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We reserve the right to make any changes due to technical modifications!
Installation and Servicing Instructions Logamax plus GB142-24/30/45/60 • Version 12/2004
Buderus Hydronic Systems • http://www.buderus.net
Appendix16
16.2 Error messages
z Press the "Service" button to display the service
code (e. g. "$").
z Press the "Service"
button to display the error
code (e. g. "").
The error message is a combination of the service code
(e. g. "$") and the error code (e. g. ""). You can only
resolve the error message using the Service chapter in
this manual.
INSTRUCTION FOR INSTALLERS
The display may also show system faults
(e. g. "$"). In principle, they are identified by
the initial letter "A" and they refer to faults
between the appliance and the additionally
available electronic components.
Display Meaning
Flame monitoring
$  No ionization message after ignition.
& 

Ionization measured before burner start.
/The flame went out during the heating phase.
3Hot-surface ignitor on for too long.
Grid voltage
&The grid power was interrupted after an error.
/

UBA fault.
External switching contact
< External switching contact, e. g. temperature
safety switch for floor heating, has taken place.
System faults
$Communication fault between UBA and KIM.
+


UBA fault.
3UBA fault.
/


Faulty gas burner fitting cable connection.
8KIM out of order.
< Communication fault between BC10 basic
controller and UBA.
( System faults
$&
)+/
<
Internal UBA fault.
Display Meaning
Water flow / water pressure
(System pressure too low < 3 psi (20 mbar).
)Temperature difference between safety and
supply sensors too much or no temperature
increase after starting the burner.
/Test of pump operation via a pressure increase
in the heating system (during pump start).
3 Temperature increase of safety sensor or supply
sensor too high.
8 Temperature difference between supply and
return sensor too much.
< Pump feedback fault.
Fan speed
$Fan unit failed during operation.
)Air volume flow not lost for 24 hours.
/Fan shut down during security test.
3Fan unit is running too slowly.
<Fan unit is running too fast.
Temperatures
$Supply sensor over 220 °F (105 °C).
(Sensor test failed
/  Safety sensor affected by short circuit or higher
than 266 °F (130 °C).
3  Loose contact or defective safety sensor.
8  Supply sensor affected by short circuit.
<  Loose contact or faulty supply sensor.
88


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