SANY LATIN AMERICA
7-47
SY195/205/215/225C9 Crawler Hydraulic Excavator
Troubleshooting
Shop Manual - June 2013
User Code
Service Code
Trouble
Reading of left travel pilot pressure is abnormal.
Only output alarm is enabled. .
29
E329
Failure description
A pressure feedback voltage other than 0.25 – 4.75V keeps more than
200msec when the power is on.
Response from controller Only output alarm is enabled.
Symptom of machine
Left travel speed is low. Travel deviates.
Possible causes and standard value in normal state
Cause
Standard value in normal state/Remarks on troubleshooting
1
Failure of 5V
power supply
●
Turn engine start switch to OFF position. Then, keep it at ON position to
perform troubleshooting.
Between CN-120M A and B
Voltage
About 5V
2
Open circuit of
signal wire
●
Turn engine start switch to OFF position. Keep it at OFF position to perform
troubleshooting.
Between CN-120M C and pin 49 of controller
Resistance
≤
1
Ω
Between CN-120M B and ground
≤
1
Ω
3
Short circuit
of signal wire
(grounded)
●
Turn engine start switch to OFF position. Keep it at OFF position to perform
troubleshooting.
Between CN-120M C and ground
Resistance
≥
2M
Ω
4
Failure of sen-
sor
●
Turn engine start switch to OFF position. Then, keep it at OFF position to
perform troubleshooting.
Between CN-120M C and ground
Voltage
0.5±0.2V
5
49
54
56
C
B
A
CN-120M
200#
00#
50#
ZX215-1005083
5 V
SIGNAL
CONTROLLER
GND WIRE
5V
PWR SUPPLY
GND WIRE
CAB
CHASSIS HARNESS
L. TRAVEL PILOT
PRESS. SENSOR
L. TRAVEL PILOT PRESSURE
SIGNAL COLLECTING PORT
E329 (abnormality in left travel pilot pressure)
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