Resetting The "Time To Service" Reminder; Troubleshooting Automatic Shutdown Conditions - Generac Power Systems MOBILEPOWER MMG130D Operating Manual

RESETTING THE "TIME TO SERVICE" REMINDER

The Magnum Digital Controller (MDC) will display the message "WrnMaintenance" when the unit is due for
maintenance or service. The maintenance or service interval is set at 250 hours of engine running time. Once the
unit has been serviced, the "Time to Service" reminder needs to be reset to the 250 hour interval. The following
procedure demonstrates how to reset the running hours to 250:
1. With the unit shut down, power up the controller with the "Control On/Off" toggle switch. The initialization
screen will be displayed. The controller will toggle automatically to the "Ready" screen.
2. Press the "PAGE SELECT" button. The next screen will display lines of text; starting with the word
"Password", then "Basic Settings", "Engine Params", "Engine Protect", etc. The top line has a ">" cursor
before the word "Password".
3. Press the "" button to move the ">" cursor down to the "Engine Protect" line of text.
4. Press "ENTER". "WrnMaintenance" will appear at the top left of the display screen. The current service
time hour setting remaining (0) will be one line below it on the right side.
5. Press "ENTER". The current run time in hours will now appear on the left side of the display screen,
directly under "WrnMaintenance."
6. Press the "" button and reset the current run time hour setting to 250. If you pass the 250 time interval
use the "" button to get back to the 250 time interval.
7. Press "ENTER" to save the current run time hour setting.
8. Move the "CONTROL ON/I" toggle switch to the "CONTROL OFF/O" position.

TROUBLESHOOTING AUTOMATIC SHUTDOWN CONDITIONS

Allow engine to cool before performing any troubleshooting procedures. Contacting
LOW FUEL LEVEL SHUTDOWN
1. Check the fuel level on the Liquid Crystal Display (LCD) window. Confirm that the generator is sitting
level to ensure an accurate reading.
2. Check for leaks in the fuel tank. The fuel tank should not run dry under normal circumstances. The engine
controller will shut the engine down when there is 5% of fuel remaining in the tank. This is done to keep
the fuel lines from running dry.
3. If the fuel level is good and no leaks are found, check the fuel level sender and the connecting wiring
for damage. To check for continuity between the sender and the engine controller, remove the appropriate
bolts from the control panel to access the inside of the control box. Consult the DC wiring diagram for
the proper path between the engine controller and the fuel level sender.
LOW OIL PRESSURE SHUTDOWN
1. Check the level of the engine oil with the dipstick. The engine controller will shut the engine down when
the oil pressure is less than 20 psi (138kPa). Add oil if required.
2. Visually inspect the engine for oil leaks.
3. If the oil level is good, restart the unit and verify the loss of oil pressure. Shut the engine down immediately
if the oil pressure value does not read 5 psi (34kPa) within 5 seconds.
4. Check the oil pressure sender. To identify corrective action, refer to the troubleshooting section of the
engine operator's manual provided with the unit.
LOW COOLANT LEVEL SHUTDOWN
1. Allow the engine to cool. Confirm the unit is sitting level to ensure an accurate reading.
2. Check the coolant level in the radiator. To access the radiator cap, you must remove the access panel
from the top of the enclosure directly above the radiator. Add coolant until it is 3/4 in. (1.9 cm) below the
filler neck. Secure the radiator cap back into its original position.
3. Inspect coolant hoses, engine block and water pump for visible leaks.
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the engine when it is hot will cause severe personal injury.
WARNING