ASCOM Ascotel 2025 System Manual page 1066

Test Procedure for the Additional Keypad (ZTF)
1. Unplug the terminal connecting line, then plug the connector back in again
while keeping the topmost key pressed down.
The ZTF LEDs go on and off.
2. Press any key on the ZTF.
Only the LED of the pressed key lights up.
3. Press one key after the other.
Only the LED of the key pressed in each case lights up.
4. To exit the self-test mode, unplug then reconnect the terminal connecting
line.
Should any irregularities occur during the self-test, contact a specialist.
HBT_20321104_07/B0_en
ascom Ascotel 2025/2045/2065
Operations Supervision 7.67