Jackson ECOLAB ES-2000 Installation & Operation Manual Download

Page: 33 / 91

Problem: Dishmachine will not fill, though other functions work.

1. Y-strainer on incoming water line plugged or clogged. Remove strainer and clean out.
2. Water supply valve(s) turned off. Turn the valve(s) on.
3. Faulty solenoid valve diaphragm. Replace diaphragm, clean foreign material out of valve body and orifices.
4. Faulty solenoid coil. If the coil has voltage, but no continuity, replace the coil (continuity is measured across coil connectors
with wires removed).
5. Faulty fill microswitch. During fill, measure the voltage between the ORANGE and WHITE/GREEN wires. If it reads 120 volts,
adjust or replace the switch.

Problem: Dishmachine fills continuously, even without power applied to the machine.

1. Solenoid valve dirty or faulty. Clean valve or replace faulty parts as required.

Problem: Dishmachine fills continuously, only when power is supplied to the machine.

1. Faulty fill microswitch. Repair or replace switch as necessary.
2. Cam timer stalled in fill position. If the cam timer is not rotating, check the voltage to the timer motor. If it measures as 120
volts when the door is closed, replace the timer motor.
3. Shorted ON/FILL-OFF/DRAIN switch. Check the voltage between the BLACK and WHITE/GREEN connections on the
ON/FILL - OFF/DRAIN switch in the “ON” position. If it does not read 120 volts, replace the switch.

Problem: The wash motor does not run, other functions work. Wash motor only runs when the wash relay is manual-
ly pushed down.

1. Loose wire connection to microswitch, relay, or contactor. Tighten wires as required.
2. Faulty wash cam microswitch. During a wash cycle, check the voltage between the ORANGE and BLACK/ORANGE wires
on the wash microswitch. If it reads 120 volts, the switch is open and should be replaced.
3. Faulty NORMAL/DELIME switch. During the wash cycle, check the voltage between the two BLACK/ORANGE wires (not the
jumper). If it reads 120 volts, replace the NORMAL/DELIME switch.
4. Faulty control relay. Check the voltage across relay contacts #7 and #4. If it measures 120 volts during the wash cycle,
replace the relay.
5. Faulty wash relay. Check the voltage at the relay coil between the ORANGE/BLACK and WHITE wires. If you read 120 volts,
then the coil is faulty. Replace the wash relay.

Problem: The wash motor does not run even when the wash relay is manually depressed; other functions work.

1. Loose wire connections to motor, delime switch, or from contactors. Tighten wires as necessary.
2. Mechanical binding in pump. If the motor has the correct incoming voltage, and its overload is tripping, repair or replace the
pump.
3. Faulty wash motor. If the motor has the correct incoming voltage, and the pump is alright, replace the motor.
4. Faulty wash relay. With the wash relay pushed in, check the voltage between T1 and L1 of relay. If it measures 120 volts,
replace the relay.
5. High or low voltage problem. Check voltage at the wash motor and at the incoming power terminal block. Compare to elec-
trical specifications.

Problem: Wash motor runs continuously.

1. NORMAL/DELIME switch is in “DELIME” position. Place the switch in the “NORMAL” position.
2. Wash relay welded closed. Turn the machine off. If the wash relay doesn’t release, replace contactor.
3. Cam timer stalled in the wash or rinse cycle. If the cam timer is not rotating, check the voltage to the timer motor. If there is
no voltage when the door is closed, check the wires and/or replace the timer motor.
4. Wash motor microswitch is faulty. Tighten the connections, ensuring that the switch makes contact, replace if necessary.

ES-2000 & ES-4000 Series Installation/Operation Manual 7610-011-35-10

Issued: 10-29-2007 Revised: N/A

SECTION 4: TROUBLESHOOTING

COMMON PROBLEMS