Sterling SDF 250 - Manual (Page 51)

SDF 250/400/500
Maintenance 5-14
5.5.1. Resetting the control values
This electrical work is intended to be carried out only by trained
personnel.
After changing the battery or the PLC the control values should be resetted.
All control values are set back to the standard settings.
Open the control box with the switch box key which is part of the supply.
Turn the key to the STOP position.
Turn the key to the MRES position.
Hold the key in this position until the STOP-LED comes on for the second time and remains on
(this takes 3 seconds).
Turn the key to the STOP position.
Within 3 seconds you must turn the switch back to the MRES position.
Hold the key until the STOP-LED flashes.
&
When the CPU has completed the reset, the STOP-LED stops
flashing and remains lit.
Close the control box.