Appendix; Troubleshooting - Typical Faults; Terms And Abbreviations - Danfoss PLUS+1 JS1-H User And Safety Manual

User and Safety Manual
PLUS+1® JS1-H Steer by Wire

Appendix

Troubleshooting - Typical faults

Symptom
Operator Notification suddenly becomes active
during normal machine operation.
Button not working
Imprecise steering behavior
Joystick sporadically activates Operator
Notification after starting the machine.
Joystick always activates Operator Notification
after starting the machine.
Direction Light always on
Horn always on
GPS-based Auto-Drive always off.
Light is always on high beam.

Terms and abbreviations

Abbreviation Meaning
AgPL Agriculture Performance Level (followed by a letter a to e)
B10d Specifies the number of cycles at which 10% of components have failed dangerously
CFF Common cause failure
DC Diagnostic Coverage
EHD Electro-Hydraulic Dual
EOS Embedded Operating System
FIT Fault Insertion Testing
FMEDA Failure Modes, Effects and Diagnostic Analysis
HFT Hardware Fault Tolerance
MSK Modular Safety Kernel
MTTFd Mean Time to Dangerous Failure
N/A Not applicable
NC Not Connected
OPN Operator Notification
PCBA Printed Circuit Board Assembly
PFH Probability of Failure per Hour
PL Reached Performance Level (followed by a letter a to e)
PVED-CLS Actuator for the electro-hydraulic steering system from Danfoss
SBW Steer-by-Wire
SFF Safe Failure Fraction
SIL Safety Integrity Level
24 | © Danfoss | December 2022
JS1-H Steer by Wire Operational Status
Joystick is in Safe State.
Machine is still operable but at limited
performance.
Force Feedback may be deactivated.
Hardware problem.
Not necessarily detected as dysfunctional circuit.
Joystick is in Safe State.
Machine is still operable but at limited
performance.
Force Feedback may be deactivated.
Hardware problem identified by power-on self-
test.
Hardware problem.
Hardware problem.
Hardware problem.
Hardware problem.
Cause/Solution
Turn the machine off and on again.
Joystick needs to be replaced.
Mis calibrated Sensors.
Joystick needs to be replaced.
Turn the machine off and on again.
Joystick needs to be replaced.
Joystick needs to be replaced.
Joystick needs to be replaced.
Joystick needs to be replaced.
Joystick needs to be replaced.
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