Jackson JP-24F, jp-24b, JP-24BF technical manual Troubleshooting Section, Common Problems

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SECTION 4: TROUBLESHOOTING SECTION

SECTION 4: TROUBLESHOOTING SECTION

COMMON PROBLEMS

WARNING: Inspection, testing and repair of electrical equipment should be performed only by qualified service personnel. 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: Water overflow from bottom of door.

1.Clogged drain. Remove obstruction.

2.Machine not level. Level machine, or increase height to the front.

3.Excessive inlet pressure. Install pressure reducing valve, or adjust if one is present. Ensure flow is 20A5 PSI.

4.Detergent foaming. Reduce detergent quantity.

Problem: Wash motor doesn’t operate on manual wash.

1.Loose or broken wires. Reconnect or replace wires in motor.

2.Defective manual wash switch. Replace.

3.Defective motor starting relay. Replace.

Problem: Motor operates on manual wash but not on automatic.

1.Defective timer. Replace timer.

2.Defective circuit in manual wash switch. Replace switch.

Problem: No water comes through the rinse arms when the “ON/FILL” switch is depressed.

1.Water not turned on. Turn water on.

2.Defective solenoid valve. Replace solenoid valve.

3.Probes are dirty or coated. Clean probes.

4.Defective water level control. Replace.

Problem: Little or no water coming through the rinse assemblies.

1.Limed up rinse heads or piping. Delime rinse heads.

2.Low water pressure. Increase pipe size to machine. Adjust pressure regulator.

Problem: Rinse water runs continuously with breaker turned off.

1.Defective plunger in solenoid valve. Replace.

2.Defective diaphragm in solenoid valve. Replace diaphragm.

Problem: Rinse doesn’t operate on automatic during timed cycle (but does operate in auto/fill operation).

1. Timer defective. Replace timer.

Problem: Rinse water runs continuously with power applied to machine, but when circuit breaker to machine is turned off, water stops.

1.Defective water level control. Replace.

2.Probes are dirty or coated. Clean probes.

Problem: Wash temperature not at required reading on thermometer.

1.Defective thermometer. Replace.

2.Defective thermostat. Adjust thermostat. Replace thermostat.

3.Rinse heater defective. Replace heater element.

4.Water level protection control device. Replace.

JP-24 Technical Manual 7610-002-49-79 Rev. D

Issued: 03-06-2006 Revised: N/A

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Contents March 6 P/N 7610-002-49-79 Revision D TECHNICAL MANUALFOR JACKSON MODELS JP-24 JP-24F JP-24B JP-24BF HOT WATER SANITIZING UNDERCOUNTER DISHMACHINESPage DETAILS REVISIONMADE APPLICABLENOMENCLATURE FOR THE MODELS COVERED IN THIS MANUAL Model Serial No Installation Date Service Rep. Name Phone NoJP-24B PREVENTATIVE MAINTENANCE TABLE OF CONTENTSI. SPECIFICATION INFORMATION II. INSTALLATION/OPERATION INSTRUCTIONSSECTION SPECIFICATION INFORMATION PERFORMANCE/CAPABILITIES OPERATING CAPACITY RACKS/HOUR SECTION 1 SPECIFICATION INFORMATIONSPECIFICATIONS of the JP-24/JP-24F 5 MINUTE TIMER OPERATING CYCLE SECONDS5 MINUTE TIMER OPERATING CYCLE SECONDS WASH TIME SPECIFICATIONS of the JP-24B/JP-24BF22 5/8” JP-24 DIMENSIONSDIMENSIONS 30.5 cmSECTION INSTALLATION/OPERATION INSTRUCTIONS INSTALLATION INSTRUCTIONS SECTION 2 INSTALLATION/OPERATION INSTRUCTIONSELECTRICAL INSTALLATION INSTRUCTIONS OPERATION INSTRUCTIONS DETERGENT CONTROL CYCLE COUNTER RETROFIT KIT INSTRUCTIONS SECTION PREVENTATIVE MAINTENANCE SECTION 3 PREVENTATIVE MAINTENANCE SECTION TROUBLESHOOTING Problem Wash motor doesn’t operate on manual wash SECTION 4 TROUBLESHOOTING SECTIONCOMMON PROBLEMS Problem Water overflow from bottom of doorProblem No indication of pressure Problem Machine doesn’t drain when “OFF/DRAIN” switch is pressedProblem Rinse water not at required temperature range SECTION SERVICE PROCEDURES TOOLS REQUIRED SECTION 5 SERVICE PROCEDURESRINSE SOLENOID VALVE REPAIR PARTS KIT PREPARATIONRINSE SOLENOID VALVE REPAIR PARTS KIT CONTINUED 13. Slowly remove the valve bonnet. Note The spring for the plunger is located directly under the bonnet and may come free if you are not careful. Remove the plunger, spring and valve bonnet and place to the side SPECIAL PARTS AFTER MAINTENANCE ACTIONSSolenoid Valve Plunger Kit Includes plunger and spring Part number VACUUM BREAKER REPAIR PARTS KIT VACUUM BREAKER REPAIR PARTS KIT CONTINUED Heater REPLACING THE PUMP MOTOR/REPLACING THE HEATERREPLACING THE PUMP MOTOR REPLACING THE BOOSTER TANK HEATERMINAL ON THE MOTOR REPLACING THE DRAIN VALVE REPLACING THE DRAIN VALVEReplacing the Drain Valve RINSE REGULATING THERMOSTAT REPLACEMENT Remove the thermostat bracket mounting nuts with the 3/8” nutdriver 9. Note regardless of the unit this is being done to, the con- cept is to ensure that the thermostat cannot come into contact with the heater leads or interfere with the placement of any covers SPECIAL NOTES SECTION PARTS SECTION Mfg. No GAUGE PANEL ASSEMBLYSECTION 6 PARTS SECTION ITEM QTY DESCRIPTIONDESCRIPTION ELECTRICAL PANEL ASSEMBLY JP-24/F 208-240 VOLTELECTRICAL PANEL ASSEMBLY JP-24B/BF 208-240 VOLT ELECTRICAL PANEL ASSEMBLY JP-24B/BF 460 VOLT AMTRAK External Control Box Option This panel is used with the following External Control Box OptionMfg. No RIGHT SIDE VIEW AMTRAK OPTION ELECTRICAL PANEL ASSEMBLY EXTERNAL OPTION & AMTRAK OPTIONFRONT VIEW EXTERNAL OPTION INSIDE VIEW of AMTRAK & EXTERNAL OPTIONSELECTRICAL PANEL ASSEMBLY EXTERNAL OPTION & AMTRAK OPTION CONTINUED Control Panel Only 460 Control Panel Assembly 05700-002-18-38 KICK PLATE ASSEMBLYDecal, Power Disconnect Warning 09905-021-47-07 Nut, Nylon Wing, 1/4”-20 Control Panel Assembly 05700-011-40-93INCOMING PLUMBING ASSEMBLY JP-24/JP-24F Vacuum Breaker AssemblyINCOMING PLUMBING ASSEMBLIES JP-24B/JP-24BF Connects to Rinse Injector Connects to Rinse Stiffener RINSE STIFFENER/RINSE HUB WELDMENTComplete Vacuum Breaker Assembly, 1/2” NPT Complete 110 Volt Solenoid Valve Assembly, 1/2”Coil & Housing only, 1/2” Complete 220 Volt Solenoid Valve Assembly, 1/2”SECTION 6 PARTS SECTION DRAIN VALVE ASSEMBLYDRAIN PLUMBING ASSEMBLY WASH MOTOR TO WASH TUB ASSEMBLY 40F Rise PhaseRINSE TANK & COMPONENTS/STRIP HEATER KIT JP-24B/BFRINSE TANKOrder this entire assembly using DOOR ASSEMBLYMISCELLANEOUS DOOR SUB-ASSEMBLIES Door Latch AssemblyRinse Arm Assembly Wash Arm AssemblyRINSE ARM & WASH ARM ASSEMBLIES FRAME & PANEL COMPONENTS/MISCELLANEOUS PARTS CYCLE COUNTER RETROFIT KIT SECTION ELECTRICAL SCHEMATICS JP-24/JP-24F 208-230 VOLT - 50/60 HERTZ - SINGLE PHASE SECTION 7 ELECTRICAL SCHEMATICSJP-24B/JP-24BF 208-230 VOLT - 50/60 HERTZ - SINGLE PHASE JP-24B/JP-24BF 460 VOLT - 60 HERTZ - THREE PHASE