SRVO-232: NTED input
The NTED - non-teacher enabling device, the second enabling switch held by an observer during teaching on cells equipped with one - was released or triggered.
What it means
The NTED - non-teacher enabling device, the second enabling switch held by an observer during teaching on cells equipped with one - was released or triggered.
Common causes
Ranked by what technicians most often find, most likely first.
- NTED released by the second person during teach operation.
- Fault in the NTED circuit if it alarms with the device properly held.
How to fix it
- Have the observer press the NTED, then press RESET.
- Persistent alarms with a properly held device mean circuit trouble - maintenance-manual diagnosis.