Operation in the event of a fault
12
Logamatic 4121, 4122 and 4126 - Subject to technical modifications.
81
12 Operation in the event of a fault
12.1 Emergency mode
If the electronics fail, the control unit can operate in
emergency mode. In emergency mode, all pumps
continue to run 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 switch) 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 is
installed: Before operating your heating
system manually, check the temperature
settings of the temperature limiter on the
boiler. If the temperature is set incorrectly,
the underfloor heating system could
overheat.
Switches are provided for manual mode on the control
unit and the modules.
In position 3 the relevant pump is started. The mixers
remain volt-free and can be manually adjusted.
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