SANY Crawler Hydraulic Excavator SY365H-9, SY365BH-9. Shop Manual (2014)

7-27

Troubleshooting

SY365(B)H-9 Crawler Hydraulic Excavator

E015 Power voltage abnormal

Failure code

Failure

symptom

Power voltage abnormal

E015

Failure description

Voltage of power supply is higher than 36V during machine operation.

Controller reaction

Driving of motor and solenoid valve is cut off automatically by the system.

Machine symptom

Engine fails to accelerate and machine moves slowly.

Possible causes and standard values

Cause

Standard values and troubleshooting references

Power fail-

ure

★

Turn the start switch to the OFF position and leave it in the position for trouble-

shooting.

Check battery voltage.

Volt

Under 25 V

Alternator

abnormal

★

Turn the start switch to the OFF position before proceeding. Turn the start

switch to the START position for trouble shooting.

Measure between alternator terminal B and ground.

Volt

Around 28 V

TERMINAL

HEAT

OFF

START

BR ACC R1 R2 C

11b

ZX225-1105002

Start switch

Battery relay

Delay relay

Safety relay

Start motor

Alternator

Charging indicator

Fig. 7-13

7-28

Troubleshooting

SY365(B)H-9 Crawler Hydraulic Excavator

E212 Irregular throttle motor current or defective motor connection

50A#

507#

MT-

00A
MT+

CN-124M

ZX225-1105001

Controller

Sensor

Throttle feedback volt

MT-

GND

MT+

Throttle motor

Operator station

Chassis harness

Green

White

Red

Yellow

Blue

Failure code

Failure symptom

Throttle motor loading circuit is abnormal and the engine
acceleration fails.

E212

Failure description

Motor feedback voltage is lower than 0.25V or higher than 4.75V

Controller reaction

The controller stops the motor driving system when this failure is detected.

Symptom on machine Engine acceleration fails and the machine acts slowly. .

Possible causes and standard values

Cause

Standard values and troubleshooting references

Failure of throttle
motor coil

Turn engine start switch to the OFF position before troubleshooting.
Keep it in the OFF position while troubleshooting is performed.

Between

and

of CN-124M

Resistance

12.2

2 Open circuit of har-

ness

Turn engine start switch to the OFF position before troubleshooting.
Keep it in the OFF position while troubleshooting is performed.

Unplug the controller and measure the resistance
between the pins 32 and 33.

Resistance

12.2

Short circuit of har-
ness (grounded)

Turn engine start switch to the OFF position before troubleshooting.
Keep it in the OFF position while troubleshooting is performed.

Unplug the connector CN-124M and measure the
resistance between motor

(

) and the hous-

ing.

Resistance Above 2M

Internal failure of
controller

No troubleshooting can be done for failure occurs in the inner of controller.
(Except for the above reasons, the controller must be replaced in case of
failure.)

Fig. 7-14

7-29

Troubleshooting

SY365(B)H-9 Crawler Hydraulic Excavator

E240 Hydraulic oil temperature abnormal

CN-113M

CN-115F

511

ZX225-1105016

Controller

Hyd oil temp sensor

240 ohms

Signal

24V PWR

Operator station

Chassis harness

yd au c o te pe atu e ab o

Failure code

Failure symptom

Hydraulic oil temperature is abnormal. Only
alarm output is effective.

E240

Failure description

Controller detects a temperature resistance of hydraulic oil that is lower than
10 ohms or higher than 120 ohms and it lasts more than 3s.

Controller reaction

Only alarm output is effective. The alarm resets automatically when conditions
become normal.

Symptom on machine

——

Possible causes and standard values

Cause

Standard values and troubleshooting references

Failure of sen-

sor

Turn the start switch to the OFF position and then keep it in the ON
position to perform troubleshooting.

Between CN-113M

and ground

Voltage

0.2-4.75V

Open circuit of

harness

Turn engine start switch to the OFF position before troubleshooting.
Keep it in the OFF position while troubleshooting is performed.

Between CN-113M

and pin 21 of controller Resistance

Under 1

Short circuit

of harness

(grounded)

Turn engine start switch to the OFF position before troubleshooting.
Keep it in the OFF position while troubleshooting is performed.

Between CN-113M

and ground

Resistance Above 1M

Failure of 24V

power supply

Turn engine start switch to OFF position. Keep it at ON position to per-
form troubleshooting.

Between CN-113M

and ground

Voltage

About 24V

Fig. 7-15

7-30

Troubleshooting

SY365(B)H-9 Crawler Hydraulic Excavator

E320 Front pump output pressure abnormal

Failure code

Failure symptom

Front pump output pressure is abnormal. Only
alarm output is effective.

E320

Failure description

A pressure feedback voltage other than 0.25 – 4.75V keeps more than 200
msec when the power is on.

Controller reaction

Only alarm output is effective.

Symptom on machine

——

Possible causes and standard values

Cause

Standard values and troubleshooting references

Failure of 5V

power supply

Turn engine start switch to the OFF position before troubleshooting.
Keep it in the ON position while troubleshooting is performed.

Between CN-151M A and B

Voltage

About 5V

Open circuit of

signal line

Turn engine start switch to the OFF position before troubleshooting.
Keep it in the OFF position while troubleshooting is performed.

Between CN-151M C and pin 29 of controller

Resistance

Under 1

Between CN-115M B and ground

Under 1

Short circuit

of signal line

(grounded)

Turn engine start switch to the OFF position before troubleshooting.
Keep it in the OFF position while troubleshooting is performed.

Between CN-151M C and ground

Resistance

Above 2M

Failure of sen-

sor

Turn engine start switch to the OFF position before troubleshooting.
Turn the start switch to the ON position and keep it in the ON position
while troubleshooting is performed.

Between CN-151M C and ground

Voltage

0.5±0.2V

5 V

CN-151M

501#

00#

50#

ZX225-1105003

Controller

Front pump
press. sensor

Front pump signal
collecting port

GND

5V PWR

Operator station

Chassis harness

Signal

GND

Fig. 7-16

7-31

Troubleshooting

SY365(B)H-9 Crawler Hydraulic Excavator

E321 Rear pump output pressure abnormal

Failure code

Failure symptom

Reading of rear pump output pressure is abnor-
mal. Only alarm output is effective. .

E321

Failure description

A pressure feedback voltage other than 0.25 – 4.75V keeps more than 200
msec when the power is on.

Controller reaction

Only alarm output is effective.

Symptom on machine

——

Possible causes and standard values

Cause

Standard values and troubleshooting references

Failure of 5V

power supply

Turn engine start switch to the OFF position before troubleshooting.
Turn the start switch to the ON position and keep it in the ON position
while troubleshooting is performed.

Between CN-116M A and B

Voltage

About 5V

Open circuit of

signal line

Turn engine start switch to the OFF position before troubleshooting.
Keep it in the OFF position while troubleshooting is performed.

Between CN-116M C and pin 19 of controller

Resistance

Under 1

Between CN-116M B and ground

Under 1

Short circuit

of signal line

(grounded)

Turn engine start switch to the OFF position before troubleshooting.
Keep it in the OFF position while troubleshooting is performed.

Between CN-116M C and ground

Resistance Above 2M

Failure of sen-

sor

Turn engine start switch to the OFF position before troubleshooting.
Turn the start switch to the ON position and keep it in the ON position
while troubleshooting is performed.

Between CN-116M C and ground

Voltage

0.5±0.2V

5 V

CN-116M

ZX225-1105004

502#

00#

50#

Controller

Rear pump signal
collecting port

GND

5V PWR

Rear pump
press. sensor

Signal

GND

Operator station

Chassis harness

Fig. 7-17

7-32

Troubleshooting

SY365(B)H-9 Crawler Hydraulic Excavator

E322 Bucket-dig pilot pressure abnormal

Failure code

Failure symptom

Bucket-dig pilot pressure is abnormal. Only alarm
output is effective. .

E322

Failure description

A pressure feedback voltage other than 0.25 – 4.75V keeps more than 200
msec when the power is on.

Controller reaction

Only alarm output is effective.

Symptom on machine

The bucket-dig motion is slow.

Possible causes and standard values

Cause

Standard values and troubleshooting references

Failure of 5V

power supply

Turn engine start switch to the OFF position before troubleshooting. Turn
the start switch to the ON position and keep it in the ON position while
troubleshooting is performed.

Between CN-124M A and B

Voltage

About 5V

Open circuit

of signal line

Turn engine start switch to the OFF position before troubleshooting.
Keep it in the OFF position while troubleshooting is performed.

Between CN-124M C and pin 10 of controller

Resistance

Under 1

Between CN-124M B and ground

Under 1

Short circuit

of signal line

(grounded)

Turn engine start switch to the OFF position before troubleshooting.
Keep it in the OFF position while troubleshooting is performed.

Between CN-124M C and ground

Resistance Above 2M

Failure of

sensor

Turn engine start switch to the OFF position before troubleshooting. Turn
the start switch to the ON position and keep it in the ON position while
troubleshooting is performed.

Between CN-124M C and ground

Voltage

0.5±0.2V

5 V

CN-124M

205#

00#

50#

ZX225-1105005

Controller

Bucket-dig pilot press.
signal collecting port

GND

5V PWR

Bucket-dig pilot
pressure sensor

Operator station

Chassis harness

Signal

GND

Fig. 7-18

7-33

Troubleshooting

SY365(B)H-9 Crawler Hydraulic Excavator

E323 Bucket-dump pilot pressure abnormal

Failure code

Failure symptom

Reading of bucket-dump pilot pressure is abnor-
mal. Only alarm output is effective.

E323

Failure description

A pressure feedback voltage other than 0.25 – 4.75V keeps more than 200
msec when the power is on.

Controller reaction

Only alarm output is effective.

Symptom on machine

Bucket-dump motion is slow.

Possible causes and standard values

Cause

Standard values and troubleshooting references

Failure of 5V

power supply

Turn engine start switch to the OFF position before troubleshooting. Turn
the start switch to the ON position and keep it in the ON position while
troubleshooting is performed.

Between CN-128M A and B

Voltage

About 5V

Open circuit

of signal line

Turn engine start switch to the OFF position before troubleshooting.
Keep it in the OFF position while troubleshooting is performed.

Between CN-128M C and pin 33 of controller

Resistance

Under 1

Between CN-128M B and ground

Under 1

Short circuit

of signal line

(grounded)

Turn engine start switch to the OFF position before troubleshooting.
Keep it in the OFF position while troubleshooting is performed. .

Between CN-128M C and ground

Resistance

Above 2M

Failure of sen-

sor

Turn engine start switch to the OFF position before troubleshooting. Turn
the start switch to the ON position and keep it in the ON position while
troubleshooting is performed.

Between CN-128M C and ground

Voltage

0.5±0.2V

5 V

CN-128M

204#

00#

50#

ZX225-1105006

Controller

Bucket-dump pilot press.
signal collecting port

GND

5V PWR

Bucket-dump pilot
pressure sensor

Operator station

Chassis harness

Signal

GND

Fig. 7-19

7-34

Troubleshooting

SY365(B)H-9 Crawler Hydraulic Excavator

E324 Arm-in pilot pressure abnormal

5 V

CN-129M

ZX225-1105007

203#

00#

50#

Controller

Arm-in pilot pressure
signal collecting port

GND

5V PWR

Arm-in pilot
press. sensor

Signal

GND

Operator station

Chassis harness

Failure code

Failure symptom

Reading of Arm-in pilot pressure is abnormal. Only
alarm output is effective. .

E324

Failure description

A pressure feedback voltage other than 0.25 – 4.75V keeps more than 200 msec
when the power is on.

Controller reaction

Only alarm output is effective.

Symptom on machine

Arm-in motion is slow.

Possible causes and standard values

Cause

Standard values and troubleshooting references

Failure of 5V

power supply

Turn engine start switch to the OFF position before troubleshooting. Turn
the start switch to the ON position and keep it in the ON position while
troubleshooting is performed.

Between CN-129M A and B

Voltage

About 5V

Open circuit

of signal line

Turn engine start switch to the OFF position before troubleshooting.
Keep it in the OFF position while troubleshooting is performed.

Between CN-129M C and controller pin 35

Resistance

Under 1

Between CN-129M B and ground

Under 1

Short circuit

of signal line

(grounded)

Turn engine start switch to the OFF position before troubleshooting.
Keep it in the OFF position while troubleshooting is performed.

Between CN-129M C and ground

Resistance

Above 2M

Failure of

sensor

Turn engine start switch to the OFF position before troubleshooting. Turn
the start switch to the ON position and keep it in the ON position while
troubleshooting is performed.

Between CN-129M C and ground

Voltage

0.5±0.2V

Fig. 7-20

7-35

Troubleshooting

SY365(B)H-9 Crawler Hydraulic Excavator

E325 Arm-out pilot pressure abnormal

Failure code

Failure symptom

Reading of Arm-out pilot pressure is abnormal.
Only alarm output is effective. .

E325

Failure description

A pressure feedback voltage other than 0.25 – 4.75V keeps more than 200
msec when the power is on.

Controller reaction

Only alarm output is effective.

Symptom on machine

Arm-out motion is slow.

Possible causes and standard values

Cause

Standard values and troubleshooting references

Failure of 5V

power supply

Turn engine start switch to the OFF position before troubleshooting.
Turn the start switch to the ON position and keep it in the ON position
while troubleshooting is performed.

Between CN-122M A and B

Voltage

About 5V

Open circuit

of signal line

Turn engine start switch to the OFF position before troubleshooting.
Keep it in the OFF position while troubleshooting is performed.

Between CN-122M C and pin 22 of controller

Resistance

Under 1

Between CN-122M B and ground

Under 1

Short circuit

of signal line

(grounded)

Turn engine start switch to the OFF position before troubleshooting.
Keep it in the OFF position while troubleshooting is performed.

Between CN-122M C and ground

Resistance Above 2M

Failure of

sensor

Turn engine start switch to the OFF position before troubleshooting.
Turn the start switch to the ON position and keep it in the ON position
while troubleshooting is performed.

Between CN-122M C and ground

Voltage

0.5±0.2V

5 V

CN-122M

202#

00#

50#

ZX225-1105008

Controller

Arm-out pilot pressure
signal collecting port

GND

5V PWR

Arm-out pilot
press. sensor

Signal

GND

Operator station

Chassis harness

Fig. 7-21

7-36

Troubleshooting

SY365(B)H-9 Crawler Hydraulic Excavator

E326 Boom-up pilot pressure abnormal

Failure code

Failure symptom

Reading of boom-up pilot pressure is abnormal.
Only alarm output is effective. .

E326

Failure description

A pressure feedback voltage other than 0.25 – 4.75V keeps more than 200 msec
when the power is on.

Controller reaction

Only alarm output is effective.

Symptom on machine

Boom-up motion is slow.

Possible causes and standard values

Cause

Standard values and troubleshooting references

Failure of 5V

power supply

Turn engine start switch to the OFF position before troubleshooting. Turn
the start switch to the ON position and keep it in the ON position while
troubleshooting is performed.

Between CN-126M A and B

Voltage

About 5V

Open circuit

of signal line

Turn engine start switch to the OFF position before troubleshooting.
Keep it in the OFF position while troubleshooting is performed.

Between CN-126M C and controller pin 8.

Resistance

Under 1

Between CN-126M B and ground

Under 1

Short circuit

of signal line

(grounded)

Turn engine start switch to the OFF position before troubleshooting.
Keep it in the OFF position while troubleshooting is performed.

Between CN-126M C and ground

Resistance

Above 2M

Failure of

sensor

Turn engine start switch to the OFF position before troubleshooting. Turn
the start switch to the ON position and keep it in the ON position while
troubleshooting is performed.

Between CN-126M C and ground

Voltage

0.5±0.2V

5 V

ZX225-1105009

206#

CN-126M

00#

50#

Controller

Boom-up pilot pressure
signal collecting port

GND

5V PWR

Boom-up pilot
press. sensor

Operator station

Chassis harness

Signal

GND

Fig. 7-22

7-37

Troubleshooting

SY365(B)H-9 Crawler Hydraulic Excavator

E327 Boom-down pilot pressure abnormal

Failure code

Failure symptom

Reading of boom-down pilot pressure is abnor-
mal. Only alarm output is effective. .

E327

Failure description

A pressure feedback voltage other than 0.25 – 4.75V keeps more than 200
msec when the power is on.

Controller reaction

Only alarm output is effective.

Symptom on machine

Boom-down motion is slow.

Possible causes and standard values

Cause

Standard values and troubleshooting references

Failure of 5V

power supply

Turn engine start switch to the OFF position before troubleshooting.
Turn the start switch to the ON position and keep it in the ON position
while troubleshooting is performed.

Between CN-125M A and B

Voltage

About 5V

Open circuit

of signal line

Turn engine start switch to the OFF position before troubleshooting.
Keep it in the OFF position while troubleshooting is performed.

Between CN-125M C and controller pin 9

Resistance

Under 1

Between CN-125M B and ground

Under 1

Short circuit

of signal line

(grounded)

Turn engine start switch to the OFF position before troubleshooting.
Keep it in the OFF position while troubleshooting is performed.

Between CN-125M C and ground

Resistance Above 2M

Failure of

sensor

Turn engine start switch to the OFF position before troubleshooting.
Turn the start switch to the ON position and keep it in the ON position
while troubleshooting is performed.

Between CN-125M C and ground

Voltage

0.5±0.2V

5 V

CN-125M

ZX225-1105010

207#

00#

50#

Controller

Boom-down pilot pressure
signal collecting port

GND

5V PWR

Boom-down pilot
press. sensor

Operator station

Chassis harness

Signal

GND

Fig. 7-23

7-38

Troubleshooting

SY365(B)H-9 Crawler Hydraulic Excavator

E328 Left travel pilot pressure abnormal

Failure code

Failure symptom

Reading of left travel pilot pressure is abnormal.
Only alarm output is effective. .

E328

Failure description

A pressure feedback voltage other than 0.25 – 4.75V keeps more than 200
msec when the power is on.

Controller reaction

Only alarm output is effective.

Symptom on machine

Left travel speed is low. Travel deviates.

Possible causes and standard values

Cause

Standard values and troubleshooting references

Failure of 5V

power supply

Turn engine start switch to the OFF position before troubleshooting. Turn
the start switch to the ON position and keep it in the ON position while
troubleshooting is performed.

Between CN-120M A and B

Voltage

About 5V

Open circuit of

signal line

Turn engine start switch to the OFF position before troubleshooting.
Keep it in the OFF position while troubleshooting is performed.

Between CN-120M C and pin 34 of controller

Resistance

Under 1

Between CN-120M B and ground

Under 1

Short circuit

of signal line

(grounded)

Turn engine start switch to the OFF position before troubleshooting.
Keep it in the OFF position while troubleshooting is performed.

Between CN-120M C and ground

Resistance Above 2M

Failure of sen-

sor

Turn engine start switch to the OFF position before troubleshooting. Turn
the start switch to the ON position and keep it in the ON position while
troubleshooting is performed.

Between CN-120M C and ground

Voltage

0.5±0.2V

5 V

CN-120M

200#

00#

50#

ZX225-1105011

Controller

Left travel pilot press.
signal collecting port

GND

5V PWR

Left travel pilot
pressure sensor

Signal

GND

Operator station

Chassis harness

Fig. 7-24

7-39

Troubleshooting

SY365(B)H-9 Crawler Hydraulic Excavator

E329 Right travel pilot pressure abnormal

Failure code

Failure symptom

Reading of right travel pilot pressure is abnormal.
Only alarm output is effective. .

E329

Failure description

A pressure feedback voltage other than 0.25 – 4.75V keeps more than 200
msec when the power is on.

Controller reaction

Only alarm output is effective.

Symptom on machine

Right travel speed is low. Travel deviates.

Possible causes and standard values

Cause

Standard values and troubleshooting references

Failure of 5V

power supply

Turn engine start switch to the OFF position before troubleshooting. Turn
the start switch to the ON position and keep it in the ON position while
troubleshooting is performed.

Between CN-121M A and B

Voltage

About 5V

Open circuit of

signal line

Turn engine start switch to the OFF position before troubleshooting.
Keep it in the OFF position while troubleshooting is performed.

Between CN-121M C and pin 30 of controller

Resistance

Under 1

Between CN-121M B and ground

Under 1

Short circuit

of signal line

(grounded)

Turn engine start switch to the OFF position before troubleshooting.
Keep it in the OFF position while troubleshooting is performed.

Between CN-121M C and ground

Resistance Above 2M

Failure of sen-

sor

Turn engine start switch to the OFF position before troubleshooting. Turn
the start switch to the ON position and keep it in the ON position while
troubleshooting is performed.

Between CN-121M C and ground

Voltage

0.5±0.2V

5 V

CN-121M

201#

00#

50#

ZX225-1105012

Controller

Right travel pilot press.
signal collecting port

GND

5V PWR

Right travel pilot
pressure sensor

Signal

GND

Operator station

Chassis harness

Fig. 7-25

7-40

Troubleshooting

SY365(B)H-9 Crawler Hydraulic Excavator

E330 Swing pilot pressure abnormal

Possible causes and standard values

Cause

Standard values and troubleshooting references

Failure of 5V

power supply

Turn engine start switch to the OFF position before troubleshooting. Turn
the start switch to the ON position and keep it in the ON position while
troubleshooting is performed.

Between CN-123M A and B

Voltage

About 5V

Open circuit of

signal line

Turn engine start switch to the OFF position before troubleshooting.
Keep it in the OFF position while troubleshooting is performed.

Between CN-123M C and pin 18 of controller

Resistance

Under 1

Between CN-123M B and ground

Under 1

Short circuit

of signal line

(grounded)

Turn engine start switch to the OFF position before troubleshooting.
Keep it in the OFF position while troubleshooting is performed.

Between CN-123M C and ground

Resistance Above 2M

Failure of sen-

sor

Turn engine start switch to the OFF position before troubleshooting. Turn
the start switch to the ON position and keep it in the ON position while
troubleshooting is performed.

Between CN-123M C and ground

Voltage

0.5±0.2V

Failure code

Failure symptom

Reading of swing pilot pressure is abnormal. Only
alarm output is effective. .

E330

Failure description

A pressure feedback voltage other than 0.25 – 4.75V keeps more than 200
msec when the power is on.

Controller reaction

Only alarm output is effective.

Symptom on machine

Swinging motion is slow.

5 V

CN-123M

208#

00#

50#

ZX225-1105013

Controller

Swing pilot pressure
signal collecting port

GND

5V PWR

Swing pilot pressure sensor

Operator station

Chassis harness

Signal

GND

Fig. 7-26

7-41

Troubleshooting

SY365(B)H-9 Crawler Hydraulic Excavator

E332 Motor built-in potentiometer irregular

Failure code

Failure symptom

The potentiometer built in the motor is irregular. It returns

to auto deceleration when time point is detected.

E332

Failure description

When machine power is on, throttle position feedback has a voltage other than

0.25-4.75V lasting more 50 msec.

Controller reaction

Returns to auto deceleration.

Symptom on machine

The throttle fails to increase engine speed.

Possible causes and standard values

Causes

Standard values and troubleshooting references

Failure of

5V power

source

Turn the start switch to the OFF position and then keep it in the ON position
to perform troubleshooting.

Between CN-155M

and

Volt

About 5V

Open circuit

of signal

line

Turn the start switch to the OFF position before troubleshooting. Kee the
switch in the OFF position to perform troubleshooting.

Between CN-155M

and the controller port pin 7

Resistance

Under 1

Between CN-155M

and ground

Under 1

Short cuit of

signal line

(grounded)

Turn the start switch to the OFF position before troubleshooting. Kee the
switch in the OFF position to perform troubleshooting.

Between CN-155M

and ground

Resistance

Above 2M

CN-113

CN-502

ZX225-1105045

507#

00A#

50A#

507#

00A#

50A#

CN-155M

507#

00A#

50A#

507#

00A#

50A#

Controller CN-142M

Throttle position
feedback

GND

Sensor 5V

Throttle position

Operator station

Chassis harness

Throttle
position

GND

Fig. 7-27

7-42

Troubleshooting

SY365(B)H-9 Crawler Hydraulic Excavator

E434 Front pump proportional solenoid current abnormal (A)

Failure code

Failure symptom

Front pump proportional solenoid current is abnor-
mal. The system operates slowly.

E434

Failure description

Abnormality occurs in loaded circuit of proportional solenoid. Current which is
above 1.3A lasts for 3 second. Differential current occurs in drive protection
loop.

Controller reaction

Stop the solenoid when failure is detected. Power supply must be restored.

Symptom on machine System operates slowly.

Possible causes and standard values

Cause

Standard values and troubleshooting references

Open circuit of
harness

Turn engine start switch to the OFF position before troubleshooting.
Keep it in the OFF position while troubleshooting is performed.

Between CN-111F

and pin 28 of controller

Resistance

Under 1

Between CN-111F

and ground

Under 1

Short circuit
of harness
(grounded)

Turn engine start switch to the OFF position before troubleshooting.
Keep it in the OFF position while troubleshooting is performed.

Between CN-111F

and wire 0#

Resistance Above 1M

Failure of pro-
portional valve
coil

Turn engine start switch to the OFF position before troubleshooting.
Keep it in the OFF position while troubleshooting is performed.

Unplug the connector CN-111F, and measure the

resistance between solenoid valve's

and

Resistance

17.5

Failure of con-
troller

No troubleshooting can be done for failure occurs in the inner of controller.

(Except for the above reasons, the controller must be replaced in case of

this failure.)

CN-150F

702#

ZX225-1105014

Controller

Front pump SV
signal output port

GND

Operator station

Chassis harness

Front pump SV

Signal

GND

Fig. 7-28

SANY Crawler Hydraulic Excavator SY365H-9, SY365BH-9. Shop Manual (2014) - page 24