SECTION 4: TROUBLESHOOTING SECTION
COMMON PROBLEMS
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 run. No power to the unit.
1.Service breaker tripped. Reset breaker. If breaker trips again, immediately contact an electrician.
2.Incoming power lines not installed in control box. Install power lines.
3.Incoming power lines connections not tightened. Tighten connections.
Problem: Dishmachine will not run. There is power to the unit.
1.Door switch shorted out or is disconnected. Check to ensure door switch wires are connected correctly. If so, replace door switch.
2.Faulty “ON/OFF” switch. Ensure switch is wired properly. If so, replace switch.
3.Solid state timer, faulty. Check wiring, replace if necessary.
Problem: Machine runs, but there is no water.
1.No water supply to the machine. Check to ensure that all water valves are open and that water is being supplied to the machine at 20A5 PSI.
2.Incoming water supply solenoid not operating. Check to ensure that valve is wired correctly. If so, replace valve.
Problem: Dishmachine fills continuously, even with no power to the machine.
1.Incoming water supply solenoid not operating. (Stuck Open) Check to ensure that valve is wired correctly. If so, replace valve.
Problem: Dishmachine fills continuously, only when the power is on.
1.Incoming water supply solenoid not operating. Check to ensure that valve is wired correctly. If so, replace valve.
2.Faulty solid state timer. Check wiring, replace if necessary.
3.Shorted out ON/FILL switch. Check the voltage across the switch. If the voltage is incorrect, replace the switch.
4.Shorted/defective liquid level control board or probe. Check voltage going to each component and ensure they are wired correctly. If satisfactory, replace the defective part.
Problem: Dishmachine runs with the door open.
1.Door switch shorted out/wired incorrectly. Check the wiring of the door switch. If correct, replace the door switch.
2.Faulty wash relay (wash relay welded closed). Turn machine off, if wash relay doesn’t release, replace contactor.
Problem: Low wash water pressure.
1.Water level is too low. Check to ensure that the drain stopper is in and has an
2.Pump intake strainer is clogged. Remove and clean strainer.
3.Wash arms (nozzles) are clogged. Remove wash arms and clean.
Problem: Low wash water pressure.
1.Pump impeller worn or broken. Replace pump.
2.Obstruction in wash arm or wash arm nozzle. Remove and clean.
3.Wash arm not secured into manifold. Wash arm assembly should lock into into place.
200 Series Technical Manual
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