SANY LATIN AMERICA
7-38
SY195/205/215/225C9 Crawler Hydraulic Excavator
Troubleshooting
Shop Manual - June 2013
User Code
Service Code
Trouble
Front pump output pressure is abnormal. Only output
alarm is enabled. .
20
E320
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
—
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. Keep it at OFF position to per-
form troubleshooting.
Between CN-115M 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 per-
form troubleshooting.
Between CN-115M C and pin 72 of controller
Resistance
≤
1
Ω
Between CN-115M 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 per-
form troubleshooting.
Between CN-115M C and ground
Resistance
≥
2M
Ω
4
Failure of sen-
sor
●
Turn engine start switch to OFF position. Then, keep it at ON position to
perform troubleshooting.
Between CN-115M C and ground
Voltage
0.5±0.2V
5
5V
72
54
56
C
B
A
CN-446M
501#
00#
50#
ZX215-1005074
FRONT PUMP
PRESS. SENSOR
FRONT PUMP PRESSUSRE
SIGNAL COLLECTING PORT
SIGNAL
GND WIRE
CONTROLLER
CAB
CHASSIS HARNESS
5V
PWR SUPPLY
GND WIRE
E320 (abnormality in front pump output pressure)
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