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Tempstar/HH GPX Series Technical Manual 7610-002-57-32
Issued: 07-24-2006 Revised: N/A
SECTION 4: TROUBLESHOOTING
COMMON PROBLEMS
17
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: Dishmachine will not fill after the door is close. Power “ON” light is illuminated.
1. Faulty rinse solenoid valve. Repair or replace valve as required.
2. Faulty door switch. Verify the wiring of the switch; if correct, replace the switch.
3. Fouled/faulty high level probe. Clean probe if fouled. If clean, and still not working, replace.
Problem: Dishmachine will not fill after the door is closed. Power “ON” light is not illuminated.
1. Service breaker tripped. Reset. If the breaker trips again, contact an electrician to verify the amp draw of the machine.
2. Machine not connected to power source. Verify that the machine has been properly connected to the power source.
3. Faulty power source. Verify the wiring of the switch; if correct, replace switch.
Problem: Dishmachine will not run after the door is closed. Power “ON” light is illuminated and the unit is filling.
1. Timer motor is faulty. Verify that the timer is rotating. If not, check to see that the motor is receiving power. If so, replace
the motor and/or timer assembly.
2. Wash motor faulty/damaged. Verify that the wash motor is getting power. If so, replace the motor.
3. Wash motor contactor faulty. Check for continuity; if contacts are open, replace the contactor.
Problem: (TEMPSTAR GPX) Dishmachine runs continuously in the wash cycle.
1. Machine is in Delime mode. Flip NORMAL/DELIME switch to NORMAL mode.
2. Timer motor is faulty. Verify that the timer is rotating. If not, check to see that the motor is receiving power. If so, replace
the motor and/or timer assembly.
3. Cam timer jammed by obstruction. Remove obstruction.
Problem: (TEMPSTAR HH GPX) Dishmachine runs continuously in the wash cycle.
1. Machine is in delime mode. Change Operation Mode from DELIME to NORMAL position.
2. Wash cycle delay timer is faulty. During the wash cycle, the cam timer will move for the first 30 seconds of the wash cycle.
The cycle delay timer will then cause the cam timer to stop, in order to increase the length of the wash cycle. The red light on
the delay timer is in control of the cam timer. If the red light is not turning on (only during cycles B, C or D), replace the cycle
timer.
3. Wash cycle delay timer settings not correctly adjusted. If the wash cycle delay timer and rotating cam timer are working
correctly, the time cycles on the delay timer may be incorrectly adjusted. Adjust the delay potentiometer corresponding to the
B, C or D cycle. Rerun the appropriate cycle and see if the adjustment has made any change in the length of the cycle. If not,
replace the cycle delay timer.
4. Cam timer is faulty. Confirm that the wash cycle delay timer is functioning correctly (see above). Confirm that the timer
motor is receiving power. If it is, replace the motor and/or timer assembly. Make sure there are no obstructions which limit the
rotation of the cam timer.
Problem: Wash or rinse heater does not work.
1. Faulty heater element. Check element for continuity; if open, replace the heater.
2. Faulty heater contactor. Replace the contactor.
3. Misadjusted/faulty thermostat(s). Verify operation and setting of thermostats, replace if necessary.
Problem: Dishmachine fill slowly and/or the rinse is weak.
1. Clogged or obstructed rinse arms. Remove and clean the rinse arms.
2. Low incoming water pressure. Adjust the water pressure regulator to ensure that there is 20A5 PSI flow.
3. Y-strainer is clogged. Clean out the Y-strainer.