Buderus Logamatic 4122 - Troubleshooting Guide; Reportable System Faults

Troubleshooting
11
Logamatic 4121, 4122 and 4126 - Subject to technical modifications.
78
11 Troubleshooting
Have your heating contractor remedy any faults
immediately.
All system faults are displayed on the MEC2
programming unit.
Report the fault by telephone to your heating contractor.
Where necessary, set the module switches according to
the instructions in (Æ
Chapter 12).
Provided your control unit is equipped with the above
modules, the following faults may be reported:
– DHW
Inert anode
– DHW
Ext. fault input
– Heating circuit x
In manual mode
– DHW
In manual mode
– DHW
Primary pump in manual mode
– DHW
Secondary pump in manual
mode
– DHW
HE sensor
– DHW
Sensor OFF
– DHW
Sensor ON
– Boiler (x)
No connection
– Low loss header
Flow sensor
– Boiler x
Three-way valve
– Solar
Cylinder X in manual mode
– Boiler
Outside temperature sensor
– Heating circuit x
Flow sensor
– DHW
DHW sensor
– DHW
stays cold
– DHW
Therm. disinfect
– DHW
EMS
– DHW
DHW warning
– Heating circuit x
Remote control
– Heating circuit x
Communication
– Heating circuit x
Heating circuit X in manual
mode
– Boiler x
Status y burner
– Heating circuit x
Fault mess. pump
– BUS system
ECO BUS has no reception
– BUS system
No master
– BUS system
Address conflict
– Address
Conflict slot 1
– Address
Conflict slot 2
– Address
Conflict slot A
– Address
Incorrect module slot 1
– Address
Incorrect module slot 2
– Address
Incorrect module slot A
– Address
Unknown module slot 1
– Address
Unknown module slot 2
– Address
Unknown module slot A