Deif GPC 300 Operator's Manual page 29

Mode Procedure
When the controller is in Switchboard control, the display push-buttons are not available. The mains breaker
Switchboard control
can only be opened from the switchboard.
NOTE
* If there is a position failure for the mains breaker, you can still attempt to try and open the breaker and push
OPERATOR'S MANUAL 4189341171C UK
a. The controller then opens the mains breaker. The breaker LED is OFF when the breaker is open.
b. The breaker LED is OFF when the breaker is open.
.
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