Otis · DSD 412 DC Elevator Drive
Fault 117 occurs if serial communication does not start within 20 seconds after drive reset or power up. Fault 118 occurs if a valid serial communication message is not received for more than 150 milliseconds.
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Ensure that the host is connected and sending valid messages.
Look for and correct electrical grounding noise interference problems.
If serial communication is not being used, verify that parameter #110 is NOT set to selection 3.