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300X Series Technical Manual 7610-002-64-22
Issued: 07-26-2006 Revised: N/A
SECTION 4: TROUBLESHOOTING
COMMON PROBLEMS
19
WARNING: Inspection, testing and repair of electrical equipment should only be performed by a qualified ser-
vice technician. Many of the tests require that the unit have power to it and live electrical components be
exposed. USE EXTREME CAUTION WHEN TESTING THE MACHINE.
Problem: Dishmachine will not fill after the door is close. Power “ON” light is illuminated.
1. Faulty rinse solenoid valve. Repair or replace valve as required.
2. Faulty door switch. Verify the wiring of the switch; if correct, replace the switch.
3. Fouled/faulty high level probe. Clean probe if fouled. If clean, and still not working, replace.
Problem: Dishmachine will not fill after the door is closed. Power “ON” light is not illuminated.
1. Service breaker tripped. Reset. If the breaker trips again, contact an electrician to verify the amp draw of the machine.
2. Machine not connected to power source. Verify that the machine has been properly connected to the power source.
3. Faulty power source. Verify the wiring of the switch; if correct, replace switch.
Problem: Dishmachine will not run after the door is closed. Power “ON” light is illuminated and the unit is filling.
1. Wash motor faulty/damaged. Verify that the wash motor is getting power. If so, replace the motor.
2. Wash motor contactor faulty. Check for continuity; if contacts are open, replace the contactor.
Problem: Dishmachine runs continuously in the wash cycle.
1. Machine is in Delime mode. Flip NORMAL/DELIME switch to NORMAL mode.
Problem: Wash or rinse heater does not work.
1. Faulty heater element. Check element for continuity; if open, replace the heater.
2. Faulty heater contactor. Replace the contactor.
3. Misadjusted/faulty thermostat(s). Verify operation and setting of thermostats, replace if necessary.
Problem: Dishmachine fill slowly and/or the rinse is weak.
1. Clogged or obstructed rinse arms. Remove and clean the rinse arms.
2. Low incoming water pressure. Adjust the water pressure regulator to ensure that there is 20 PSI flow.
3. Y-strainer is clogged. Clean out the Y-strainer.
Problem: Rinse water not reaching required temperature.
1. Faulty rinse heater. Check element for continuity; if open, replace heater.
2. Misadjusted/faulty thermostat(s). Verify operation and setting of thermostats, replace if necessary.
3. Rinse thermometer is defective. Replace thermometer.
Problem: Wash water is not reaching required temperature.
1. Faulty wash heater. Check element for continuity; if open, relace the heater.
2. Misadjusted/faulty thermostat(s). Verify operation and setting of thermostats, replace if necessary.
3. Wash thermometer is defective. Replace thermometer.