Checking and acknowledging faults
Fault code
Const.
in the dis-
play
9C
X
9F
X
A7
b0
X
b8
X
b1
X
b4
X
b5
X
b7
X
bA
Weat-
System
h.
character-
comp.
istics
X
X
Control
mode
X
Control
mode
X
Burner
blocked
X
X
Control
mode
X
Emissions
test mode
X
Control
mode
X
Burner
blocked
X
Mixer M2
continues
to move
Troubleshooting
(cont.)
Cause
Remedy
Cylinder tempera-
ture sensor lead
break
Solar control unit
See solar
error message
control unit
service
instructions
Faulty operating
Replace
interface
operating
interface
Flue gas tempera-
Check the
ture sensor short
flue gas tem-
circuit
perature sen-
sor (see
page 87)
Flue gas tempera-
ture sensor break
Communication
Check con-
fault – program-
nections and
ming unit (internal)
replace the
programming
unit, if neces-
sary
Internal error ana-
Replace con-
log converter
trol unit
Internal error
Replace con-
trol unit
Boiler coding card
Plug in the
missing, faulty or
boiler coding
incorrect card
card or
inserted
replace, if
faulty
Communication
Check the
fault - extension kit
extension kit
for mixer circuit M2
connections
and coding.
Start the
extension kit.
77