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AJ-64 Conveyor Series Technical Manual 7610-003-30-93
Issued: 05-02-2006 Revised: N/A
SECTION 4: TROUBLESHOOTING
D226 TROUBLESHOOTING SECTION
52
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: 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 loose. Ensure that the connections are of sound quality.
4. Power switch is faulty. Replace the power switch.
5. Power light is faulty. Replace the light.
Problem: Water pressure is too low.
1. Water pressure regulator is out of adjustment. Follow the instructions provided in the maintenance section and adjust so that
the flow pressure is 20 ±5 PSI.
2. Water pressure regulator internal strainer is clogged. Clean in accordance with the instructions provided in the maintenance
section.
3. Water pressure regulator is faulty. Replace the regulator.
4. Water pressure gauge is faulty or the cut off from the system. Verify that the test cock valve under the gauge is open to allow
for the sensing of line pressure. Replace gauge if necessary.
5. Heat exchanger is clogged. Replace the heat exchanger.
Problem: Solenoid valve is not opening/shutting.
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 loose. Ensure that the connections are of sound quality.
4. Power switch is faulty. Replace the power switch.
5. Thermostat is faulty. Replace the thermostat.
6. Solenoid wires are loose or broken. Verify that the electrical connections are of sound quality.
7. Faulty solenoid coil. Replace the solenoid.
Problem: Outlet water temperature too low.
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 loose. Ensure that the connections are of sound quality.
4. Power switch is faulty. Replace the power switch.
5. Thermostat is faulty. Replace the thermostat.
6. Solenoid wires are loose or broken. Verify that the electrical connections are of sound quality.
7. Faulty solenoid coil. Replace the solenoid.
8. Steam flow pressure is too low for the unit. Verify that the steam flow is 15-25 PSIG.
9. Water flow pressure is too high. Follow the instructions provided in the maintenance section and adjust so that the flow pres-
sure is 20 ±5 PSI.
10. Heat exchanger is clogged. Replace the heat exchanger.
11. Insufficient volume of steam to unit. Check the line size and flow pressure.