W10750907 Rev B1

W10750907 B

Fuse Service Check:

F9 = Small-triac load fuse.

Check operation of loads during the Service Diagnostics cycle.

• ■ If any of the triac loads work, F9 fuse is OK.
• ■ If all triac loads fail to work, F9 fuse could be open. See 'Fuse Resistance Check.'

FOR SERVICE TECHNICIAN'S USE ONLY

NOTE: This sheet contains important Technical Service Data.

Tech Sheet

Do Not Remove Or Destroy

WARNING

Electrical Shock Hazard

Disconnect power before servicing.

Replace all parts and panels before operating.

Failure to do so can result in death or electrical shock.

DANGER

Electrical Shock Hazard

Only authorized technicians should perform diagnostic voltage measurements.

After performing voltage measurements, disconnect power before servicing.

Failure to follow these instructions can result in death or electrical shock.

Voltage Measurement Safety Information

When performing live voltage measurements, you must do the following:

• ■ Verify the controls are in the off position so that the appliance does not start when energized.
• ■ Allow enough space to perform the voltage measurements without obstructions.
• ■ Keep other people a safe distance away from the appliance to prevent potential injury.
• ■ Always use the proper testing equipment.
• ■ After voltage measurements, always disconnect power before servicing.

SPECIFICATIONS

Electrical Supply:

(Under load) 60 Hz, 120 VAC

Lower Spray Arm Rotation:

12 to 40 rpm

Supply Water Flow Rate:

To fill 2 qt (1.9 L) in 27 seconds, 120 psi maximum, 20 psi minimum.

Upper Spray Arm Rotation:

12 to 30 rpm

Supply Water Temperature:

120°F (49°C) (Before starting a cycle, run water from sink faucet until hot.)

REPAIR KITS

Water Charge:

1.0 gal. (3.9 L) Approximate

Vinyl Touch-up Kits:

675576 (Blue), 676453 (White), 676455 (Gray)

Meter Check of Loads and Fuses

Fuse Resistance Check:

1. Unplug the dishwasher or disconnect power.
2. Measure resistance of F9 fuse.

NOTE: Fuses are on the bottom of the Control Board but can be checked from the top side. See 'Control Pinout' diagram.

• ■ If resistance is < 3 Ω , then fuse is OK.
• ■ If resistance is > 3 Ω , then fuse is open.

What To Do If Fuse Open:

Inspect and check resistance of all loads on fuse. If any loads are open, shorted, or have evidence of overheating or pinched wires, replace them.

Wiring Diagram

Schematic shown with door switch and all other normally-open contacts open. *Denotes energy-efficient components. Do not substitute.

Wax Motor

Service Diagnostics Notes:

• 1 To invoke the Diagnostics Cycle, perform the following while in standby:
• ■ Press any 3 keys in the sequence 1-2-3-1-2-3-1-2-3 with no more than 1 second between key presses.
• ■ The Service Diagnostics Cycle will start when the door is closed.
• ■ To rapid advance 1 interval at a time, press the START/RESUME key. Rapid advance may skip sensor checks as some checks require 2 complete intervals.

NOTE: While you are in the Diagnostic Cycle, the Start/Resume feature is turned Off (for example, Auto Resume after door interrupts) and the Start/Resume key becomes an interval advance key.

• ■ Invoking Service Diagnostics Cycle clears all status and last run information from memory and restores defaults. It also forces the next cycle to be a sensor calibration cycle.
• ■ Drain and wash motors will pulsate on and off.
• ■ Last run cycles and options returned to default.
• ■ Last run Delay returns to the lowest delay increment.
• ■ Calibration cycle may force an extra rinse to occur prior to Final Rinse (to assure clear water), and then calibrates the OWI and the fill amount during the final rinse.
• ■ Operating state returns to Standby upon completing or terminating the Service Diagnostics Cycle.
• 2 Turn on all LEDs immediately upon receiving the entry sequence (even if the door is open) for 5 seconds as a display test. Turn off all LEDs for 1 second prior to reporting customer error history.

3. Diverter will be on continuously in intervals 14 and 15. In all other diverter intervals, diverter will be on only until it reaches the intended position for that interval.

• 4 Press HI TEMP key in this interval to clear customer error history.
• 5 Thermistor (temperature sensor) checks - turn clean LED on if thermistor is in its normal temperature range (32°F to 167°F [0°C to 75°C]). Turn sanitized LED on if fill temperature is above 85°F (29°C).
• 6 OWI (optical soil sensor) checks:
• ■ Check OWI sensor for the presence of water, during the 5-second pause in interval 16, and turn on the Clean LED in interval 15, if water detected.
• ■ Check OWI sensor for presence of bulk soil during pause interval 13, and turn on the Clean LED in interval 12, if bulk soil detected.
• ■ Drain until OWI sensor sees the presence of air, or a maximum of 1:52 during interval 5, and turn on the Clean LED in interval 4, if air detected.
• 7 DC Fan Motor may be on during upper rack washing intervals to reduce moisture buildup in door.
• 8 Turn on Clean LED in this interval to indicate that vent current is detected.

Customer Cycle Operation

To quickly advance through customer cycles, invoke the Rapid Advance mode by pressing HIGH TEMP - HEATED DRY - HIGH TEMP - HEATED DRY, after starting the cycle. Then, press START/RESUME to advance through cycle intervals.

NOTE: Rapid Advance mode is automatically enabled in the Service Diagnostic cycle but must be manually invoked in customer cycles.

Meter Check of Loads and Fuses

Dishwasher Strip Circuits

The following individual circuits are for use in diagnoses. Do not continue with the diagnosis of the appliance if a fuse is blown, a circuit breaker is tripped, or if there is less than a 120-volt power supply at the wall outlet.

Door Switch

Wash/Rinse

Water Heating/Heat Dry and Water Sensing with O.W.I. Sensor (Water/Air/Soil/Temperature)

Pump is washing and control monitors temperature during water heating periods. See 'Wash/Rinse' and 'Water Sensing with O.W.I. Sensor