Four transfer switch status lights (light is on when:)
• Normal source accepted (left light)
• Emergency source accepted (right light)
• Load on normal [transfer switch in normal position]
• Load on emergency [transfer switch in emergency position]


Alert light (light is on when:) Read the display for more information.
• Any alarm condition turns on this light.


Not in automatic light (light is on when:)
• Not in automatic mode (manual); blinking indicates transfer inhibit.
For 3NTS and 3NDTS this light is always on, indicating that it is a manual transfer switch.
If Feature 6DL is active, the light is on when the load is transferred to emergency.

Published for:ASCO Power Technologies USA