Error code
What has happened
Possible cause
Where to find the cause
52
The temperature sensor is not
connected
The temperature sensor is broken
The wire of the temperature sensor
is disconnected
Room temperature for instal-
lation or storage is too low
Room temperature too low
53
The temperature is too high
The boiler temperature is
Inexplicably increased
The Triac on power board is
broken.
The CPU board is broken (it does
not control the power board)
54
Boiler temperature error
Boiler temperature out of control
(e.g. the boiler is on and the tem-
perature does not increase)
The boiler safety thermostat is
activated
The boiler heating unit is broken
The Triac on the power board is
broken
The temperature sensor does
not work properly
The CPU board is broken (it does
not command the power board)
The temperature sensor is
disconnected from the boiler
Da 61
a 68
EEprom error
The CPU board is broken or badly
connected
Da 71
a 78
EEprom error
The CPU board is broken or badly
connected
32
Manual code 10083445 / Rel. 0.00 / April 2010
Maintenance manual for technical assistance LB 2300-2301-2302-2311-2312