OPERATION AND MAINTENANCE
Operation
MeCAN begins transmitting J1939 CANbus data immediately after
Engine oil pressure and coolant temperature
Model 79.70.0014 transmits pressure and temperature data when the sender input is within normal resistance range. MeCAN also transmits appropriate SPN (Suspect Parameter Number) and FMI (Fault Mode Indicator) codes if:
•input resistance is out of normal sender range, e.g. open- or
•oil pressure drops below 20 psi (warning message) and 10 psi (shutdown/derate message)
•coolant temperature rises above 90°C/194°F (warning message) or 110°C/230°F (shutdown message)
Model 79.70.0020 transmits pressure and temperature data in accordance with the switch position:
Maintenance and Warranty
MeCAN contains no
•Check that MeCAN electrical connections are secure.
•Check that the case is mounted securely, with vibration and environmental exposure minimised where possible. The case may be wiped with a clean, damp cloth. Do not use cleaning solvents.
MeCAN is supplied with a two year warranty on parts and workmanship. In the event of a fault or technical query, and before returning equipment, please contact your Murphy representative for technical support.
| Input switch | Input switch |
| closed (to | open |
oil pressure data | 0 psi & | 100 psi |
| SPN/FMI code |
|
coolant temp data | 105°C / 221°F & | 90°C / 194°F |
| SPN/FMI code |
|
Oil pressure fault codes are not transmitted until 10 seconds after engine starting (once speed has risen above 800 RPM).
Engine speed data
RPM data is transmitted whenever a speed signal is present (above the minimum 10VAC peak). If engine speed exceeds 3500 RPM, MeCAN also transmits the appropriate overspeed fault SPN and FMI codes.
Battery voltage
MeCAN measures its DC power supply voltage and transmits this as J1939 ‘electrical potential’ data (PGN 65271).
Hours run
MeCAN transmits ‘engine hours run’ data (PGN 65253). The hours run value is stored in
In order to consistently bring you the highest quality, full featured products, we reserve the right to change our specifications and designs at any time.
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textual matter and illustrations, is copyright protected by Frank W Murphy Ltd., with all rights reserved. © 2008 Frank W Murphy Ltd.
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FW Murphy – MeCAN MEC300 installation instructions |
