| Terrain compensation unavailable |
IMU not connected |
Verify IMU harness connections and power supply |
| Terrain compensation unavailable |
Incorrect IMU type configured |
Verify the correct IMU type is configured within Level COMMAND |
| Terrain compensation unavailable |
IMU communication failure |
Verify IMU CANBUS/serial communication and harness condition |
| Terrain compensation unavailable |
IMU not detected during startup |
Power cycle the system and verify IMU startup status |
| Cross-slope inaccurate |
Incorrect IMU orientation |
Verify IMU orientation and mounting direction |
| Cross-slope inaccurate |
IMU mounted on angled surface |
Mount IMU to a level reference surface aligned with the machine |
| Cross-slope inaccurate |
Incorrect machine offsets configured |
Verify receiver and IMU offset configuration |
| Cross-slope inaccurate |
Incorrect implement profile selected |
Verify the correct implement profile is configured |
| Terrain compensation unstable |
IMU mounted on flexible surface |
Mount IMU to a rigid surface isolated from excessive vibration |
| Terrain compensation unstable |
Loose IMU mounting hardware |
Verify IMU mounting hardware is secure |
| Terrain compensation unstable |
Excessive vibration |
Inspect machine and mounting location for excessive vibration |
| Terrain response erratic |
IMU calibration not completed |
Perform IMU/TCM calibration according to manufacturer instructions |
| Terrain response erratic |
Calibration performed on uneven ground |
Perform calibration on stable level ground |
| Terrain response erratic |
Machine moved during calibration |
Repeat calibration while machine remains stationary |
| Terrain response delayed |
Low IMU update rate or communication issue |
Verify IMU communication quality and update rate |
| Terrain compensation drifts over time |
IMU bias drift |
Recalibrate the IMU/TCM |
| Terrain compensation drifts over time |
Temperature stabilisation incomplete |
Allow the IMU sufficient warm-up time before calibration |
| Terrain compensation differs between passes |
IMU mounting shifted |
Inspect IMU mounting and alignment |
| Terrain compensation differs between passes |
GNSS correction quality unstable |
Verify RTK/DGNSS correction status |
| Automatic Control performance inconsistent on slopes |
Cross-slope compensation disabled |
Verify terrain compensation is enabled within Level COMMAND |
| Automatic Control performance inconsistent on slopes |
Incorrect terrain compensation source selected |
Verify the intended IMU/TCM source is configured |
| TCM calibration cannot be completed |
Poor satellite visibility |
Move machine to open sky area clear of obstructions |
| TCM calibration cannot be completed |
Incorrect GNSS receiver configuration |
Verify GNSS receiver operation and correction quality |
| TCM calibration cannot be completed |
Excessive machine vibration during calibration |
Perform calibration with machine stationary and hydraulics stable |
| IMU intermittently disconnects |
Loose connector or damaged harness |
Inspect IMU harnessing and connectors |
| IMU intermittently disconnects |
CANBUS communication instability |
Verify CANBUS network integrity and termination |
