Section 3: Operation; Pre-Start Checklist; Manually Starting The Unit - Generac Power Systems MDG25IF4 Owner's Manual

Section 3: Operation

Pre-start Checklist

All items in the pre-start checklist must be completed
before starting the unit. This checklist applies to both
manual and remote starting of the unit.
WARNING
Consult Manual. Read and understand manual
completely before using product. Failure to
completely understand manual and product
could result in death or serious injury.
WARNING
Equipment damage. Do not attempt to start or operate
a unit in need of repair or scheduled maintenance.
Doing so could result in serious injury, death, or
equipment failure or damage.
WARNING
Risk of Fire. Unit must be positioned in a
manner that prevents combustible material
accumulation underneath. Failure to do so
could result in death or serious injury.

Verify all maintenance procedures are up to date. For
more information, see
Basic Maintenance
 Verify the unit is level.
 Verify there is no water inside, on, or near the unit;
dry if needed.

For grounding requirements, follow any local, state,
or National Electrical Code (NEC) guidelines.

Verify the control power switch is OFF (O).

Verify all circuit breakers are OFF (O).

Inspect all electrical cords; repair or replace any that
are cut, worn, or bare.

Verify oil, coolant, and fuel levels are correct, per the
engine manufacturer's manual.
 Verify battery connections are secure.

Turn the battery disconnect switch ON (if equipped).

Verify engine fan belt tension and condition are within
spec.
 Verify engine fan belt guard is installed and secure.

Check engine exhaust system for loose or rusted
components.
 Verify the radiator and surrounding shroud are clear
of debris.

Verify all covers are in place and secure.
Owner's Manual for Mobile Generator
(000100a)
(000291)
(000147)
General Maintenance
Schedule.
 Verify all electrical connections at the connection
lugs, if equipped, are tight and wired correctly.

Verify the voltage selector switch is set to the desired
voltage and locked.

Verify the emergency stop switch is pulled out.

Verify all doors on the unit are closed.

Manually Starting the Unit

Asphyxiation. Running engines produce carbon
monoxide, a colorless, odorless, poisonous
gas. Carbon monoxide, if not avoided, will
result in death or serious injury.
Fire risk. Fuel and vapors are extremely
flammable. Do not operate indoors. Doing
so could result in death, serious injury, or
property or equipment damage.
Operating the unit in MANUAL mode allows the operator
to start and stop the unit from the controller using the
engine START and STOP buttons.
and
To start unit in MANUAL mode:
1. Set controller power to ON (I). The controller
begins its boot sequence. When controller is ready,
the Home page displays.
NOTE: The controller boots in STOP mode, as indicated
at the top of the screen.
NOTE: If starting the unit in cold ambient temperatures, it
is recommended to start the unit at low idle, and allow the
engine to heat up the lubricating oil. For more
information, see
NOTE: The controller can be started from any screen
when it is in MANUAL mode.
2. Press engine START (I) button. The controller
begins the engine startup sequence and starts the
engine—provided no engine faults prevent starting.
NOTE: It takes several seconds for the engine to warm
(run smoothly and reach its operating speed). During
warming, the screen displays a different voltage than the
voltage selector switch.
3. If the engine does not start within three crank
attempts, the controller will display the failed start
alarm. The starting sequence can be repeated after
the starter has had a minimum of two minutes to
DANGER
WARNING
Low Idle Switch.
(000103)
(000281)
25