SANY SY155U, Operation And Maintenance Manual, Page: 42 / 192

3-12
MACHINE CONTROLS
SY155U Excavator OMM
Regeneration Inhibit Switch
NOTICE!
Operating the machine with the regeneration
inhibit switch turned on for an extended period of
time will cause the soot level to increase and can
result in damage to the exhaust aftertreatment
system.
Use the regeneration inhibit switch (4) to deactivate
automatic regeneration. The LED status lights on the
switch will illuminate while automatic regeneration is
inhibited.
The regeneration inhibit switch should be used when the
machine is operating in an environment not suitable for
regeneration, such as in confined areas, near flammable
materials, or other areas that could create a safety
hazard. The operator should turn off the regeneration
inhibit switch as soon as possible to avoid soot buildup. If
the operator inhibits automatic regeneration for an
extended period of time, the DPF system will become
clogged, causing the machine to operate in a de-rate
mode where engine rpm and power will be reduced and
the machine will require a stationary regeneration.
NOTE: When the switch is off, all three LED status lights
on the regeneration inhibit switch are off and the engine
will perform a regeneration automatically when needed.
Auxiliary Flow Rate and Pressure Switches
The auxiliary flow rate and pressure switches control the
hydraulic flow (measured in gallons per minute [GPM] or
liters per minute [LPM], and pressure going to optional
attachments.
• Flow GPM/LPM = attachment speed.
• Pressure = attachment working force.
NOTICE!
Auxiliary flow rate and pressure adjustments need
to be made by a service technician when installing
an optional attachment. Access to the password
protected maintenance and service screen is
required for flow rate and pressure displays.
The attachment operating manual will provide these
settings. The following switches adjust the auxiliary flow
rate and pressure and are only to be used by a service
technician:
• Switch (5) decreases the hydraulic flow rate.
• Switch (12) increases the hydraulic flow rate.
• Switch (6) decreases the hydraulic pressure.
• Switch (11) increases the hydraulic pressure.
Hydraulic Travel Motor Mode Switch
Use the hydraulic travel motor mode switch (7) to select
the fast travel mode. When selected, the LED status
lights on the hydraulic travel motor mode switch are
illuminated.
NOTE: When the hydraulic travel motor mode switch is
off, the machine is in the slow travel mode and all three
LED status lights on the switch are off.
Use fast travel mode when moving the machine long
distances between work areas.
Engine Escape Mode Switch
When certain engine conditions occur, such as an
exhaust malfunction or a regeneration process is
required and not performed, the engine may operate in a
de-rate mode where engine rpm and power are reduced.
NOTICE!
Only use the engine escape mode switch for
emergencies or moving the machine for servicing.
Damage to the machine may occur if the fault causing
the engine power to de-rate is not corrected.
0003717
Figure 3-15
The engine icon (17) on the monitor will be illuminated
red when the engine is operating in a de-rate power
mode. Under emergency situations, or moving the
machine for servicing, you can temporarily disable the
engine power restrictions using the engine escape mode
switch (8). When the escape mode is activated, the
engine icon (17) will change from red to green.
Manual Regeneration Switch
Typically, regeneration occurs automatically with no
operator interaction required. However, if for some
reason the automatic regeneration process is interrupted
or the regeneration inhibit switch is activated for an
extended period of time, soot will build up and increase
exhaust back pressure. Eventually, the DPF system will
become clogged and the manual regeneration icon (18)
will flash yellow, indicating that a manual regeneration
must be initiated. Use the manual regeneration switch (9)
to initiate a stationary regeneration. See “Manual
Regeneration” on page 4-20.
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