SANY LATIN AMERICA
7-57
SY195/205/215/225C9 Crawler Hydraulic Excavator
Troubleshooting
Shop Manual - June 2013
User Code
Service Code
Trouble
Current through the proportional solenoid coil for
swing priority is abnormal.
52
E452
Failure description
Abnormality occurs in loaded circuit of proportional solenoid coil. Current above
0.1A lasts for 1 second. Differential current occurs in drive protection loop.
Response from controller
Operation of solenoid coil is stopped when failure is detected. Power supply
must be restored.
Symptom of machine
—
Possible causes and standard value in normal state
Cause
Standard value in normal state/Remarks on troubleshooting
1
Open circuit of
wire harness
●
Turn engine start switch to OFF position. Keep it at OFF position to per-
form troubleshooting.
Between CN-133F
①
and pin 98 of controller
Resistance
≤
1
Ω
Between CN-133F
②
and ground
≤
1
Ω
2
Short circuit of
wire harness
(grounded)
●
Turn engine start switch to OFF position. Keep it at OFF position to per-
form troubleshooting.
Between CN-133F
①
and wire 0#
Resistance
≥
1M
Ω
3
Failure of pro-
portional valve
coil
●
Turn engine start switch to OFF position. Keep it at OFF position to per-
form troubleshooting.
Unplug the connector CN-133F, and measure the
resistance between solenoid valve's
①
and
②
Resistance
17.5
Ω
4
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.)
5
98
55
1
2
CN-133F
608#
0#
ZX215-1005090
SWING PRIORITY
SOLENOID VALVE
SIGNAL OUTPUT PORT
SOLENOID VALVE
(SWING PRIORITY)
GND WIRE
CONTROLLER
SIGNAL
CAB
CHASSIS HARNESS
GND WIRE
E452 (abnormality (B) in swing priority proportional solenoid coil current)
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