Engine Monitoring - Magnum MMG25FHZ Operating Manual

ENGINE MONITORING

Engine information is shown on the Liquid Crystal Display (LCD) window in a toggling manner with the Generator
information after the first 60 seconds of operation and then every five seconds thereafter. The engine display screen
will show oil pressure, engine coolant temperature, fuel level and battery voltage.
• Oil Press: Displays engine oil pressure. The display registers oil pressure between 0-100 psi. Normal
operating pressure is between 35-80 psi.
• Eng Temp: Displays the temperature of the engine's coolant. If the coolant temperature exceeds the
Maximum Water Temperature of 230° F the engine will automatically shut down. Zero "0" will be displayed
until a minimum temperature of 100° F is reached.
• Fuel Level: Displays the relative fuel level in the fuel tank in percent (50% = 1/2 tank, 75% = 3/4 tank, etc.).
If the fuel level drops below a programmed low fuel point – usually at 15%, a low fuel warning and optional
audio alarm will be activated. If the fuel level drops below the programmed low fuel limit, usually at 5%, the
engine will automatically shut down.
• Vbat: Displays the engine battery voltage. A normal reading is 13-14V on 12 volt systems and 24-26 on 24
volt systems, (with the engine running).
Additional information may be viewed while the unit is in "MANUAL" or "AUTO" mode. By pressing the "Page Select"
button, the operator will select one of the following screens; "Running" screen, "Password" screen, or "History" screen.
In each of these page selections the operator may press the " " or " " buttons on the "DIAGNOSTICS" keypad to
display additional information as follows:
• "Running" screen: The operator may press the " " or " " buttons on the "DIAGNOSTICS" keypad to
display the "Alarm List" screen, "ECU Alarm List" screen, "Run Hours" screen, "ECU Values" screen, Engine
display screen and Generator display screen.
• "Password" screen: The operator may press the " " or " " buttons on the "DIAGNOSTICS" keypad to
move the ">" cursor up or down a list of text.
• "History" screen: The operator may press the " " or " " buttons on the "DIAGNOSTICS" keypad to move
the ">" cursor up or down a list of the latest alarm or shutdown codes. Pressing the "Enter" button at a
particular selection will allow the operator to scroll to the right in the LCD window to view the generator
operating parameters at the time of the alarm or shutdown. The history of alarms or codes of the unit are
saved in the digital controller. The most recent alarm or code is the first to be listed, with the time/date of the
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