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Replace if necessary. Problem: Machine fills, but fill is weak. 1. Low incoming water pressure. Verify that incoming water pressure during fill is 20 ±5 PSI. 2. Incoming water solenoid is clogged. Verify that debris is not entrapped in valve. If so, remove debris. Problem: Low wash tank temperature. 1. Low incoming water temperature. Verify that the incoming water temperature matches what is indicated on the machine data plate. 2. Heater not energizing. Verify that the wash tank heater is operating. If not, replace. 3. Low incoming voltage. Have an electrician verify that the power coming to the machine is the same as indicated on the data plate. Problem: Low wash arm pressure, poor spray pattern. 1. Clogged wash arm nozzles. Verify that nozzles are not clogged with debris. If so, remove debris. 2. Clogged wash tank or wash pump strainers. Clean out strainers if necessary. 3. Worn wash pump impeller. Verify status of impeller, replace if necessary. Problem: Low prewash arm pressure, poor spray pattern. 1. Clogged prewash arm nozzles. Verify that nozzles are not clogged with debris. If so, remove debris. 2. Clogged prewash tank or prewash pump strainers. Clean out strainers if necessary. 3. Worn prewash pump impeller. Verify status of impeller, replace if necessary. Problem: Inadequate rinse. 1. Low incoming water pressure. Verify that incoming water pressure during fill is 20 ±5 PSI. 2. Incoming water solenoid is clogged. Verify that debris is not entrapped in valve. If so, remove debris. Problem: Pawl bar moves with no load, but does not move when loaded. 1. Clutch on drive assembly is out of adjustment. Adjust as required. AJ-64 Conveyor Series Technical Manual 7610-003-30-93 Issued: 05-02-2006 Revised: N/A 50 SECTION 4: TROUBLESHOOTING COMMON PROBLEMS Problem: Pawl bar does not move. 1. Failed or broken overload spring. Replace spring if necessary. 2. No power to the drive motor/failed drive motor. Verify power and wiring connections to the motor. If necessary, replace the motor. 3. Pawl bar not properly installed. Verify that the pawl bar is installed correctly. Problem: Racks go through the machine, but results are poor. 1. Verify that detergent is being dispensed into the machine at the appropriate quantities for the water volume. If not, get detergent to appropriate level and review results of washing ware. 2. Clogged strainers/scrap basket. Clean out strainers and scrap basket and replace. 3. Ware not being properly prescrapped. Review paragraph entitled “Ware Preparation” in Operating Instructions. 4. Wash or rinse arms missing end plugs or caps. Verify and replace as required. 5. Low tank heat. 6. Inadequate rinse. 7. Incorrect voltage coming to the machine. Verify that the voltage matches that on the machine data plate. 8. Wash pump cavitation due to low water level. Verify that the drains are shut and that the water level is correct. Problem: Spotting of silverware, glasses and dishes. 1. Incorrect final rinse temperature. Verify that the rinse water temperature matches that which is listed on the machine data plate. 2. Clogged wash and/or rinse nozzles and arms. Remove the arms and verify that they and their nozzles are from debris. 3. Excessively hard water. Install a water softener to reduce hardness. 4. Loss of water pressure due to clogged/obstructed wash pump. Turn the power off to the machine at the source. Drain the wash tank of water and verify that the pump intake is free from debris. 5. Improper scrapping procedures. Review the paragraph entitled “Ware Preparation” in Operating Instructions. 6. incorrect detergent/chemcial concentrations. Verify that the detergent/chemical concentrations are correct for the associated water volume. TORQUE SETTINGS When replacing components either in the control box or the heater box area, the manufacturer has suggestions on how much to torque the screws and nuts used in securing items to the machine. Refer to the table below for the torque specifictions: ITEMS TORQUE SPEC Relays 16 In/lbs Heater Contactor 35 In/lbs Heater Nuts 16 In/lbs Terminal Block 50 In/lbs AJ-64 Conveyor Series Technical Manual 7610-003-30-93 Issued: 05-02-2006 Revised: N/A 51 SECTION 4: TROUBLESHOOTING D226 TROUBLESHOOTING SECTION WARNING: Inspection, testing and repair of electrical equipment should be performed only by qualified service personnel. Certain procedures in this section require electrical tests or measurements while power is applied to the machine. Exercise extreme caution at all times. If test points are not easily accessible, disconnect power, attach test equipment and reapply power to test. When replacing electrical parts, disconnect power at source circuit breaker. Problem: Power light does not illuminate. 1. Power not connected to the unit through the control box. Open the control box cover and verify that incoming power lines are connected and light. 2. Service breaker tripped or open. Verify that the breaker is closed. 3. Power switch connections could be lo...

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