ETAS ES4105.2, Руководство пользователя, Страница: 10 / 18

Operation 10
2. Disconnect all connectors from the board you
want to remove.
3. Loosen the mounting screws at the top and bot-
tom edge of the board’s front panel.
4. Grasp the handle of the board and pull the board
carefully out.
5. Insert the board into its storage package or an
anti-static bag.
6. Secure the slot with a protective cover.
3.3 Fuse Replacement
The power supply line of the built-in AC unit is protected by two 3.15 A fuses.
Both the neutral wire and the phase wire have their own fuse.
To replace the fuses for the built-in AC unit:
1. Turn off the power to the housing. Check that all
devices connected with the housing by cables
have also been powered off.
2. Disconnect the power cable of the housing from
the rubber socket.
3. Unlock the fuse holder (in the mains connector)
with a screw-driver.
4. Replace the defective fuse with a new fuse rated
3.15 A (slow), 250V.
5. Reinsert the fuse holder.
6. Reconnect the power cable.
3.4 Automatic Overcurrent Protection
The built-in AC unit of the housing is equipped with an automatic overcurrent
protection. If the AC unit detects an overcurrent condition for an output volt-
age, it shuts down all outputs. The corresponding front panel LED goes dark.
The AC unit’s overcurrent protection can be reset by briefly powering it off.
To reset the automatic overcurrent protection:
1. Turn off the power to the housing.
2. Wait approximately one minute.