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LOFA EP250 Operation and Troubleshooting

2

463-3000-01 Rev C.1 - 28-Feb-2007

Warning

When replacement parts are required, LOFA Industries recommends using replacement parts

supplied by LOFA or parts with equivalent specifications.

Failure to heed this warning can lead to premature failure,

product damage, personal injury or death.

Important Safety Information

The warnings in this publication are not all inclusive.

LOFA Industries cannot anticipate every potential hazard.

Appropriate safety rules and precautions should be followed with any

tool, work method or operating procedure.

Improper procedures, tools and materials may cause

damage or make the equipment unsafe to operate.

Only persons with appropriate training, skills and tools

should perform these functions.

Improper operation, maintenance or repair of this product can be

dangerous and may result in injury or death.

Do not operate or perform any maintenance or repair on this product until all operation,

maintenance and repair information is read and understood.

The information, specifications, and illustrations in this publication are based on information

available at the time of publication.

All items are subject to change at any time without notice.

Summary of Contents for EP250

Page 1: ...ions The Diagnostic Program Gauge DPG features a backlit LCD display with three push buttons all in a compact 2 inch gauge The LCD is clearly readable in both bright sunlight as well as total darkness...

Page 2: ...tions should be followed with any tool work method or operating procedure Improper procedures tools and materials may cause damage or make the equipment unsafe to operate Only persons with appropriate...

Page 3: ...ngine is not started within 10 seconds of turning on the system the fuel run stop solenoid output is turned off to prevent battery discharge when the key switch is left in the run position The fuel ru...

Page 4: ...e cold starting aids may require multiple relays Optional or additional components may allow preheat time to be modified by sensing ambient temperature Depending on specific configuration this output...

Page 5: ...m typically senses high temperature from a ground contact switch on the engine When a sender switch combination is used on the engine the marking WK or W generally indicates the switch terminal This i...

Page 6: ...n this indicates a problem with the solenoid circuit A battery voltage reading of approximately 14 volts on a 12 volt system 28 volts on a 24 volt system while the engine is running indicates the batt...

Page 7: ...auge to read full scale pegged When using sender switch combinations swapping the WK and G terminal prevents the gauge from working and may cause unintended shutdowns Warning If the temperature sensor...

Page 8: ...re removed Unsealed Connectors For unsealed connectors exposed to the elements LOFA recommends using dielectric grease to protect contacts Warning LOFA does not recommend using sealant with unsealed c...

Page 9: ...exposed to high temperatures Warning Disconnecting the battery while the engine is running may damage electrical components When using a battery disconnect switch LOFA recommends using a 2 pole switc...

Page 10: ...nded electrical environment practices Inductive devices such as relays solenoids and motors generate voltage transients and noise in electrical circuits Unsuppressed voltage transients can exceed SAE...

Page 11: ...round the welder to electrical components such as the control ground or sensors Improper grounding can cause damage to electrical components Clamp the ground cable from the welder to the component bei...

Page 12: ...se Possible Remedy Shutdown switch input active Verify shutdown source exists correct condition or correct faulty circuit Battery not charging Verify alternator charging see Alternator not charging ba...

Page 13: ...ble Cause Possible Remedy Empty fuel tank Fuel engine Clogged filter Replace filter Air in fuel lines Bleed fuel lines Low fuel pressure Replace faulty fuel pump and or clogged filter Faulty fuel pump...

Page 14: ...i e v belt coolant level or faulty switch correct wiring fault All normally closed shutdowns illuminate for one second control system reset Add suppressor diodes protect from nearby lightening strike...

Page 15: ...and Troubleshooting 463 3000 01 Rev C 1 28 Feb 2007 15 Typical Schematics The following pages show typical schematics Details vary from installation to installation See the specific schematics for ins...

Page 16: ...6 AWG Black MSS200 INTERFACE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 1 2 3 4 5 6 2 3 X10 1 X6 X7 X8 30 31 31 30 50f 58 K1 30 K1 87a 31 K1 87 k1 87 K1 85 K4 87 K4 87a D W G 19 17 Sol2 Sol X9 X4 X3 X5 D Altern...

Page 17: ...d Wiring Diagram Kubota Alternator Wiring Diagram Delco Alternator Wiring Diagram 14 AWG Purple To P1 H Note WK Switch G Gauge SW1 Aux 1 Shutdown J2 8 Pos White 1 2 3 4 5 6 7 8 J1 8 Pos Yellow 1 2 3 4...

Page 18: ...9 10 11 12 13 14 50 50 Sol Temp PSI W Solenoid Aux Switch 1 Temp Switch Aux Switch 2 Pressure Switch Ground Ground Starter 50 Accessory 15 Tachometer Preheat Control Pressure Gauge Temp Gauge D Alter...

Page 19: ...ram Note WK Switch G Gauge SW1 Aux 1 Shutdown SW2 Aux 2 Shutdown Indicator Only THE INFORMATION CONTAINED IN THIS DRAWING IS CONFIDENTIAL AND THE SOLE PROPERTY OF LOFA INDUSTRIES INC Reproduction or d...

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