TABLE OF CONTENTS SAFE SERVICING PRACTICES ..................WHAT'S NEW ........................MODEL TECHNICAL SPECIFICATIONS................. Model Diagram Index ............................Electrical ................................ Water Supply ..............................Component Resistance (Ohms) ........................Temp Assure and Heat Delay Operation ...................... CONSTRUCTION AND OPERATION Water Distribution System ..........................Wash Pump ............................
SAFE SERVICING PRACTICES - ALL APPLIANCES To avoid personal injury and/or property damage, it is important that Safe Servicing Practices be observed. The following are some limited examples of safe practices: 1. DO NOT attempt a product repair if you have any doubts as to your ability to complete it in a safe and satisfactory manner.
WHAT'S NEW √ QUIETER OPERATION - Possible in part because only one spray arm operates at a time. Since only one spray arm is in motion at a time, a smaller, quieter, motor can be used to recirculate the water. √...
TECHNICAL SPECIFICATIONS For Models: GLDB957JB* ADW750EA* GLDB958JB* ADW850EA* GPDB998JC* * = Color Code WATER SUPPLY DIAGRAM INDEX MODEL CYCLE WIRING Suggested Min. Water 120° F NUMBER CHART DIAGRAM Temperature GLDB957JB* B - 1 B - 1 Pressure (PSI) 20/120 Minimum/Maximum...
CONSTRUCTION & OPERATION WATER DISTRIBUTION SYSTEM Not all of the water is blocked however. The opening is constructed to allow a small amount of water to bypass The water distribution system consists of an upper and the ball and enter the tube, and fills the tube at a rate of lower spray arm, upper (spray) arm delivery tube, filter, approximately four inches a second.
Different Types of Precision Wash Motors Emerson Motor with Aluminum Motor Mount ASKO Motor - Phase III ASKO Motor - Phase II Emerson Motor with Phase Mounting Bracket Page 8...
Drain Pump Upper Spray Arm The drain pump has only one function, to remove water The upper spray arm hangs from a bracket that is from the dishwasher. The drain pump is driven by a 1/ snapped to the bottom of the upper rack. The water is HP drive motor.
The door vent actuator opens the vent only during the When the timer enters the dry cycle, 120 VAC is applied dry cycle. It is closed during all other cycles to minimize to the wax motor. The wax motor is made up of a heating heat loss and to prevent noise from being transmitted disk, fluid chamber and piston.
DISPENSING SYSTEM DOOR LATCH ASSEMBLY Detergent & Rinse Aid Dispenser The door latch assembly has two functions, one is to lock the door in a closed position and the other is to The detergent and rinse aid dispenser consists of two operate the door switches.
ELECTRONIC CONTROL AND THERMISTOR 130°F in the final rinse cycle). "Temp Assure" occurs near the end of the third wash cycle and near the end of There are three styles of electronic controls used in the the second rinse cycle. When the thermistor senses Precision Wash System dishwashers.
TEMPERATURE CONTROLS WITH THERMISTER OPTIONS • The Thermister controls the temperature inside the HI-TEMP WASH - Selects both the wash dishwasher (Solid State only, depending on what cycle temperature delay which is 140°F and the rinse is selected and what other options are selected). temperature delay which is 145°F.
cause a leak down onto the floor. Another leak possibility WARNING: WHEN UNPLUGGING THE JUMPER is an missing or damaged "O" ring that fits over top of WIRE THAT YOU USED, MAKE SURE YOU TURN the covered sensing light of the sensor. OFF THE POWER SUPPLY FIRST, UNHOOK The sensor will not function in the following cycles: THE TWO WIRES TO THE JUMPER, THEN...
DISASSEMBLY SAFETY PRECAUTIONS 5. Remove cycle selector knob from face of control panel. See "Selector Switch." Always turn off the electric power supply before 6. Peal overlay and keypad away from front of servicing any electrical component, making ohmmeter control panel. checks, or making any parts replacement.
WATER DISTRIBUTOR 1. The water distributor is screwed to top of upper arm delivery tube. A rubber seal is used on top side of tub to eliminate leaks. 2. Each rack roller is each secured with a T-25 TORX bolt. ®...
FLOAT SWITCH AND BRACKET 2. Remove outer door panel and kick plate. 3. Remove hoses and wiring to drain pump. 1. Disconnect dishwasher from electrical supply. 4. Remove two screws securing drain pump 2. To remove float switch bracket, remove outer to mounting bracket.
LOWER SPRAY ARM 1. To remove lower spray arm, pull out on retaining clips and lift up. GLASS TRAP 1. To remove glass trap, lift handle up and raise trap up and out of sump. PUMP AND MOTOR ASSEMBLY 1. To remove pump and motor assembly, discon- nect dishwasher from electrical supply.
MOTOR MOUNTING BRACKET Note: When removing or replacing the thermistor, make sure to apply more thermal mastic to 1. Disconnect dishwasher from electrical supply. the face of the thermistor. 2. To remove motor mounting bracket, remove Thermistor pump and motor assembly. 3.
TROUBLESHOOTING TIPS SYMPTOM CHECK THE FOLLOWING REMEDY Dishwasher will not operate 1. Fuse (blown or tripped). 1. Replace fuse or reset breaker. when turned on. 2. 120 VAC supply wiring 2. Repair or replace wire connection faulty. fasteners at dishwasher junction box.
Page 24
SYMPTOM CHECK THE FOLLOWING REMEDY Dishwasher will not pump out. 1. Drain restricted. 1. Clear restrictions. 2. Defective drain pump. 2. Replace pump. 3. Air lock in drain hose. 3. Drain hose must slope upward to side of tub. Hose must be attached on side of tub.
TROUBLESHOOTING DIAGNOSTICS PROBLEM PAGE Low Water Level ............25 Low Water Temperature..........26 Door Leaks ..............27 Dishes are Not Clean ..........28 Steam Comes from Vent During Wash Cycle ..... 29 Some Functions of the Control Panel Will Not Program ............30 Dishwasher is Completely Inoperative ......
Low Water Level Possible component failure: 1. Low water pressure 2. Dirty inlet valve screen Low Water Level Below 20 psi Check water pressure to dishwasher Increase water pressure. Above 20 psi. Clean water inlet valve screen. Page 25...
Low Water Temperature Below 120°F What is the incoming water temperature? Raise water temperature to Above 120°F dishwasher. With the dishwasher operating in short wash is the heater heating? Go to flow chart "Dishes Are Not Dry." With the dishwasher operating in Zero short wash, measure the voltage across the thermistor.
Door Leaks Possible component failure: 1. Door seal 2. Door latch 3. Door hinge Note: There are no adjustments to the door or latch. Door Leaks Remove the door panel, drop the control panel and inspect the door latch, door strike, and door hinge.
Dishes Are Not Clean Possible component failure: 1. Low water level (see flow chart "Low Water Level") 2. Spray arms not alternating (Run diagnostic test) 3. Low water temperature 4. Blocked spray arm 5. Bad detergent 6. Hard water Page 28...
Steam Comes From the Vent During Wash Cycle Possible component failure: 1. Vent valve 2. Vent mechanism Steam Comes From the Vent During Wash Cycle Open the control panel and remove the vent mechanism. Is the valve in place on the actuator arm? Replace the vent Snap the valve back mechanism.
Some Functions of the Control Panel Will Not Program Possible component failure: 1. Control board 2. Touch pad Some Functions of the Control Panel Will Not Program Remove the touch pad ribbon from the board, clean the ribbon tail, reinstall the ribbon. Check the dishwasher operation.
Dishwasher is Completely Inoperative Possible component failure: 1. Power to the dishwasher 2. Transformer 3. Control board 4. Touch pad 5. Line side door switch 6. Wiring between these components P3 - 5 P1 - 3 P1 - 4 Page 31...
Page 33
Dishwasher is Completely Inoperative With the door latched remove and reapply electrical power to the dishwasher. Does the HI-TEMP WASH & NO HEAT DRY LEDs FLASH? Go to "Some Functions Will Not Program" flow chart. Zero Measure input voltage to the transformer. 120 VAC Check power to dishwasher.
Display Will Not Illuminate Possible component failure: 1. Control Board 2. Display P3 - 5 Display Will Not Illuminate Measure the voltage between Zero 5 VDC the two outside pins of the display plug. Defective control Defective board Display. Page 33...
Dishwasher Operates in Normal Wash No Matter What Cycle is Selected (Selectronic models only) Possible component failure: 1. Control board 2. Cycle selector control P3 - 5 Page 34...
Page 36
Dishwasher Operates in Normal Wash No Matter What Cycle is Selected (Selectronic models only). Set the selector to "Pots & Pans." Drop the Infinity control panel, unplug the cycle selector control from the control board. Measure the resistance between pins 1 and 3 in the plug. Defective cycle 47,000 Ohms selector control.
Page 38
Dishwasher Overfills Is it necessary to turn the incoming water off to stop water from entering the tub? Defective water inlet valve. Cancel and restart a normal wash program. Does the water pump out all but a small amount in the bottom of the pump cavity? Refer to "Dishwasher Will Not Drain"...
Dishwasher Will Not Fill Possible component failure: 1. Water supply 2. Control board 3. Float switch 4. Inlet valve FLOAT WATER SWITCH VALVE 699 OHMS Page 38...
Page 40
Dishwasher Will Not Fill Is the water supply turned Turn water supply on. 120 VAC on one Remove the door panel and terminal 0 volts on 120 VAC on kick plate. Run the diagnostic the other both terminals test for a fill and with a voltmeter measure the voltage drop between each terminal of the float switch and neutral.
Dishwasher Will Not Drain Possible component failure: 1. Control board 2. Drain pump 3. Drain pump stator winding 4. Crossover hose 5. Restricted drain hose DRAIN MOTOR 28 OHMS Page 40...
Page 42
Dishwasher Will Not Drain Run the diagnostic test for drain. Does the drain pump run? Check for restricted drain hose, pinched crossover hose, or Remove the door panel and kick plate. plugged pump. Remove electrical power and disconnect the two wires from the drain pump. Apply electrical power, run the diagnostic test for drain and measure the voltage drop between the two wires.
Detergent Dispenser Does Not Open Possible component failure: 1. Control board 2. Dispenser P3-2 Detergent Dispenser Does Not Open Remove the door panel. Run the diagnostic test for dispenser. 120 VAC 0 VAC Measure the voltage drop across the terminals of the dispenser actuator. Defective control Defective board or broken...
Dishes Are Not Dry Possible component failure: 1. Heater 2. Hi-limit thermostat 3. Control board 4. Vent mechanism 5. Blower 6. Hot or cool dry switch P3 - 2 Page 43...
Page 45
NOTE: This dishwasher will not operate properly unless the incoming Dishes Are Not Dry water temperature is above 120°F. Is the heat dry switch on? Turn switch to "ON." Run diagnostic test for heater, vent and blower. Does the heating element heat. Is the vent Remove the door panel and valve open.
Wash Pump Motor Does Not Run Possible component failure: 1. Control board 2. Wash pump motor PUMP MOTOR 4.9 OHMS Page 45...
Page 47
Wash Pump Motor Does Not Remove the door panel and kick plate. Disconnect the electrical plug from the 0 Volts wash motor. Run the diagnostic test for the wash motor and measure the voltage drop between the blue and white wires. Defective control board or broken wire.
Page 63
APPENDIX B SERVICE DATA SHEETS MODEL SERVICE DATA SHEET # PAGE GLDB957JB* 154371501 B - 1 GLDB958JB* 154371501 B - 1 GPDB988JC* 154371501 B - 1 ADW750EA* 154390601 B - 2 ADW850EA* 154390601 B - 2...
Page 64
Operation Color Code 9v†ƒyh’Ã8‚qr†ÃSrhq‚ˆ‡ 9v†ƒyh’Ã8‚qr†ÃG@9 ..Low liquid in the rinse aid dispenser ---------------------- Turbidity sensor is checking the condition of the wash/rinse water. T@ITD IB No sensing for LIGHT WASH (UPPER RACK), LIGHT WASH (LOWER RACK) and CHINA/CRYSTAL. BK......Black ..A power failure has occurred ----------------------Wash portion of cycle.
Page 65
Operation Color Code 9v†ƒyh’Ã8‚qr†ÃSrhq‚ˆ‡ 9v†ƒyh’Ã8‚qr†ÃG@9 † ---------------------- Turbidity sensor is checking the condition of the wash/rinse water..Low liquid in the rinse aid dispenser T@ITD IB … v No sensing for SAVER CYCLE. BK......Black ..A power failure has occurred ----------------------Wash portion of cycle.