SECTION 4: TROUBLESHOOTING
COMMON PROBLEMS
Problem: Low wash water pressure at wash arm spray nozzles.
1.Pump impeller worn or broken. Replace pump.
2.Clogged jets in wash arms. Clean out wash arms.
3.Float stuck on float switch. Remove, clean and reinstall float switch.
4.Water level too low in the wash tank. Ensure that the incoming water line flow pressure meets the requirements on the dish- machine data plate.
Problem: Machine keeps tripping service breaker.
1.Power supply shorted to ground. Check for loose wires/burned connection. Replace or repair as required.
2.Pump impeller jammed. Disassembly and remove obstruction.
3.Wash pump motor faulty. Check motor voltage and amp draw.
4.Service breaker too small. Replace with correctly sized breaker.
Problem: Machine will not hold water.
1.Drain stopper not in place. Set drain stopper correctly in drain.
2.Drain fitting
3.Drain stopper bent or deformed. Replace.
Problem: Sanitizer pump runs continuously.
1.Shorted prime switch. If there is not line voltage between BLACK/YELLOW and ORANGE/BLUE wires to prime switch, replace.
2.Faulty speed control board. Check operation of board. If not working properly, replace.
Problem: Sanitizer pump does not run during cycle, but runs when primed. Even when turntable is off.
1.Loose or broken wire. Replace or tighten.
2.Faulty speed control board. Check operation of board. If not working properly, replace.
3.Faulty prime switch. Check continuity through each pole of the speed control board. If it fails, replace the speed control board.
Problem: Prime switch does not activate sanitizer pump.
1.Faulty prime switch. With the prime switch in the prime position, check for voltage between BLACK/YELLOW and ORANGE/BLUE wires. If line voltage, replace switch.
2.Loose wire to prime switch. Tighten wire connection.
Problem: Sanitizer pump doesn't run during cycle or through prime switch.
1. Loose motor terminal wires. Tighten connections.
Problem: Sanitizer pump doesn't run during cycle or through prime switch.
1.Faulty sanitizer pump motor. If you read line voltage at the sanitizer motor terminals during the sanitizer feed cycle, replace the motor.
2.Faulty prime switch. Check the continuity through each pole of the switch. If faulty, replace the speed control board.
Problem: Detergent not feeding, rinse aid feeds okay.
1.Faulty speed control board. Check operation of board. If not working properly, replace.
2.Defective hose or squeeze tube. Replace hose or squeeze tube as needed.
3.Machine not in fill mode. Normal operation.
Delta 1200 Technical Manual
Issued:
14