Error Messages - Buderus logamax plus gb142-24 Installation Manual

15.2 Error messages

e
Press the "Service"
(e. g. "3A").
e
Press the "Service"
(e. g. "207").
The error message is a combination of the service code
(e. g. "3A") and the error code (e. g. "207"). 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.
"A11"). In principle, they are identified by the
initial letter "A" and they refer to faults between
the boiler and the additionally available elec-
tronic components.
Display Meaning
Water flow / water pressure
2
E 207 System pressure too low < 3 psi (0.2 bar).
F 271 Temperature difference between safety and supply
sensors too much or no temperature increase after
starting the burner.
L 266 Test of pump operation via a pressure increase in the
heating system (during pump start).
P
Temperature increase of safety sensor or supply
sensor too high.
U
Temperature difference between supply and return
sensor too much.
Y
Pump feedback fault.
Fan speed
3
A 264 Fan unit failed during operation.
F 273 Continuous 24 hour operation.
L 214 Fan shut down during security test.
P 216 Fan unit is running too slowly.
Y 215 Fan unit is running too fast.
Temperatures
4
A 218 Supply sensor over 220 °F (105 °C).
E 278 Sensor test failed
L 220 Safety sensor affected by short circuit or higher than
266 °F (130 °C).
P 221 Loose contact or defective safety sensor.
U 222 Supply sensor affected by short circuit.
Y 223 Loose contact or faulty supply sensor.
We reserve the right to make any changes due to technical modifications!
Installation instructions Logamax plus GB142-24/30/45/60 • version 10/2007
button to display the service code
button to display the error code
Display Meaning
Flame monitoring
6
A 227 No ionization message after ignition.
C 228
Ionization measured before burner start.
306
L 306 The flame went out during the heating phase.
P 229 Hot-surface ignitor on for too long.
Grid voltage
7
C 231 The grid power was interrupted after an error.
L 261
UBA fault.
280
External switching contact
8
Y
External switching contact, e. g. temperature
safety switch for floor heating, has taken place.
System faults
9
A 235 Communication fault between UBA and KIM.
H 237
UBA fault.
267
272
P 239 UBA fault.
L 234
Faulty gas burner fitting cable connection.
238
239
U 233 KIM out of order.
Y
Communication fault between BC10 basic
controller and UBA.
System faults
E
1, A, C,
Internal UBA fault.
F, H, L,
Y
Appendix 15
Buderus • http://www.buderus.net
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