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12 Bryant
NOTE:
The exerciser will only work in the AUTO mode and
will not work unless this procedure is performed. The
exerciser will need to be reset every time the 12-volt
battery is disconnected and then reconnected.
The exerciser WILL NOT work if dip switch 2 on
the controller printed circuit board (Remote Not
Auto) is ON.
NOTE:
Damage will result if battery connections are made in
reverse.
2.7 PROTECTION SYSTEMS
2.7.1 LOW OIL PRESSURE SWITCH
This switch (Figure 2.3) has normally closed contacts
that are held open by engine oil pressure during cranking
and operating. Should oil pressure drop below the 8 psi
limit, switch contacts close, and the engine shuts down.
The Low Oil LED will light. The unit should not be
restarted until oil is added. The AUTO/OFF/MANUAL
switch must then be turned to OFF and then back to
AUTO to reset.
2.7.2 HIGH TEMPERATURE SWITCH
This switch’s contacts (Figure 3.3) close if the
temperature should exceed approximately 140º C (284º
F), initiating an engine shutdown. The High Temp. LED
will light. The generator will automatically restart and the
LED on the generator control panel will reset once the
temperature has returned to a safe operating level.
Figure 2.3 – Low Oil Pressure and
High Temperature Switches
2.7.3 OVER CRANK
This feature prevents the generator from damaging itself
when it continually attempts to start and another problem,
such as no fuel supply, prevents it from starting. The unit
will crank and rest for a preset time limit. Then, it will stop
cranking, and the Over Crank LED on the generator
control panel will light indicating an over crank failure.
The AUTO/OFF/MANUAL switch will need to be set to
OFF and then back to AUTO to reset the generator
control board.
NOTE:
If the fault is not repaired, the over crank feature will
continue to activate.
2.7.3.1 Approximate Crank Cycle Times
• 15 seconds ON
• 7 seconds OFF
• 7 seconds ON
• 7 seconds OFF
• Repeat for 45 seconds
Approximately 90 seconds total
2.7.4 OVER SPEED
This feature protects the generator from damage by
shutting it down if it happens to run faster than the preset
limit. This protection also prevents the generator from
supplying an output that could potentially damage
appliances connected to the generator
circuit. If this protective shutdown should occur the Over
Speed LED will light. Contact the nearest Bryant Dealer
if this failure occurs.
3.1 FUSES
The generator panel's 15-amp fuse (Figure 2.1) protects
the DC control circuit and the battery charge circuit
against overload. This fuse is wired in series with the
battery output lead to the panel. If this fuse element has
melted open, the engine will not be able to crank or start.
The generator will also lose all battery charge
capabilities. Replace this fuse using only an identical 15-
amp replacement fuse. To replace the fuse, push the
fuse holder cap down and rotate it counterclockwise.
The generator panel's 7.5-amp fuse protects the 12 VDC
accessory socket. If the fuse element has melted open,
the 12 VDC socket will not be able to provide power to
any accessories. Replace this fuse using only an
identical 7.5-amp replacement fuse. To replace the fuse,
push the fuse holder cap down and rotate it
counterclockwise.
Oil Filter
Oil
Drain
Hose
Low Oil Switch
High Temp Switch
L
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Section 2 — Operation
Bryant Air-cooled 7 kW, 12 kW and 15 kW Generators