Buderus Logamatic 4323 - Page 106

Fault
20
Logamatic 4323 - Subject to technical modifications.
106
Remote
control x
– Because no actual room
temperature is available, the
effects of the following features
are disabled: Room influence,
start and stop optimisation,
automatic adaptation.
– Remote control incorrectly
connected or faulty.
– Check remote control function
or connection.
Replace remote control or module.
– Incorrect address allocated to
remote control.
– Check remote control address
(see BFU remote control
documentation).
– Remote control cable damaged by
a drill or is broken.
– Check connecting cables.
Communi-
cation HKx
– Because no actual room
temperature is available, the
effects of the following features
are disabled: Room influence,
start and stop optimisation,
automatic adaptation.
– Remote control incorrectly
connected or faulty.
– Check remote control function or
connection.
– By mistake, neither a BFU remote
control nor a MEC2 was selected
for this heating circuit in the MEC2.
– Select the correct remote control in
the MEC2 under "Remote control"
(Æ Chapter 11.7).
– Incorrect address allocated to
remote control.
– Check remote control address (see
BFU remote control
documentation).
– Remote control or matching
module is faulty.
– Replace remote control or module.
ECOCAN-BUS
reception
– No effect on the control
characteristics.
– Rotary encoder on CM431 (behind
MEC2 or boiler display) incorrectly
addressed.
– Check setting of rotary encoder
(Æ Chapter 5.1).
– Gravity switch on NM482 is
incorrectly positioned.
– Check gravity switch
(Æ Chapter 5.2).
No master
– The system operates with
minimum outside temperature.
– By mistake, there is no master
control unit (address 1) in the
network.
– Check addresses of all control
units in the network.
On the master control unit, CM431
must be set to address 1
(Æ Chapter 5.1).
– Connecting cable to master control
unit is interrupted.
– Check function of connecting
cable.
– Master control unit (address 1) is
switched off or faulty.
– Check master control unit and
replace if necessary.
Conflicting Bus
addresses
– Bus communication no longer
possible.
– All control functions requiring data
exchange via the ECOCAN-BUS
can no longer be implemented.
– Multiple identical addresses are
present.
Each address must only be
assigned once in the ECOCAN-
BUS network.
– Check the addresses of all Bus
subscribers (address settings
Æ Chapter 5.1).
Address
conflict x
– Functions of the module with
address conflict can no longer be
implemented. All other modules in
the control unit as well as the
ECOCAN-BUS continue to
function normally.
– Module must not be installed into
this control unit (e.g. 2 x FM441 in
one control unit or FM447 in
Logamatic 4323).
– Check using Chapter 5, Tab. 1,
whether the module may be used
for this type of control unit.
Incorrect
Module x
– Module switches all outputs off
and corresponding fault LED on.
– A different module was installed in
one slot of the control unit (e.g.
FM442 was replaced with FM441).
– Insert new module into MEC2
(Æ Chapter 10).
– By mistake, an incorrect module
was selected for this MEC2 slot.
– Check module selected in MEC2
(Æ Chapter 10).
– MEC2 programming unit,
corresponding module or control
unit is faulty.
– If necessary, replace relevant
component.
Fault Effect on control
characteristics
Possible causes of the fault Remedy
Tab. 4 Fault table