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Green Heating Technology
46
Signal
Probable causes
Suggested solutions
E03
The overheat ther-
mal fuse of the
combustion assem
-
bly has triggered
(combustion assem
-
bly overheating)
Solve the problem that caused the overheating, then replace the
combustion assembly.
Note for the TECHNICIAN: the condensing combustion assembly has overheated
and the relevant thermal fuse has blown. This is an extreme protection that
normally is anticipated by other safety thermostats. If, in case of fault, those
devices should not trigger and the burner should get hotter and hotter, the
thermal fuse will cause the block of the boiler to avoid damages to building and
furniture, but the combustion group must be considered damaged and there
-
fore it must be replaced
.
The flue overheat
thermal fuse has
triggered (flue on
boiler outlet too
hot)
Solve the problem that caused the overheating of the flue, then
replace the flue thermal fuse.
Note for the TECHNICIAN:
the
flue thermal fuse preserves the flue ducts (that are
made with Polypropylene, a material suitable to the condensate acidity) from
the high temperatures, that could lead to their fusion or deformation. The trig
-
gering of this device consists in its blowing and therefore it must be replaced.
E05
Failure to the sys-
tem flow tempera
-
ture probe.
Check the cabling of the system flow temperature probe.
Replacement of the system flow temperature probe.
E09
Periodical Service
maintenance
Call Service Technician for planned maintenance operations.
Pushing
, User can cancel this for 3 times. After that the signal remain on display.
Even with this signal present, boiler is still working properly.
E10
Low system pres-
sure and SW6
wrong setting.
Disconnect the electrical supply to the boiler. On the main board,
check that the microswitch SW6 (that enables the automatic sys
-
tem filling) is switched to ON as described in the paragraph "Elec
-
tronic settings" on page 42. During re-activation, it's possible that
an automatic filling cycle is performed (see "E18").
E15
Failure to the heat-
ing system return
temperature probe.
Check the cabling of the system return temperature probe.
Replacement of the system return temperature probe.
E16
Fan failure.
The burner fan is
stopped or rotates
at an incorrect
speed.
User:
Try a boiler reset by using the
button. If the lockout
persists or reappears, call the Service Centre.
Check the burner fan functionality, especially its speed, by using the
parameter
18
(see "PCB parameters settings (technician menu)" on
page 36). Replace it if necessary.
E18
Automatic filling in
progress
The CH system water pressure was insufficient for the normal func
-
tioning so the boiler started the automatic water filling in the CH
system. Once the right pressure is achieved, the error code auto-
matically disappears and the boiler restart the normal function.
Содержание 18 K
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