Emergency Stop Switch; Engine Break-In Requirements; Manually Starting The Unit; Auto (Remote) Starting Of The Unit - Generac Power Systems MLT4200IF4 Owner's Manual

Operation
Table 3-1 illustrates the four possible combinations of
240V outlet breaker and Load Sense switch positions.
Table 3-1. Engine Speed Selection
ON
240VAC
Outlet
Breaker
OFF
*Engine will speed up automatically when more
power is drawn from receptacles.

Emergency Stop Switch

The unit is equipped with one emergency stop switch.
For location of the emergency stop switch, refer to
Component Locations. The red switch is clearly labeled
EMERGENCY STOP. The switch can be accessed and
activated with all doors closed and locked.
Activate the emergency stop switch by pushing the red
button in until it locks down. This will trip the main circuit
breaker which will open the contact, disconnecting the
load to the connection lugs. This will also open the fuel
circuit, shutting down the engine.
The switch will remain closed until it is pulled out.
Figure 3-4. Emergency Stop Switch
NOTE: Use the emergency stop switch only when the
unit must be shut down immediately. For any other shut
down, refer to Shutting Down the

Engine Break-In Requirements

NOTE: The EPA final tier 4 Isuzu engines have an
engine break-in duration that will prohibit the unit from
providing rated standby power upon factory delivery. The
unit is tested at the factory and is initially capable of a
prime standby power output. The engine performance
will increase to 95% of full rated power during the first 20
hours of loaded operation. The unit will provide full rated
24
Load Sense Switch
ON OFF
Load
dependent— High speed
variable speed*
Low speed Low speed
Unit.
power after the complete engine break-in period of 70
hours of loaded operation.
Operate the engine at heavy loads (60-90% [24-36kW] of
rated output maximum) as much as possible during the
break-in period.If the engine has spent significant time at
idle, constant speed(s) and/or light load or if makeup oil
is required, a longer break-in period may be needed.
Refer to the engines operator's manual for a full
description of necessary procedures on the addition of oil
and extension of the break-in period. For more
information on regular maintenance intervals, refer to
Basic Maintenance

Manually Starting the Unit

STOP mode is the default start-up setting for all units
equipped with the Power Zone–DLA. Use the following
procedure to start the generator in MANUAL mode.
1. Verify the 240VAC outlet breaker is switched OFF
(O).
2. Switch the main circuit breaker ON (I).
3. When the controller powers up, the Home screen
displays on the LCD screen and the Stop LED
illuminates to indicate that the controller is in STOP
mode. Press the Start button to initiate the startup
procedure. Assuming there are no existing engine
faults, the engine will start and the Start LED will
illuminate.
NOTE: The engine can be started from any screen. It
may take a few seconds for the engine to run smoothly
and reach its governed operating speed.
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 controller backlight
will go out. The engine will make two more
attempts to start for a total of three crank cycles.
5. If the engine does not start and run within three
starting cycles, the LCD screen will display the
002393
"Fail to Start" alarm. The starting sequence can be
repeated after the starter cools for at least two
minutes. Pressing the Stop (O) button will clear the
alarm and reset the controller.
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
Prestart Checklist
Also following any warnings and information on isolating
Guide.
and Manually Starting the
Owner's Manual for MLT4200IF4 Light Tower
Unit.