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DC CONTROL/LATCH-CRANK
CIRCUIT BOARD
The circuit board, housed inside the generator control
console, controls engine starting, running and shut-
down. The board provides either manual (electric) or
automatic starting. It senses the generator is running by
means of generator AC output.
ENGINE STARTUP
When the engine starts, the starter is disabled when AC
output reaches about 40 volts AC (rms). Engine speed
at that point has reached between 1000 to 1250 rpm.
A nominal 5-second time delay after starter cutout is
provided. That is, if any one or more of the shutdown
faults (low oil pressure, high coolant temperature, low
coolant level, etc.) occurs 5 seconds or more after the
starter cutout has occurred, the engine shuts down and
the fault indicator lamp goes ON after the fault has been
maintained for 2 seconds.
AFTER FAULT SHUTDOWN
The engine cannot start until engine control is reset, fol-
lowing an automatic fault shutdown with the fault lamp
ON. Reset the control by setting the Start/Run/Off switch
to "Off" and then back to "Run."
OVERSPEED
A speed circuit controls engine cranking, start-up, oper-
ation and shutdown. Engine speed signals are delivered
to the circuit board whenever the unit is running.
Should the engine overspeed above a safe, preset value,
the circuit board initiates an automatic engine shut-
down. (About 74 Hz. or 2220 RPM)
OVERCRANK SHUTDOWN
If the engine fails to start after a crank cycle of 90 sec-
onds (8 seconds on, 8 seconds off), this function will
illuminate the fault indicator and stop the crank cycle.
OPERATING INSTRUCTIONS
BEFORE STARTING
• Prior to starting the engine, make sure the engine-
generator has been properly prepared for operation
as outlined in PREPARATION BEFORE USE (Pages
7-10).
• Check that both of the power panel (compression
lug) doors are closed and latched. The engine will
not start if any power panel door is open (Figure 9
on page 9).
• Check that the Voltage Adjust Dial is adjusted for
the proper voltage that your loads require.
GR-210 Generator Set
STARTING THE ENGINE
• Be sure all necessary cables are connected to the
full capacity compression lugs before starting the
engine (see pages 8-9). ALL electrical loads must be
switched off before starting the engine (including
loads connected to the receptacle panel).
• Place the Auto/Off/Manual switch in "Manual" posi-
tion.
• Crank the unit by moving the Start/Run/Off switch
to "Start".
• When engine starts and runs at rated Hz, release the
start switch to the "Run" position.
• Let the engine stabilize and warm up for a few min-
utes. Then turn on the desired electrical loads.
During starting, the fault indicator lamp remains
ON until oil pressure builds. If any monitored
shutdown occurs, you cannot restart the engine
until you reset the controls. To do this, set the
Start/Run/Off switch to "Off" and then back to
"Run."
SHUT DOWN
• Turn all loads OFF .
• Let the engine run at no-load for a few minutes to
stabilize internal engine temperatures.
• On
the
generator
Start/Run/Off switch to "Off". Wait for the engine to
come to complete stop.
OPERATION IN ICE OR SNOW
If the generator has been exposed to freezing rain or
snow, be sure to inspect the air inlet and outlet areas in
the compartment. Do not operate the unit if snow or ice
have blocked or obstructed the air openings.
The generator is equipped with a "pusher" type cooling
fan. This type of cooling fan draws air into the genera-
tor, then expels the air outward through the engine radi-
ator. If cooling air flow is obstructed, the engine-genera-
tor may overheat.
GROUNDING THE GENERATOR
The National Electric Code (NEC) requires that the
frame and external electrically conductive parts of the
generator be properly connected to an approved earth
ground. Local electrical codes may also require ground-
ing of the unit. Consult with a local electrician for
grounding requirements in your area.
Grounding helps prevent dangerous electrical shock if a
ground fault exists in the generator or connected elec-
trical devices. Grounding also helps dissipate static
electricity that often builds up in ungrounded devices.
Static electricity alone can cause very painful shock and
may cause one to believe that a shorted condition exists
in equipment.
Generac
Operation
NOTE:
control
console,
Power Systems, Inc. 13
®
set
the
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