Buderus Logamax plus GB142-24 Servicing Instructions page 47

The supply sensor has measured a
0 Y 2 7 6
temperature higher than 203 °F (95 °C).
The safety sensor has measured a
0 Y 2 7 7
temperature higher than 203 °F (95 °C).
The return sensor has measured a
0 Y 2 8 5
temperature higher than 203 °F (95 °C).
Wait approx. 60 seconds until the boiler
automatically becomes operational again.
Are all servicing cocks
system pressure (measured on the boiler)
in the heating system at least
one thermostatic valve open?
Check the supply, safety and return sensors
Are the supply and safety
Is the primary circulation
Logamax plus GB142-24/30/45/60 - We reserve the right to make any changes due to technical modifications!
fault message ?
0 Y
Yes
open?
Yes
Is the
14.5 psi (1 bar)?
Yes
Is at least
Yes
(page 89).
sensors okay?
Yes
Check the primary
circulation pump.
pump okay?
Yes
44
page 83
L
o
c
k
i
Locking boiler-fault code.
n
g
b
o
il
e
r
-
Locking boiler-fault code.
f
a
u
lt
c
o
d
e
Locking boiler-fault code.
1
L
(
fl
a
s
h
i
n
g
)
B
l
o
c
k
i
n
g
b
o
il
e
r
-
f
a
u
lt
c
o
No
No
Open the servicing cocks.
No
Fill and bleed the heating system.
No
Open a thermostatic valve.
No
Replace the supply, safety and/or return
sensors (page 91).
No
Replace the primary
circulation pump.
Diagnosis 7
8
page 31
47