Rotation Speeds; Redundant Throttle Mode; Coolant Temperature; Oil Pressure - Yanmar 6SY Series Operation Manual

Rotation Speeds

Check instruments at regular intervals.
Rotation Speed
0 - 500 rpm Prohibited engine speed,
passed through when
stopping and starting.
500 - 700 Low idle. Engine idling is
rpm controlled by the EMS / S6
control system.
700 - 2300 Normal operating speed.
rpm The engine operating speed
range is controlled by the
EMS / S6 control system.
2400 - 2600 Unsuitable operating speed.
rpm
2600 - 3000 Prohibited engine speed.
rpm

Redundant Throttle Mode

If there is a fault with the normal throttle or if
CAN communication is interrupted, a
redundant throttle system is provided.
In the event of a CAN open circuit or throttle
fault:
• The EMS automatically switches to the
redundant throttle located on the key
switch panel.
• The redundant throttle must be set at zero
to be activated.
• A light will illuminate on the panel
indicating the redundant throttle is
activated.

Coolant Temperature

Normal coolant temperature when the
engine is running is 70˚ to 90˚C
(158˚ to 194˚F).
The EMS / S6 control system has the
following alarm levels:
6SY Operation Manual
PRODUCT OVERVIEW
• If the temperature is high, 98˚ to 103˚C,
(208˚ to 217˚F) for one second, the S6
control will send a CAN message which
activates a warning.
• If the temperature exceeds 103˚C
(217˚F), a warning is activated.
• A fault code is generated in the control
unit.
After an alarm, approved values must be
registered for more than two seconds before
resetting the alarm.
NOTICE: Excessively high coolant
temperature can damage the engine.
If running for extended periods under an
extremely light load, the engine may have
difficulty in maintaining normal operating
temperature. However, the temperature will
rise to a normal level again when the load on
the engine is increased.

Oil Pressure

The EMS has the following alarm levels:
• At a speed of less than 1000 rpm and an
oil pressure of less than 1.0 bar (15 psi)
• At a speed of more than 1000 rpm and an
oil pressure of less than 2.3 bar (33 psi)
for longer than five seconds
The following functions are available if there
is an alarm:
• Alarm which only switches on a warning.
• Alarm which switches on a warning and
reduces the power if this function is
activated (maximum available is 70% of
full power).
• A fault code is generated in the control
unit.
After an alarm, approved values must be
registered for more than two seconds before
resetting the alarm.
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