SECTION 4: TROUBLESHOOTING
COMMON PROBLEMS (EXPORT UNITS)
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 run, no voltage at wash relay terminals L1 and T1.
1.Service disconnect switch off or faulty. Turn disconnect on.
2.Branch circuit breaker tripped/fuse blown. Reset or replace.
3.Loose or broken connection to dishmachine. Tighten or replace connections.
Problem: Machine will not run in "ON" position unless cam timer is moved off the "home" position.
1.Door switch shorted out. With the door open, check for voltage between ORANGE/WHITE door switch and neutral. If 220V, replace the door switch.
2.Faulty control relay. With the door open, check for voltage between connections #9 & #3 on control relay. If 220V, replace control relay.
3.Faulty "cycle reset" microswitch in cam timer. Replace microswitch.
Problem: Machine will not cycle in "ON" position, works in Delime mode.
1.Faulty cycle reset cam microswitch. With the switch in the Normal position, rotate the cams manually off the home position. Check the voltage between the ORANGE and BLACK/WHITE wires on the cycle reset switch. If it is 220V, then the switch is open and should be replaced.
2.Faulty cam timer motor. If cam timer is not rotating, check the voltage to the motor. If voltage is present when the door is closed, replace the motor.
3.Faulty control relay. Check the voltage across contacts #9 and #6. If 220V when the door is closed, replace the relay.
4.Faulty NORMAL/DELIME switch. In the NORMAL position, check the voltage between WHITE/BLACK & WHITE/RED wires to switch. If 220V, replace the switch.
Problem: Machine will not run. Wash pump motor will run if wash relay is depressed manually (nothing else works).
1.Open door switch. With door closed, measure voltage between BLUE and WHITE/BLACK wires on terminals #6 & #9 of the relay. If 120V, replace the relay.
2.Faulty control relay. Measure between the BLACK wires on terminals #6 & #9 of the relay. If 220V, replace the relay. Measure between the WHITE/ BLACK wire on terminal 4 and the ORANGE/WHITE wire on terminal 7 of the relay. If 220V, replace relay.
Problem: Machine will not run in "ON" position or in Delime mode.
1.Faulty door switch. With door closed, check for voltage between WHITE/BLACK and ORANGE/WHITE wires to the door switch. If 220V, replace open switch.
2.Faulty OFF/ON/FILL switch. With switch ON, check voltage between BLACK and WHITE/BLACK wires on switch. Replace the switch if 220V.
3.Faulty NORMAL/DELIME switch. In the NORMAL position, check the voltage between WHITE/BLACK & WHITE/RED wires to switch. If 220V, replace the switch.
Problem: Machine cycles continuously.
1.Cycle reset switch loose. Reposition switch assembly, bend metal lever if necessary.
2.Faulty cycle reset switch.Measure between BLACK/YELLOW & ORANGE wires on "cycle reset" switch while timer is rotat- ing. As the switch lever drops into home position you should measure 220V. If not, adjust or replace the switch.
Problem: Machine fills continuously even with no power applied to machine.
1. Solenoid valve dirty or faulty. Clean valve, replace plunger and/or diaphragm.
Conserver XL Series Technical Manual
Issued:
32
