57
TECHNICAL ASSISTANCE SERVICE
Error
code
via QAA
Diagnostic
info
Description of error
Type of fault
System action
Procedure
128
99
No flame during fun-
ctioning
Flame failure during fun-
ctioning
Safety shutdown
Check the gas supply
and gas valve status;
check the burner
128
100
No flame during fun-
ctioning
Flame failure during fun-
ctioning
Burner lockout
(permanent).
Lockout reset re-
quired
Check the gas supply
and gas valve status;
check the burner
128
570
No flame during fun-
ctioning
Ionisation current is be-
low the threshold set in
the IonLimitGrenz para-
meter; count for number
of missing flame readings
started
Safety shutdown
Check the gas supply
and gas valve status;
check the burner
128
571
No flame during fun-
ctioning
Ionisation current is be-
low the threshold set in
the IonLimitGrenz para-
meter; maximum number
of missing flame readings
reached
Burner lockout
(permanent).
Lockout reset re-
quired
Check the gas supply
and gas valve status;
check the burner
129
78
Comburent air system
error
Air pressure switch trip-
ped
Safety shutdown
Check the air pressure
switch; check the air in-
take pipe; check the fan
129
79
Comburent air system
error
The air pressure switch
has been closed incor-
rectly (toggles repeatedly
between open and closed
position) or fan speed is
too high
Safety shutdown
Check the air pressure
switch; check the air in-
take pipe; check the fan
129
80
Comburent air system
error
The air pressure switch
has been closed incor-
rectly (toggles repeatedly
between open and closed
position) or fan speed is
too low
Safety shutdown
Check the air pressure
switch; check the air in-
take pipe; check the fan
129
84
Comburent air system
error
Maximum fan speed
exceeded
Safety shutdown
Check the air pressure
switch; check the air in-
take pipe; check the fan
129
85
Comburent air system
error
Fan speed below mini-
mum
Safety shutdown
Check the air pressure
switch; check the air in-
take pipe; check the fan
129
86
Comburent air system
error
Fan speed below mini-
mum
Safety shutdown
Check the air pressure
switch; check the air in-
take pipe; check the fan
129
87
Comburent air system
error
Fan speed below mini-
mum
Burner lockout
(permanent).
Lockout reset re-
quired
Check the air pressure
switch; check the air in-
take pipe; check the fan
129
89
Comburent air system
error
Fan speed below mini-
mum
Safety shutdown
Check the air pressure
switch; check the air in-
take pipe; check the fan
129
90
Comburent air system
error
Fan speed has fallen be-
low pre-purge speed
Burner lockout
(permanent).
Lockout reset re-
quired
Check the air pressure
switch; check the air in-
take pipe; check the fan