SANY Crawler Hydraulic Excavator SY195C9, SY205C9, SY215C9, SY225C9. Service Manual - page 18

4-191

Structure and Function

Function

●

Set the maximum engine speed under
each working mode. This set speed is the
standard to control engine speed.

Operation

●

Calibrating procedure for positive 

fl

 ow exca-

vators.

1) Selection of fixing point of throttle motor

soft shaft

2) H, S, L maximum speed calibration, and A/

I speed calibration.

3) Turn the dial on the calibrator counter-

clockwise to the end

4) Power OFF

5) Set the calibrator to "Monitor mode", power

on and check the result.

Remark:

Memory SW up: Calibration mode;

Memory SW down: Monitor mode

For more information, see “Engine Speed - 
Test and Calibrate” on page 6-3.

4-192

Structure and Function

4.9.11 Electrical Components

Operation

●

The relationship between the pressure ap-
plied on the sensor (P) and output voltage
(E) is shown in the right diagram.

ZX215-1002209

(V)

(MPa)

Sensor output voltage (E)

Oil pressure (P)

4.9.11.1  Pump pressure sensor

ZX305-1002066

A

B

C

Terminal A

Terminal B

Terminal C

Connection diagram

Signal name

PWR +5V

Output

No.

4-193

Structure and Function

4.9.11.2  Pilot pressure sensor

Operation

●

The relationship between the pressure ap-
plied on the sensor (P) and output voltage
(E) is shown in the right diagram.

ZX215-1002210

(V)

(MPa)

Sensor output voltage (E)

Oil pressure (P)

ZX305-1002066

A

B

C

Terminal A

Terminal B

Terminal C

Connection diagram

Signal name

PWR +5V

Output

No.

Structure and Function

4.9.11.3  Engine speed sensor

Operation

●

Measure the resistance between terminal
1 and terminal 2 when it is in service.

Standard value (@25°C)

2.3±0.2 k

Ω

●

If the measured value exceeds the stan-
dard value, replace the sensor.

Function

●

The engine revolution sensor is installed to
the ring gear of the engine 

fl

 ywheel. It elec-

trically calculates the number of the gear
teeth which pass in front of it and transmits
the result to the engine controller.

ZX215-1002211

1

2

 

CAUTION

●

If the engine speed sensor is not tight-
ened to the specifi ed torque, the sensor
may send out no signals. Tighten the
engine speed sensor to the specified
torque.

4-195

Structure and Function

4.9.11.4  Coolant temperature sensor

1)

Sensor

2)

Connector

Function

●

The output resistance of the engine cool-
ant temperature sensor changes with the
coolant temperature. The controller collects
and processes coolant temperature signals
and works out the coolant temperature.

Standard 

value

50°C

80

Ω

 (Ref.)

60°C

56.3

Ω

80°C

29.5±10

Ω

100°C

16.5

Ω

106°C

14.3±0.5

Ω

120°C

10

Ω

(Ref.)

Specifi cations

ZX215-1002212

1

2

4-196

Structure and Function

ZX215-1002246

1

2

3

4

4.9.11.5  Fuel level sensor

1)

Float

2)

Lever

3)

Casing

4)

Coupler

4-197

Structure and Function

4.9.11.6  Oil pressure switch

1)

O-ring

2)

Sensor

3)

Connector

Function

●

The oil pressure switch is installed on the
outlet circuit of the oil filter. It detects oil
pressure and transmits warning signals to
the controller.

Specifi cations

●

Type of contact: Normally closed type

●

Operating pressure: 1.9kg

ZX215-1002214

1

2

3

Pressure

Load

4-198

Structure and Function

4.10  

Monitoring System

●

The state of the machine is monitored
by the sensors mounted on the machine
components. The controller processes the
signals and transmits the signals to the
monitor display, informing the operator of
the machine condition.

●

Information on the monitor display includes
primarily:

1. Alert information when a machine fault is

detected.

2. Operating condition (coolant temperature,

fuel level, etc. )

●

The machine control system can be oper-
ated using the switches and keys on the
monitor panel.

W13053001

CAN signal

Sensor

Controller

Power

Battery

Monitor

4-199

Structure and Function

4.10.1  

Machine monitor

Outline

●

The monitor displays various kinds of items
and is used by the operator to select a
working mode.

●

The monitor has a CPU which processes,
displays, and outputs information.

●

The monitor has an LCD (Liquid Crystal
Display) screen.

NOTE:

●

The LCD may have black spots (which do
not light up) or bright spots (which stay on).
Products having 10 or less black or bright
spots conform to the product speci

fi

 cation;

such condition is quite normal.

●

Continuous operation of the monitor may
cause the LCD to display bright blue spots
on a black background; it is quite normal.

Input and output signals

No.

Signal name

Input/output

1

Digital input A

Input

3

CAN high

4

CAN low

7

Digital input B

8

Trigger power source (24V)

9

Power source (24V)

10

Grounding 

11

Digital input C

12

Grounding 

●

When the monitor is turned on, blinking
strips may appear on the LCD screen.
This is normal.

$

%

F1

F2

F3

F4

F5

Esc

Enter

WX215-1204002H

4-200

Structure and Function

4.10.2  

Monitor functions

The front side of the machine monitor is made 
up of three sections: 

A. Warning and signal indicators

B. Display screen

C. Key pad

$

%

F1

F2

F3

F4

F5

Esc

Enter

XP13031506

A

B

C

Warning and signal indicators

●

When a machine fault occurs, the warning
indicator lights up, reminding the user to
check and address the fault.

$

%

XP13031505

4-201

Structure and Function

Screen display

The LCD display is where monitor items are 
shown. This display is also the interface where 
most monitor operations are performed. Items 
on a normal operation display include: 

1. Working mode indicator

2. Coolant temperature gage

3. Fuel level gage

4. Failure code

5. Total service hours

6. Function icons

7. System time (Hr: Min: Sec)

8. Date (YY:MM:DD)

9. GPS signal

10. Engine speed level (1 to 11)

Key pad

The key pad is composed of 5 function keys 
and six navigation keys. 

F1

F2

F3

F4

F5

Esc

Enter

1

2

XP13031502

Sany Hydraulic Excavator

n/min

AUTO

6

(

K

P

C

H

F

E

6

XP13032601

1

2

3

4
5

6

7

8

9

10

4-202

Structure and Function

1. Function keys

Functions of the 

fi

 ve keys (

F1

, 

F2

, 

F3

, 

F4

, 

F5

) are indicated by the function icons above them 

on the screen.

Function keys and icons

NOTE: When no icon is displayed above a function key, this key is disabled.

Function key

Icon

Function

Operation interface

F1

S

, 

H

L

, 

B

Working mode selection

Home page

Select the next item;
Go to the next page;
Increase password value

Information Menu page
Engine and Throttle Signal page, etc.
Password Entry page

Save

System Time Calibration page, etc.

Lower monitor brightness

Brightness Adjustment page

F2

n/min

AUTO

 or 

n/min

Switch between Auto idle and Non 
auto idle

Home page

Move the cursor to the right

Password Entry page

Enter a selected entry

Information Menu page, etc.

Increase monitor brightness

Brightness Adjustment page

F3

 or 

Switch between High and Low 
travel speed

Home page

Password validation

Password Entry page

Con

fi

 rm the validity of a password 

and, if it’s correct, enter the de-
sired page.
Save monitor brightness

Password Entry page

Brightness Adjustment page

F4

Go to “Fault Information” page
Enter/Con

fi

 rm

Home page
Same as 

Enter

Go to Brightness Adjustment page Password Entry page

Go to System Setup page

Information Menu page

F5

Go to Information Menu

Home page

Return to Home page, Information 
Menu or System Setup page

Password Entry page, etc.

Save

Machine Con

fi

 guration Calibration 

page

Go to System Unlock page

Lockout Information page

4-203

Structure and Function

Navigation keys

Function

Enter

Enter/Con

fi

 rm

ESC

Return

Select the item above (returns to the bottom item after the top item); or increase the 
value where the cursor blinks.
Select the item below (returns to the top item after the bottom item); or decrease the 
value where the cursor blinks.

Move the cursor to the left  (returns to the right end digit after the left end digit).

Move the cursor to the right (returns to the left end digit after the right end digit).

2. Navigation keys

4.10.3  

Monitor operation

1. Home page

The Home page is the normal operation display of the monitor. Items on this page include: 
truck load counter, working mode, speed level, coolant temperature, fuel level, service hours, 
clock, fault code, etc.. 

Operation

Working mode selection (1)

●

Press 

F1

 switch between S, H. L and B

mode.

NOTE: S mode is the default working
mode.

Auto-idle and Non auto-idle mode (2)

●

Press 

F2

 to switch between auto-idle and

Non auto-idle mode.

Auto-idle mode is indicated by 

n/min

AUTO

.

Non auto-idle mode is indicated by

n/min

.

NOTE: Auto-idle mode is the default mode.

Sany Hydraulic Excavator

n/min

AUTO

6

(

K

P

C

H

F

E

6

XP13032602

4-204

Structure and Function

When neither of the joysticks are operated 
for 5 seconds, the engine enters the idling 
state automatically in order to save fuel 
and reduce noise. 

High and low travel speed (3)

●

Press 

F3

 to switch between high and low

travel speed.

High travel speed is indicated by 

.

Low travel speed is indicated by 

.

NOTE: Default travel speed is Low.

Fault Information (4)

●

Press 

F4

 to go to “Fault Information” when

a fault occurs.

NOTE: When the ECU detects an error in
the machine, a fault code will appear on
the monitor display. The tick icon on the
bottom will turn red.

Information Menu (5)

●

Press 

F5

 to go to the Password Entry

page before accessing the “Information
Menu” page.

4-205

Structure and Function

2. Information Menu password entry

A 5-digit password is required to access the 
“Information Menu”. You can ask your local 
dealer to obtain this password.

Operation

1. Press 

F1

 to change the number where the

cursor blinks in an ascending order. You
can also use 

 or 

 to increase or de-

crease the number.

2. Press 

F2

 to move the cursor to the right.

You can also use 

 or 

 to move the

cursor to the left or to the right.

NOTE: The cursor moves back to the left
end side after the right end side.

3. When all the five digits of the password

have been entered, press 

F3

 or 

Enter

. If the

password is correct, the display moves to
the “Information Menu” page; if not, please
try again.

4. Press 

F5

 or 

ESC

 to return to the Home

page.

5. Press 

F4

 on this page to go to Brightness

Adjustment page.

Please enter the password

XP13031501

Information Menu

4-206

Structure and Function

3. Information Menu

The information menu is a list of system func-
tions. On this page, you can select and access 
any of the items on the list.

Operation

●

Press 

F1

 to select the item below the high-

lighted one. The highlighter returns to the
top after the bottom item. You can also use

 and 

 to move the highlighter up and 

down.

●

Press 

F2

 or 

Enter

 to access the selected en-

try.

●

Press 

F5

 or 

ESC

 to return to the Home

page.

●

Press 

F4

 on this page to go to the Pass-

word Entry page before accessing the Sys-
tem Setup page.

NOTE: Once an entry on the list is highlighted, 
an introductory hint will appear on the bottom 
of the display giving a short description of the 
selected entry. These hints include: 

●

Running parameters of the engine, main
pup and main valve

●

Fault code and description

●

Throttle installation assistance

●

System language selection

●

System time setup

●

GPS monitoring information

XP1251203007

Engine, pump and valve parameters

Running parameter

Fault information

Throttle installation

System language

System time setup

GPS monitoring

Information Menu