Fault/Error Cause
Solution
7-
TTB
Error:
LED
L7
is
blinking -Insufficient chimney draught. - Check the chimney.
fast
and
L4
is
ON.
-
TTB
sensor
is
out
of
operating -
The
system
stays in blocking
range
and
this
condition lasted
condition until
CH
sensor
is
in
for more than 1 0 seconds. operating range. Wait
15
minutes.
TTB
error time
is
15 minutes.
If
repeated, consult qualified
service.
8-
Low
water pressure:
L4
is
- Operating water pressure
is
-
The
system
stays in blocking
ON
and
LED
L6
-
L7
are not suitable for your condition until water pressure
is
blinking
fast.
appliance.
back
to nominal value.
- Check the valves whether
is
open or not.
- Check circuits for leaks.
9-
No
communication: - Main board
can
not - Consult qualified service
All
LEOs
are blinking
fast.
communicate with display
panel.
1
0-
Other microcontroller
-
- Consult qualified service.
(main board)
errors:
L3,
L6
and
L7
are
ON
and
L4
is
blinking
fast.
- MAINTENANCE
-The boiler should
be
checked
and
serviced for general
maintenance
once
a year.
Maintenance
and
service operations must
be
carried
out
only
by
qualified
person.
-
Only
a
damp
cloth
should
be
used for
cleaning
the
outer
space
of
the
boiler
and
then
the
surfaces should
be
dried
completely.
Do
not
use
chemical
subtances
or
solutions
which
cause
rust in
your
appliance.
- STANDARDS
AND
REGULATIONS
During
the
installation
and
operation
of
the
boiler,
the
instructions
and
precautions
detailed
in this
manual
and
also all relevant standards
and
local
regulations must
be
obeyed.
- APPENDIX
ITJ
Pump's characteristic curve (height & flow)
H
(m)
5~~._~~--~~-4--~-+--~~~~4--4--+--+~
0.0 0.2
0.4 0.6
0.8
1.0
1
.2
1.4
1
.6
1
.8
2.0
2.2
2.4 2.6
fig.29
37
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