7. Errors and error remedying
52
7.4 Replacement of electronic boards
The Control-Unit consists of the following three boards:
CU electronics board
(2),
IO electronics board
(5) and
display board
(7).
2
1
3
6
5
4
7
7.4.1 Replacing the CU electronics board
1. Disconnect voltage supply
and external circuits and open the cover at the electronics housing.
2. Remove connectors and remove the fastening screws (1).
3. Remove the CU electronics board (2).
4. Install the new board in reverse order,
but do not connect mains power supply!
The data memory is located on the CU electronics board (evaluation electronics board).
The memory contains all device and product parameter settings.
If this memory device is transferred to a new board no new settings must be performed.