Buderus Logamatic 4323 - Simple Troubleshooting

Troubleshooting
10
Logamatic 4323 - Subject to technical modifications.
72
10.1 Simple troubleshooting
If no fault messages are displayed on the control
unit in spite of cool rooms or cool DHW, there may
be an incorrect setting.
Observation Possible cause(s) Remedy
Control unit is unilluminated or does
not function
ON/OFF switch set to "OFF".
No power supply.
ON/OFF switch set to "ON".
Check main fuse.
Heating system emergency
stop switch set to "ON".
MEC2 unilluminated
MEC2 incorrectly plugged in (contact
problems).
Plug in MEC2 correctly.
Room cool
The actual room temperature for the relevant
heating circuit is incorrectly displayed.
Check the heating circuit
assignment.
The programming unit operates in setback
mode.
Check time and heating
program and modify if
required.
The set room temperature is too low.
Correct the set room
temperature.
The DHW supply runs too long. Check DHW heating.
Heat sources deliver insufficient heating
energy or are shut down.
Check heat source.
The room temperature sensor is incorrectly
adjusted.
Sensor adjustment.
DHW cool
The DHW is set to the wrong temperature.
Correct the DHW temperature
setting.
The switching program is incorrectly set up.
Re-program the switching
program.
DHW too cold
(if DHW is heated by external heat
source)
External heat sources supply insufficient
heating energy.
Check heat source.