Engineering Observations: Motor Acoustics and Error Code Timing on Legacy Curved Units

- Audible Levelling Motor Activity Correlated with H7, J5, and J3 Error Codes – Observational Notes
- Acoustic Signatures of Stairlift Levelling Mechanisms During Common Error States
- H7 J5 J3 Error Sequence: Motor Engagement and Gear Train Behavior Documentation
- Levelling System Noise Patterns in Conjunction with Standard Stairlift Diagnostic Codes
- Engineering Observations: Motor Acoustics and Error Code Timing on Legacy Curved Units