Operating instructions

Fault
code in
the dis-
play
Const. Weath.-
comp.
System char-
acteristics
Cause Remedy
92 X X Control mode Collector
temperature
sensor
shorted out
Check sensor
93 X X Control mode Solar: Sen-
sor S3
shorted out
Check sensor
94 X X Control mode Solar: Cylin-
der primary
temperature
sensor
shorted out
Check sensor
9A X X Control mode Collector
temperature
sensor lead
broken
Check sensor
9b X X Control mode Solar: Sen-
sor S3 lead
broken
Check sensor
9C X X Control mode Solar: Cylin-
der primary
temperature
sensor lead
broken
Check sensor
9F X X Control mode Solar control
unit fault
message
See solar control
unit service in-
structions
A7 X Control opera-
tion as per the
delivered con-
dition
Faulty pro-
gramming
unit
Replace program-
ming unit
b0 X X Burner
blocked
Flue gas
temperature
sensor short
circuit
Check flue gas
temperature sen-
sor
b1 X X Control opera-
tion as per the
delivered con-
dition
Communica-
tion error
program-
ming unit
Check connec-
tions and replace
the programming
unit if required
Fault codes (cont.)
73
Troubleshooting
5692 619 GB