6-5TROUBLESHOOTING CHARTPROBLEM POSSIBLE CAUSE SOLUTIONNOTES:1. For “Keypad Checks,” refer to “Checking Keypad Operation” on page 6-3.2. For “Resistance Checks,” refer to the strip circuits, starting on page 7-2.3. For “Checking Operation With Diagnostics,” refer to “Diagnostics Cycles” on page 6-1.Also refer to “Rapid Advance Service Feature” on standard cycles on page 6-1.4. For information on Normal cycles and options, refer to the “Normal Cycle Operation Chart” onpage 6-4.Will not run or power up.- No operation- No Keypad Response- No LEDs or DisplayWill not run and LEDs areblinking.Will not start.1. No power to unit or bad con-nection.2. Loose connections in dish-washer power up circuit orbetween keypad(s) and con-trol.3. Door switch not making con-tact, due to faulty door latchassembly, or door switch.1. Stuck key(s) or shortedcircuit(s) in keypad.2. Shorted circuits or connectionson the control that read thekeys.1. Door switch not making con-tact, due to faulty door latchassembly, or door switch.1. Check the fuses, circuit breakers, andjunction box connections.2. Check the resistance of all connectionsin the power up circuit to the control, andthe connections between the keypad(s)and the control.3. Measure the resistance of the doorswitch contacts while checking the me-chanical operation of the latch assembly.Confirm that the switches are not loosefrom the assembly.4. Measure the resistance. If open, replacethe TCO. If replaced more than once,replace the harness. NOTE: Replaceany component that has evidence ofoverheating.5. Check the keypad.1. Check the keypad.1. Measure the resistance of the doorswitch contacts while checking the me-chanical operation of the latch assembly.Confirm the switches are not loose fromthe assembly.2. Check the resistance of all the harnessconnections between the door switchesand pin 8 of the control.3. Confirm customer pressing proper key.If yes, then check keypad. If keypadokay, then check control.4. Blown TCO attached to con-trol.5. Multiple open or shorted cir-cuits in keypad.6. Faulty control. 6. Check the control.2. Check the control.2. Loose connections betweendoor switches and pin 8 oncontrol.3. Control not receiving Start key(or Cycle key, if model has noStart key).