Controls and MEC2 programming unit
5
Logamatic 4121, 4122 and 4126 - Subject to technical modifications.
17
5.3 Switching on the control unit
z Check that the control unit ON/OFF switch and the
switches on the fitted modules are set to "I" or "AUT".
z Switch the control unit on by setting the ON/OFF
switch to "I" (Æ
Fig. 4, [5], page 13).
After approximately 2 minutes all modules fitted to the
control unit are recognised, and the standard display is
shown.
5.4 Switching off the control unit
z Switch the control unit off by setting the ON/OFF
switch to "0" (Æ
Fig. 4, [5], page 13).
z When there is a risk: Isolate the heating system
from
the mains supply with the emergency stop
switch upstream of the boiler room, or by removing
the main fuse.
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