Buderus Logamax plus GB142-24 Servicing Instructions page 23

Display code
z z
Main Sub-
display display
code code
e e
[1/c/\| [2/1/0|
e e
[1/l/\| [2/1/1|
e e
[2/e/\| [2/0/7|
e e
[2/f/\| [2/6/0|
1)
e e
[2/f/\| [2/7/1|
e e
[2/l/\| [2/6/6|
e e
[2/p/\| [2/1/2|
1)
e e
[2/u/\| [2/1/3|
1)
e e
[3/a/\| [2/6/4|
e e
[3/f/\| [2/7/3|
e e
[3/l/\| [2/1/4|
e e
[3/p/\| [2/1/6|
e e
[3/y/\| [2/1/5|
e e
[4/a/\| [2/1/8|
e e
[4/c/\| [2/2/4|
e e
[4/e/\| [2/7/8|
e e
[4/l/\| [2/2/0|
e e
[4/p/\| [2/2/1|
e e
[4/u/\| [2/2/2|
table 2 Display indications on the BC10 basic controller
1)
only visible using the service tool
2)
is being carried out
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
Flue gas sensor is activated
(not available).
e
The UBA 3 does not register any
connections to the unused contacts 78
and 50.
e
The system pressure is too low.
No temperature increase after burner
start or the temperature difference
between the supply and safety sensors is
more than 27 °F (15 K).
e
The temperature difference between the
supply and safety sensors is more than
27 °F (15 K).
e
The primary circulation pump does not
generate a pressure difference.
Temperature increase of supply sensor
or safety sensor is more than 9 °F/sec
(5 K/sec).
The temperature difference between the
supply and return sensors is more than
90 °F (50 K).
e
The air flow by the blower has failed
during the operating phase.
e
The blower is switched off during the
safety test.
e
The blower is switched off during the
safety test.
e
The blower is running too slowly.
e
The blower is running too fast.
e
The supply sensor has measured a
temperature higher than 221 °F (105 °C).
e
The UBA 3 does not register the short cut
bestween the unused contacts 22 and
24.
e
The sensor test has failed.
e
The safety sensor is shorted or
measures temperatures higher than 266
°F (130 °C).
e
The safety sensor contact
is interrupted.
e
The supply sensor is shorted.
Type of Reset
Other
display required
symptoms
code ?
BKS no
Flue gas sensor
has measured a
flue gas tempe-
rature higher than
221 °F (105 °C)
BKS no
No heating
operation and no
hot water.
BKS no
No heating
operation and no
hot water.
BC
BKS no
VKS yes
No heating
operation and
no hot water.
BC
BC
BKS no
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
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
No heating
operation and no
hot water.
Symptoms 6
Diagnosis Remedy
page 48 page 48
page 48 page 48
page 49 page 49
page 49 page 49
page 50 page 50
page 52 page 52
page 53 page 53
page 54 page 54
page 55 page 55
page 56 page 56
page 57 page 57
page 58 page 58
page 59 page 59
page 60 page 60
page 60 page 60
page 61 page 61
page 62 page 62
page 63 page 63
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