Unit installation

43
Fault code System characteris-
tics
Cause Measures
2C Burner control unit
fault
Fault during test of
safety inputs
Replace burner control
unit.
2d Burner control unit
fault
Internal fault, low
voltage recog-
nised
Replace burner control
unit.
2E Burner control unit
fault
Internal fault, volt-
age failure recog-
nised
Replace burner control
unit.
2F Burner control unit
fault
Internal heat
demand fault
Replace burner control
unit.
2H Burner control unit
fault
Lead break, strap-
ping plug
fJ
,
safety chain
Check strapping plug
fJ
.
31 Burner control unit
fault
Error in feedback
from gas safety
valves, output
relay does not
respond
Replace burner control
unit.
32 Burner control unit
fault
Error in feedback
from choke valve,
output relay does
not respond
Replace burner control
unit.
35 Burner control unit
fault
Error in feedback
from ignition, out-
put relay does not
respond
Replace burner control
unit.
36 Fan speed during
start-up or during
operation is outside
the set range for lon-
ger than 5 s; the
speed for ignition set-
ting or start-up output
in operation is not
reached
The fan is faulty;
cable "100a" is
faulty or broken
Check the cable and
replace cable "100a" or
the fan if required.
Troubleshooting
Diagnosis
(cont.)
5692 907 GB