper a firm quick tug. Always grasp the
connection could be the sole cause plug, never pull the cord. Be careful
of trouble. Not to contact the blades of plug.
Step 4: Inspect plug carefully for Step 5: To replace cord, disconnect remove
Damaged, corroded or loose terminals. mounting screws on power cord strain relief .
Look for signs of overheating around Disconnect internal connections and install
the molded portion. If plug is damaged new cord same as original. Reassemble
replace the power cord. dishwasher and check operation.
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