Buderus Logamax plus GB142-24 Servicing Instructions page 22

6 Symptoms
Display code
z z
Main Sub-
display display
code code
e e
[0/a/\| [2/0/2|
1)
e e
[0/c/\| [2/8/3|
1)
e e
[0/e/\| [2/6/5|
1)
e e
[0/h/\| [2/0/3|
1)
e e
[0/l/\| [2/8/4|
1)
e e
[0/u/\| [2/7/0|
1)
e e
[0/y/\| [2/0/4|
1)
e e
[0/y/\| [2/7/6|
e e
[0/y/\| [2/7/7|
e e
[0/y/\| [2/8/5|
table 2 Display indications on the BC10 basic controller
1)
only visible using the service tool
2)
is being carried out
22 Logamax plus GB142-24/30/45/60 - We reserve the right to make any changes due to technical modifications!
Symptoms
z
Key to display code
Operating phase:
The switch optimization program is
activated.
This program is activated if there is more
than one burner firing requests from an
RC or ON/OFF regulator within 10
minutes.
This means that the boiler cannot be
restarted until at least ten minutes have
elapsed since initial startup of the burner.
The burner is started.
Readiness for operation:
The boiler is in ready mode.
The time-proportional program is
activated.
The time-proportional program is
activated as soon the load requested by
the modulating room controller is lower
than the lower limit of the boiler load.
During the time-proportional program the
burner is switched on and off repeatedly.
The period in which the burner is
switched on depends on the difference
between the load required by the
modulating room controller and the lower
limit of the boiler load. As soon as the
burner is switched on, the device is
operating at minimum load. As soon as
the burner is switched off, the display
e
code [0/e/\| [2/6/5|
is indicated in the
display of the BC10.
The time-proportional program is
deactivated automatically as soon as the
load required by the modulating room
controller is higher than the lower limit of
the boiler load.
The boiler is in ready mode, there is no
heat request.
The gas valve is opened.
Power Up.
Boiler is starting up after a reset or after
the main power is switched on.
This display code will be displayed for 4
minutes maximum.
The boiler switches off, the temperature
is higher than the target temperature.
e
The supply sensor has measured
a temperature higher than 203 °F
(95 °C).
e
The safety sensor has measured
a temperature higher than
203 °F (95 °C).
e
The return sensor has measured
a temperature higher than
203 °F (95 °C).
Type of Reset
Other
display required
symptoms
code ?
BC Possibly no
heating operation.
BC
BC
BC
BC
BC
BC
BKS no
BKS no
BKS no
Diagnosis Remedy