Auto (Remote) Starting Of The Unit - Generac Power Systems MAGNUM MTT20IF4 Operating Manual

Combination light tower generator & water trailer
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4. If the engine does not start after the first cranking attempt, the engine will pause for 15 seconds to allow the
starter to cool. The engine will make two more attempts to start for a total of three crank cycles.
Note: The controller backlight will go out when the engine is cranking.
5. Should the engine not start and run within three starting cycles, the LCD window will show the Fail to Start alarm
icon (
). The starting sequence may be repeated after the starter has had a minimum of two minutes to cool.
Pressing the Stop button will clear the alarm and reset the controller.
6. Once the engine starts, it will immediately begin speeding up to a constant 1800 rpm. The engine may hunt or
change speeds until operating speed is reached. After a few minutes of operation, the engine will be warmed
up and the operator screens will show engine and generator operating parameters. The animated engine running
icon (
) will be displayed.
7. Check the generator for excessive noise or vibration and any coolant, oil, or fuel leaks before applying any loads.
8. Check that the frequency (Hz) is correct on the Generator screen. With no loads connected to the generator,
the frequency should read approximately 60 Hz, depending on the type of engine governing used.
9. Once the engine is running, allow it to reach normal operating temperature before switching on any loads.
10. If all wiring connections have been made correctly, switch the main circuit breaker to the ON (I) position and then
add any loads attached to the receptacles by switching the respective circuit breaker to the ON (I) position. You
will notice a slight change in engine sound when a load is applied to the unit.

AUTO (REMOTE) STARTING OF THE UNIT

Auto mode is used when the unit is started from a location other than the control panel by using a transfer switch.
Auto (remote start) is the normal setting when the generator is being used as a standby power supply. Before putting
the unit in the Auto mode, review the
Also following any warnings and information on isolating the generator with a transfer switch if the unit is to be used
as a standby power supply. Then continue with the steps described below:
1. Perform a manual start of the unit at least once to verify that the engine is operating correctly.
Note: The lights are automatically disconnected on startup. The main circuit breaker can be left on if no other loads
are connected, except for the lights. Any connected external loads must be disconnected by a transfer switch when
starting the unit.
2. If a check of the remove start circuit is desired:
a. Remove the wires from the remote start terminal block. Press the Auto button. The Auto LED with be lit.
b. Attach a jumper wire (minimum 16 gauge) across the two terminals on the remote start terminal block.
This applies a ground to the L401 controller to close the starting circuit contacts. The engine should
crank, start and run.
c. Remove the jumper wire form the remote start terminal block and the engine will stop.
d. Reconnect any necessary wires form the remote start switch (transfer switch) to the remote start terminal
block.
3. Confirm the unit is in Auto mode. The Auto LED should be lit.
4. Secure the unit by closing and locking all access doors.
5. The unit is now ready for remote starting.
"Prestart Checklist" on page 25
and
"Manual Starting of the Unit" on page
26.
27

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