69
Yes
Burner in opera-
tion
No
Shuts down below
the set boiler water
temperature and
restarts immediate-
ly
Check the flue
system for leaks
(flue gas recircula-
tion); check the
gas flow pressure
Resetting the appliance
Hold down MODE and OK simultane-
ously until flashes (reset).
Overview of checks
Display Area
"IF" Status checks (current/set values), see page 70
"Ct" Meter checks, see page 71
"AL" Fault history (10 most recent fault messages)
For the meaning of the fault messages, see "Fault display"
from page 73
■ Use / to select the required
check.
– The selected check is shown on
the additional display.
– The value to be checked is shown
on the main display.
■ Press MODE to select the required
areas.
Diagnostics
Function sequence and possible faults
(cont.)
5837146
Service
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