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Operation in the event of a fault
12
Logamatic 4321/4322 - Subject to technical modifications.
76
12 Operation in the event of a fault
12.1 Emergency mode
If the electronics fail, the control device can operate in
emergency mode. In emergency mode, all pumps are
left running and the mixers are volt-free. Mixers can be
manually set. In such cases, notify your local heating
contractor.
WARNING!
RISK TO LIFE
from electric shock.
z Never open the control unit.
z In an emergency switch off the control
unit (e.g. with the heating system
emergency stop) or isolate the heating
system from the mains supply by
removing the main fuse.
z Arrange for your local heating
contractor to rectify any heating system
faults immediately.
CAUTION!
SYSTEM DAMAGE
If an underfloor heating system has been
installed: Before you operate your heating
system manually, check the temperature
settings of the temperature limiter on the
boiler. If the temperature is set incorrectly
the underfloor heating could overheat.
Switches are provided for manual mode on the
programming unit and on the modules.
Each pump is activated in position
3
. The mixers stay
volt-free and can be manually adjusted.
76


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