SANY SY135C8 - Page 385

Troubleshooting
Safety, Operation and Maintenance Manual - Aug 20126-26
SY115C9/135C/155H Crawler Hydraulic Excavator
Failure Causes Remedy
Arm slow and weak
●
Sensor failure
●
Short circuit of harness (grounding failure)
●
Open circuit of harness
●
Controller failure
●
Replace
●
Check/repair
●
Check/repair
●
Replace
Bucket slow and weak
●
Sensor failure
●
Short circuit of harness (grounding failure)
●
Open circuit of harness
●
Bucket confl uence solenoid valve failure
●
Controller failure
●
Replace
●
Check/repair
●
Check/repair
●
Replace
●
Replace
Travel slow and weak
●
Sensor failure
●
Short circuit of harness (grounding failure)
●
Open circuit of harness
●
Controller failure
●
Replace
●
Check/repair
●
Check/repair
●
Replace
Monitor black-out
●
Fuse failure
●
Open circuit of wire
●
Short circuit of wire (grounding failure)
●
Monitor failure
●
Replace
●
Check/repair
●
Check/repair
●
Replace
Monitor displays nothing.
●
Resistor failure
●
Open circuit of wire
●
Short circuit of wire (grounding failure)
●
Monitor or controller failure
●
Replace
●
Check/repair
●
Check/repair
●
Replace
Dual-travel speed failure
●
Dual travel speed solenoid valve failure
●
Open circuit of wire
●
Short circuit of wire (grounding failure)
●
Replace
●
Check/repair
●
Check/repair
Engine coolant tempera-
ture reading incorrect
●
Coolant temperature sensor failure
●
Open circuit of wire
●
Short circuit of wire (grounding failure)
●
Wire short-circuited with 24V
●
Replace
●
Check/repair
●
Check/repair
●
Check/repair
Fuel level reading incor-
rect
●
Fuel level sensor failure
●
Open circuit of wire
●
Short circuit of wire (grounding failure)
●
Wire short-circuited with 24V
●
Replace
●
Check/repair
●
Check/repair
●
Check/repair
Wiper failure
●
Wiper motor internal failure
●
Open circuit of wire
●
Short circuit of wire (grounding failure)
●
Repair/replace
●
Check/repair
●
Check/repair
Arm-in pilot pressure
reading incorrect
●
5V power supply failure
●
Open circuit of signal line
●
Short circuit of signal line
●
Sensor failure
●
Repair/replace
●
Check/repair
●
Check/repair
●
Replace
Arm-out pilot pressure
reading incorrect
●
5V power supply failure
●
Open circuit of signal line
●
Short circuit of signal line
●
Sensor failure
●
Repair/replace
●
Check/repair
●
Check/repair
●
Replace