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AJ-64 Conveyor Series Technical Manual 7610-003-30-93
Issued: 05-02-2006 Revised: N/A
SECTION 4: TROUBLESHOOTING
COMMON PROBLEMS
50
WARNING: Inspection, testing and repair of electrical equipment should be performed only by qualified service per-
sonnel. 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: Nothing on dishmachine operates. The power switch is ON and the power indicator light is OFF.
1. Machine is not wired correctly to incoming power source. Have an electrician verify wiring.
2. Machine circuit breaker is tripped. Reset the circuit breaker. If it trips again, contact an electrician to verify the machine amp
draw.
3. Service breaker is tripped. Reset the service breaker. If it trips again, contact an electrician to verify the machine amp draw.
Problem: Machine will not fill. The power switch is ON and the power indicator light is ON.
1. No water supply to machine. Verify that water lines have been connected to the machine.
2. Dishmachine doors are not closed. Close doors completely.
3. Incoming water solenoid valve damaged/faulty. Verify that the valve is operating. If not, replace.
4. Tank floats faulty. Verify the wiring of the floats. Verify that no debris is jamming the floats. 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.