Applicable Systems
SKY-2
Symptoms
The elevator reports an encoder feedback loss. The motor encoder signal is missing or corrupted.
Possible Causes
- Encoder cable damaged or connector loose
- Encoder coupling or mounting loose
- Encoder internal electronic failure
Troubleshooting Steps
- Step 1: Check the encoder cable and connector
Cable is intact and connector is secure - Step 2: Verify encoder mounting and coupling
Encoder is firmly mounted - Step 3: Test encoder output signal
Signal is clean and consistent
How to Reset
To reset: Restore encoder feedback, then reset the drive controller.
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Source: Otis Elevator Service Manual, Otis Worldwide Corporation
Category: Elevator
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