350-375.Monitor

ELECTRONIC CONTROL SYSTEM

CONTROLLER

Relay Box

LED's

OPERATOR'S CONSOLE

1

2

1. Monitor Panel 2. Engine Speed Dial

BACKUP SYSTEMS

ENGINE SPEED CONTROL MAN AUT

AUT PUMP CONTROL

Engine Speed Control

350/375 HYDRAULIC EXCAVATOR MONITOR

1

2

1

2

POWER TRAVEL SPEED AEC

ALARM CANCEL

WASHER WIPER

LIGHT

MONITOR PANEL

• Communicates with the controller

• Has LCD displays in place of gauges

• Has push buttons that control many machine

functions and access diagnostic procedures

• Has a three digit character readout that...

- shows engine speed dial position

- displays fault codes for controller/monitor

problems

- indicates when either or both backup

systems are activated

THE MONITOR. . .

PULSE WIDTH MODULATED (PWM) SIGNALS

DIFFERENT FREQUENCY

INPUTS TO CONTROLLER

CONTROLLER

1

2

3

4

5

6

7

₈

9

10

11

12

13

14

15

16

17

18

15. Swing Press. Switch 16. Eng. Coolant Temp. Sensor

17. Hyd. Oil Temp. Sensor 18. Fuel Level Sensor 19. Fuse Box

19

8. Speed Sensor 9. Engine 10. Start Switch 11. Attch Press Switch 12. Eng. Press. Swich 13. Travel Press. Switch 14. Impl. Press. Switch

PUMP

CONTROLLER

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

OUTPUTS FROM CONTROLLER

7. Bypass Sld 8. Spd Chg Sw 9. Gov Act Motor 10. Spd Dial Backup Sw 11. Pwshf Press Backup Sw 1. Monitor 2. Travel Alarm 3. Fault Alarm 4. Two Speed Travel Sld 5. Swing Pump Power Sld 6. Bypass Sld

12. Proport Red. Valve 13. Relay Box 14. Washer 15. Wiper 16. Boom Light 17. Boom Light 18. Chassis Light

POWER MODE SELECTION

1

2

1

2

POWER TRAVEL SPEED AEC

ALARM CANCEL

WASHER WIPER

LIGHT

12

Page:

CHAPTER : Electronic Control System

350/375/5080

Hydraulic Excavators

1

2

3

4

5

6

7

a

9

8

b

c

2. Eng. Speed Dial 3. Travel Press Switch 4. Impl Press Switch 5. Swing Press Switch 6. Attch Press Switch 7. Propor Reduc Valve 8. Engine

III II I 1 2 1 2

PUMP

ECU

POWER

lll

l

ll

SPEED DIAL LIMITS

1

2

3

4

5

6

7

8

RPM

1 800

2 950

3 1110

4 1260

5 1410

6 1570

7 1720

8 1870

350

700

850

1000

1150

1300

1450

1600

1750

375

AUTOMATIC ENGINE SPEED CONTROL (AEC)

ECU

ON

1

2

3

4

5

6

7

10

8

9

ECU

ONE-TOUCH LOW IDLE CONTROL CIRCUIT

1

2

3

4

5

6

8

9

10

7

1. Low Idle Switch 2. Engine Speed Switch 3. Impl Press Switch 4. Travel Press Switch 5. Swing Press Switch 6. Attch Press Switch 7. Gov Actuator 8. Engine 9. Speed Sensor 10. Feedback Sensor

BACKUP SYSTEM CIRCUITS

ECU

(Normal Operation)

1

2

3

4

5

6

₇

8

9

BACKUP SYSTEM CIRCUITS

ECU

(Engine Speed Dial Backup System "ON")

1

2

3

4

5

6

₇

8

9

BACKUP SYSTEM CIRCUITS

ECU

(Pump Control Backup System 'ON")

1

2

3

4

5

6

7

8

9

SERVICE FUNCTIONS

POWER

LIGHT WIPER WASHER AEC TRAVEL SPEED ALARM CANCEL 1 2 1 2

INFORMATION PROVIDED

1. Power Shift Pressure

2. Engine Speed

3. Engine Coolant Temperature

4. Hydraulic Oil Temperature

5. Analog / Digital Conversion

6. Real Time Error

7. Digital input

8. Pump Output Control

POWER

LIGHT WIPER WASHER AEC TRAVEL SPEED ALARM CANCEL 1 2 1 2

CALIBRATION MODE

INFORMATION PROVIDED

1. Machine Model and Configuration

2. Controller / Monitor Software Version

3. Error Log

4. Digital Output Test

5. PRV Sweep Test

6. Engine Speed Change

7. Fixed Power shift Pressure Setting

8. Engine RPM Display

9. Automatic Governor Actuator Calibration

10. PRV Calibration

(Condensed Supplement)

DATA MODE

1 2 12

POWER TRAVEL SPEEDAEC

ALARM CANCEL WASHER WIPER LIGHT 1 2 1 2

POWER TRAVEL SPEED _AEC

ALARM CANCEL WASHER WIPER LIGHT

1

4

7

2

5

8

3

6

9

START : Turn engine start-key on.

Press button "7" until the corresponding LED "A" starts to blink.

Maintain "7" pressed and press button "1" until "P14" (375) is displayed. To read each function below press buttons "7" & "1" once.

FUNCTION LED "ON"

(See fig) READING Power Shift Pressure

Engine RPM : Engine Off Engine Running Eng. Coolant temp. Hydraulic oil temp.

Real Time Error

1 A 1 B 1 B 1 C 4 A 4 B 2 A 2 B P 14 0 Multiply reading by 10 Centigrade Centigrade Not needed If a number appears, check the error code list Digital Input See reverse

(Condensed Supplement Cont.)

DATA MODE

1 2 12

POWER TRAVEL SPEEDAEC

ALARM CANCEL WASHER WIPER LIGHT

LED "2 B" blinking

To change readings from "0" to "p", press buttons "7" & "8" once.

DIGITAL INPUT TESTS

0 1 2 3 4 5 6 7 8 9 A B C D E F H J L n Harness code

Engine Speed Dial position Travel pressure switch

Attach. pump pressure switch (Optional) Engine oil pressure switch

Open Open Open

Low idle switch

Implement pressure switch Engine RPM back-up switch PRV Back-up switch

Open

Engine start key Switch Swing pressure switch

Alternator condition (Eng. running) Open Open Open Open 010 (350) 012 (375) 1 to 10 ON / OFF OFF ON / OFF OFF OFF OFF ON / OFF ON / OFF ON / OFF ON / OFF OFF ON ON / OFF ON OFF OFF OFF OFF

Port

Component

Indication

1 2

1 2

POWER TRAVEL SPEED AEC

ALARM CANCEL WASHER WIPER LIGHT

1

4

7

2

5

8

3

6

9

(Condensed Supplement)

CALIBRATION MODE

POWER TRAVEL SPEED AEC

ALARM CANCEL WASHER WIPER LIGHT FUNCTION LED "ON" READING 1 A 1 B 1 C PREESS BUTTON 9 1 1 4 5 5A 5 5B

Machine model 75 (375) = 75 Tons. b = Backhoe Config. Computer software 00C (for examp) C = Contr. P = Monit.

Error Log _{Hd is displayed,}

Press button "3" for ascending order, "6" for descending order. End at the end. To clear press "3", "1" and "2" simultaneously until CLr is diplayed. Digital output Test 4 4A OoF is displayed,

press button "3" for ascending order, "6" for descending order. Press "7" to check "O n / o F"

Proportional Reducing

Valve "Sweep Test" 4B Pressure changes from 0 to 32 Bar_{(in 5 sec.) and back.} Engine Speed Change

(change for test purposes)

Press button "3" to increase RPM and "6" to decrease.

(Indication X 10 = RPM) Fixed Power shift

pressure

(change for test purposes)

P25 (for exemple) is displayed, press button "3" to increse the pressure, "6" to decrease. Each touch changes 1 Bar. Press "7" to change from power shift pressure to RPM and back

( F01 - F48. Check Error code list )

START : With the engine start-key in the off position, press "9" on panel.

Maintain "9" pressed and turn start-key to on position. Continue pressing "9" till "45b" (350) "75b" (375) displayed, then start the engine.

Press button "3" to change "C" and "P" 1

2

1 2

POWER TRAVEL SPEED AEC

ALARM CANCEL WASHER WIPER LIGHT

1

4

7

2

5

8

3

6

9

(Condensed Supplement Cont.)

1 2

1 2

POWER TRAVEL SPEED AEC

ALARM CANCEL WASHER WIPER LIGHT

FUNCTION PRESS LED_"ON" READING BUTTON

2 2B

Engine Speed Dial Setting Check

2 2A

Governor calibration (Move throttle control to 10)

2A

Power shift calibration

NOTA : To end, press button "9" till monitor changes to normal or : Turn-off engine start-key.

Character displays the engine rpm value characteristic to the setting of the engine speed dial switch position Press and hold "3" and "6". AC flashing appears. While depressing "3" and "6" press "7" until display changes to ACP. Release all buttons then ACt will appear. Press "3" and "6" once more to start the Auto. Calibration Program (display will change from AC1 to AC0) If Problem : check Auto. Calibration Error Table.

"E" Displayed - Move throttle control to position 10

"1" Displayed - First calibr. - 5 kg/cm2 "2" Displayed - Sec. Calibr. - 25 kg/cm2 Press "3" to increase and "6" to decrease. Press button "7" to store the new settings in memory. Each time "7" is pressed, the display changes from first to second calibration.

1 2

1 2

POWER TRAVEL SPEED AEC

ALARM CANCEL WASHER WIPER LIGHT

1

4

7

2

5

8

3

6

9

REAL TIME ERROR CODES

* CODE No

DESCRIPTION OF PROBLEMS

E00

E01

E02

E03

E04

E05

E06

E07

E09

E10

E11

E12

E13

E14

E15

E16

E17

E18

E19

E20

E21

E25

E26

E27

E28

E29

E30

E31

E32

E33

E34

E36

E37

E38

E39

E40

E41

E48

No problem.

Engine oil pressure: Low.

Engine coolant temperature: High.

Hydraulic oil temperature: High.

Battery voltage: (Over 43 V).

Alternator terminal "R": open.

Engine speed sensor malfunction (no or low signal).

Engine speed is not normal.

Voltage of governor actuator feedback sensor: Low.

Cir. of gover. actuat. feedback sensor: Shorted/open to batt.volt.

Cir. of gover. actuat. feedback sensor: Shorted to body gnd.

Voltage of governor actuator feedback sensor: Not stable.

Circuit of governor actuator motor: Shorted to body ground.

Gover. actuat. mtr does not rotate or mtr crct.: Shorted to gnd.

Spd dial backup sw is "on" or gover. actuat. mtr. crct.: Open.

Proportional Reduction Valve (PRV) crct.: Shorted to body gnd.

PRV circuit: Shorted to battery voltage.

PRV circuit: Open.

Attach. Puls With Modulation (PWM) output: Gnd shorted.

Attach. PWM output: + B shorted.

Attach. PWM output: Open.

Crct. of eng. coolant temperature sensor: Shorted to body gnd.

Crct. of eng. coolant temp. sensor: Shorted to batt. vol. or open.

Crct. of hydraulic oil temp. sensor: Shorted to body gnd.

Crct. of hydraulic oil temp. sensor: Shoted to batt. volt or open.

Attach. PWM Input: Shorted to gnd.

Attach. PWM input: + B shorted or open.

Throttle dial and eng. rpm signals to controller: Mismatched

Dial set. and act. eng. rpm: More than 100 rpm diff.

Digital output circuit: Shorted to batt. voltage.

Gover. actuat.: No movement for 2.5 sec. after spd dial setting.

Monitor takes at least 1 sec. to respond to controller 's signal.

Monitor RAM (Random Access Memory): Not normal.

Controller feels error signal from monitor.

Monitor feels error from controller.

Controller memory: Error

Controller program indicates not-existing machine model.

Engine Stalls.

NOTE : E 33 Shows whenever a short occurs on the two-speed solenoid.

* E: In Data Mode

Left Hand Display Test Items

0 Action alarm buzzer 1 Washer Relay

Wiper Relay Boom Light Relay Chassis Light Relay

Two Speed Travel Solenoid * Open Open 5 6 7 8 9 A

DIGITAL OUTPUT TEST

b Travel Alarm Buzzer

F

Swing Control Power Solenoid

Bypass Solenoid (Bm / Travel) Open

PRV Solenoid 2 Relay (Attachment) 3 Relay (Attachment)

4 Bypass solenoid valve (Bkt/Stk)

C d E

* Only Short = Err

A C 1 A C 2

Check dial pos 2-9 Check hi RPM A C 3 Check dial pos 9-2 A C 4 Check li RPM

A C 5 Comp. prosses of inputs A C 6 Confirm dial pos 2-10 A C 7 A C 8 A C 0 Store in memory Samp data rpm ctr End * *

GOVERNOR AUTOMATIC CALIBRATION ERROR TABLE

Error

Code

- 1 Governor actuator (G / A) cable does not move freely.

- 2 The difference of the inward and outward movements of G / A are too large. - 3 G / A needs too much response time

- 4 Battery voltage is to high. - Same as Real Time Error (RTE) : E04. - 5 Voltage of G / A feedback sensor is to low. - Same as RTE : E09.

- 6 Circuit of G / A feedback sensor is shorted to batt.volt. or open. - Same as RTE : E10. - 7 Circuit of G / A feedback sensor is shorted to body ground. - Same as RTE : E11. - 8 Voltage of G / A feedback sensor is not stable. - Same as RTE : E12.

- 9 Circuit of G / A motor is shorted to body ground. - Same as RTE : E13.

- 10 G / A motor does not rotates or mtr. crct. is shorted to body gnd. - Same as RTE : E14. - 11 Speed dial backup is "ON" or G / A motor circuit is open. - Same as RTE : E15. - 12 Speed sensor circuit is open. - Same as RTE E06.

- 13 Pressure switch for implement / swing or travel is "ON." Any of controls are in act. pos. - 14 Controller program indicates non-existing machine model. - Same as RTE : E41. - 15 G / A does not move freely near LOW or HIGH idle position

- 16 G / A does not move freely near LOW IDLE position - 51 The specified high idle speed is not obtained

Description of problem

* Steps AC5/7 are completed simultaneously.

GOVERNOR CALIBRATION

SEQUENCE