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Lofa EL240 Operation And Troubleshooting

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LOFA EL240 Operation and Troubleshooting
Introduction
This document provides general information on LOFA Industries EL240 control systems operation and
troubleshooting. EL240 control systems are a very flexible platform for diesel engine control, monitoring,
and protection, featuring LOFA's powerful First Fault Diagnostics (FFD). After pinpointing the initial failure,
FFD stores it in memory and alerts the end user via a single bright LED. FFD monitors battery charge, low oil
pressure, high temperature and up to two additional contact closure inputs. The microprocessor-based solid-
state design uses high-power semiconductors instead of outdated electromechanical relays to ensure reliable
high-current switching.
The EL240 can be factory configured with specific preheat and afterglow requirements. Alternately preheat
can be factory configured for indication from external preheat control. If preheat is not required, this output
can function as an alarm.
All standard panels include feature a 12 inch wiring harness terminating into a sealed weather proof plug.
This robust universal wiring connection performs well in harsh environments and allows interchanging a
number of different panels and harnesses. This design allows for simplified installation as well as a flexible
means to incorporate custom plug-and-play engine wiring harnesses and standard harness extension
Note
The engine harness is not included with the panel.
A number of standard engine harnesses are available or
LOFA can develop a custom harness for you exact needs.
Generic harnesses in various lengths are available for field customization.
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.
463-3000-05 Rev C.1 - 28-Feb-2007
1

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Summary of Contents for Lofa EL240

  • Page 1 This document provides general information on LOFA Industries EL240 control systems operation and troubleshooting. EL240 control systems are a very flexible platform for diesel engine control, monitoring, and protection, featuring LOFA’s powerful First Fault Diagnostics (FFD). After pinpointing the initial failure, FFD stores it in memory and alerts the end user via a single bright LED.

  • Page 2: Important Safety Information

    LOFA EL240 Operation and Troubleshooting 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.

  • Page 3: Operation

    LOFA EL240 Operation and Troubleshooting Operation Turning the control system key to the run position starts a self-test which causes all LEDs to illuminate once and enables the fuel run/stop solenoid output. After self-test, the LEDs indicate the state of the inputs they monitor.
  • Page 4 LOFA EL240 Operation and Troubleshooting To prevent unintentional engine shutdowns caused by intermittent conditions (i.e., pressure spikes, coolant movement) the control system requires a constant 1 second fault input to cause engine shutdown. Warning When used in combination with mechanical float type switches engine vibrations may prevent constant contact closure.
  • Page 5 LOFA EL240 Operation and Troubleshooting Warning Low oil pressure is not an indication of low oil level. For best possible protection LOFA recommends using our solid-state oil level shutdown switch. Note Most shutdown switches are grounded through the switch body.

  • Page 6: Oil Pressure Gauge

    LOFA EL240 Operation and Troubleshooting Warning When used in combination with mechanical float type switches engine vibrations may prevent constant contact closure. The control system is factory configured to shutdown with no delay for the auxilary shutdown inputs. Preheat LED (Red) A solidly illuminated Preheat LED is the system preheat indication.

  • Page 7: Temperature Gauge

    LOFA EL240 Operation and Troubleshooting Temperature Gauge The gauge measures engine temperature with a resistance sender on the engine referenced to ground. When a sender/switch combination is used on the engine, the marking G generally indicates the gauge terminal. The gauge expects a high resistnace for low temperatures and a lower resitance for higher temperatures.

  • Page 8: Harness Routing

    These chemicals may cause seal damage and allow water entry. Use LOFA provided cavity plugs to seal the connector if wires are 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 connectors.

  • Page 9: Voltage Drop

    A reliable ground must be provided for the control system. LOFA recommends the ground connection be made directly to the battery negative. Grounding through frame members is not recommended. All ground paths must be capable of carrying any likely fault currents.
  • Page 10 Voltage drops can be caused by transients from external equipment, improper wire sizes, faulty wiring or nearby lightning strikes. In the absence of a LOFA Power Box, relays may be needed for long wire runs. Suppression of Voltage Transients (Spikes) Warning The installation of voltage transient suppression at the transient source is required.
  • Page 11 LOFA EL240 Operation and Troubleshooting Welding on Equipment with Electronic Controls Proper welding procedures are required to avoid damage to electronic controls, sensors, and associated components. The component should be removed for welding if possible. The following procedure must be followed if the component must be welded while installed on equipment with electronic controls.

  • Page 12: General Troubleshooting

    LOFA EL240 Operation and Troubleshooting General Troubleshooting For additional information, refer to engine manufacturer troubleshooting guide. No response from starter motor Possible Cause Possible Remedy No battery voltage to starter Verify wiring and battery connection (power and ground) Battery discharged...
  • Page 13 LOFA EL240 Operation and Troubleshooting Fuel Run/Stop Solenoid Troubleshooting Engine does not stop immediately Possible Cause Possible Remedy Back feed from motor (i.e., Add relay or blocking diode cooling fan) Sticking solenoid linkage Repair or replace solenoid linkage Fuel valve without check valve...

  • Page 14: Control System Troubleshooting

    Initial Release. Rev A – 22-May-2006. Corrected typographical errors. Rev B – 26-Oct-2006. Add symbols to Indicators, corrected typographical errors. Initial EL240 release. Rev C – 8-Jan-2007. Updated schematics, removed Power Box information. Rev C.1 – 28-Feb-2007. Added part numbers.

  • Page 18: Software License Agreement

    Acceptance of Terms of this Agreement In order to use the LOFA software referenced herein, you must first agree to the provisions of this Agreement. Use of LOFA software is prohibited without acceptance of all the terms in the Agreement.
  • Page 19 (including attorney fees), brought against LOFA which is based on the creation, use or distribution of Licensee Devices to the extent that such suit or proceeding does not arise or result from: (i) LOFA's material breach of any agreement, obligation, representation, warranty or covenant contained in this Agreement;...
  • Page 20 Special License Terms THE LICENSE GRANTED HEREUNDER IS RESTRICTED SOLELY TO THE OPERATION OF THE LOFA HARDWARE AND FOR NO OTHER PURPOSE. NO SUCH LICENSEE DEVICE INCORPORATING ANY OF THE MATERIALS MAY BE DISTRIBUTED, LICENSED, SOLD, RENTED, OR OTHERWISE PROVIDED TO THIRD PARTIES WITHOUT LOFA’S EXPRESS WRITTEN PERMISSION.

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