Buderus Logamax plus GB142-24 Servicing Instructions page 24

6 Symptoms
Display code
z z
Main Sub-
display display
code code
e e
[4/y/\| [2/2/3|
e e
[6/a/\| [2/2/7|
e e
[6/a/\| [2/2/7|
e e
[6/c/\| [2/2/8|
e e
[6/c/\| [3/0/6|
e e
[6/l/\| [2/2/9|
e e
[6/p/\| [2/6/9|
e e
[7/c/\| [2/3/1|
e e
[7/l/\| [2/6/1|
e e
[7/l/\| [2/8/0|
e e
[8/y/\| [2/3/2|
1)
[8.8.8]
e e
[9/a/\| [2/3/5|
e e
[9/h/\| [2/3/7|
e e
[9/h/\| [2/6/7|
e e
[9/h/\| [2/7/2|
e e
[9/l/\| [2/3/4|
e e
[9/l/\| [2/3/8|
e e
[9/p/\| [2/3/9|
e e
[9/u/\| [2/3/3|
table 2 Display indications on the BC10 basic controller
1)
only visible using the service tool
2)
is being carried out
24 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
e
The supply sensor contact is interrupted.
e
No ionization after ignition.
After four startup attempts, a locking
boiler fault follows [6/a/\|.
e
No ionization after four startup attempts.
e
An ionization current was measured
before the burner start.
e
An ionization current was measured after
the burner switch-off.
e
Ionization fails during the operating
phase.
e
The hot surface ignitor activates too long.
e
The power supply was interrupted and
switched on again after a fault message.
e
The UBA 3 is defective.
e
The UBA 3 is defective.
The external switch contact is activated.
Display test while starting up. This code
is displayed for a maximum of 1 second.
e
KIM or UBA 3 is defective.
e
KIM or UBA 3 is defective.
e
The UBA 3 is defective.
e
The UBA 3 is defective.
e
The gas valve coil or the wiring to the gas
valve is defective.
e
The UBA 3 is defective.
e
KIM or UBA 3 is defective.
e
KIM or UBA 3 is defective.
Type of Reset
Other
display required
symptoms
code ?
VKS yes
No heating
operation and
no hot water.
BKS no
VKS yes
No heating
operation and
no hot water.
VKS yes
No heating
operation and
no hot water.
VKS yes
No heating
operation and
no hot water.
BKS no
VKS yes
No heating
operation and
no hot water.
VKS yes
No heating
operation and
no hot water.
VKS yes
No heating
operation and
no hot water.
VKS yes
BC
ÜC
VKS yes
No heating
operation and
no hot water.
VKS yes
No heating
operation and
no hot water.
VKS yes
No heating
operation and
no hot water.
VKS yes
No heating
operation and
no hot water.
VKS yes
No heating
operation and
no hot water.
VKS yes
VKS yes
No heating
operation and
no hot water.
VKS yes
No heating
operation and
no hot water.
Diagnosis Remedy
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page 65 page 65
page 65 page 65
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page 72 page 72
page 73 page 73
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