Unical KON, User Operating Instructions Manual

Page: 13 / 40

7
ENGLISH
6.4 - ELIMINATING FAULTS
When the boiler detects an operation anomaly or
it is blocked due to a permanent fault, the control
panel display lights up, and the symbol (
service
)
starts to flash.
If the fault is permanent, the error code is displayed
in place of the degrees centigrade.
For the codes listed on this page,
it is not necessary to press button
“D” to display the error code.
by pressing the unblock button “ D ”
the code that identifies the cause
is displayed, flashing, in place of
the degrees centigrade,
(for the “error codes” list see par.
4.6 installation and maintenance
instruction manual).
The user can intervene to restore proper operation
only in the following cases:
System pressure too
low
How to elimi-
nate the fault:
Restore the correct pressure value
by acting on the boiler filling valve
(for optimum operation, the pres -
sure value should be within 0.8
and 1 bar).
When the minimum pressure value
is reached (0.6 bar), boiler opera -
tion is resumed.
If water pressure must be con-
tinually restored, contact an
Authorised Unical Assistance
Centre.
Burner ignition block
Burner blocking device triggered
due to:
- no gas
- air in pipe (when system is new
or after long idle period) .
How to elimi-
nate the fault:
Check that the gas valve is open
and press the unblock button to
resume the proper operation of
the boiler.
After 3 interventions of the boil-
er blocking device, do not try to
resume operation of the boiler
by yourself. Contact an Author-
ised Unical Assistance Centre.
Safety thermostat intervention
(due to air)
How to elimi-
nate the fault:
Bleed the air from the radiators and
restore system pressure.
For all the other error codes, the user is NOT
authorised to resume boiler operation by him-
self. Contact an Authorised Unical Assistance
Centre.
UNICAL AG S.p.A. disclaims any
liability for damage caused as
a result of improper installation,
use, appliance conversion or for
non-compliance with the instruc -
tions supplied by the manufac -
turer or installation regulations in
force concerning the material in
question.