7
User’s operating instructions
6.5 - FAULT SOLUTION
When the boiler shows an light anomaly the symbol
(
).
starts flashing on the display, beside the boiler temperature.
When the boiler shows a permanent fault the symbol (
)
starts flashing beside the error code, which has taken the
place of the boiler temperature.
If the fault is a blocking one or if the boiler is in stand-by the
code that identifies the cause is shown instead of the
temperature (for the fault list see paragraph. 5 - “error codes”
of the installation manual).
Error code:
Cause:
The burner’s lock-out device has intervened due to:
- no gas supply (in this case check that the gas service cock
is open
- presence of air in the piping (if it is a new system or after a
long inactivity of the boiler).
Elimination of the fault:
Check that the gas service cock is in the On position and that
the air present in the piping has been vented.
Press the reset key to restore correct boiler operation.
If the cut-off device operates repeatedly (a
maximum of 3 times), causing boiler shu-
tdown, do not try to relight the boiler your-
self. Contact your nearest Unical authorized
After Sales Service Centre.
°C
Error code:
Meaning:
Too low water pressure in the C.H. circuit
Elimination of the fault:
Restore the correct pressure value by regulating the boiler’s
filling valve (for correct boiler operation the pressure should
be between 0,8 and 1 bar).
When the correct pressure value has been reached the led
will switch off automatically and normal boiler operation will
be restored.
DANGER!
If the system has to be frequently restored
please contact an authorized Unical After
Sales Service Centre.
WARNING!
This feature will operate only if the electrical
supply to the boiler is On (green Power On led
illuminated).
However, further frost protection can be incor-
porated by using specific frost protection pro-
ducts, suitable for multi-metal systems.
Do not
use anti-frost products for motor vehicles
because they could seriously damage the
water gaskets.
If, for any reason, there is no gas or electrical
supply, the above described frost protection
mode will not be active.
Filling
valve
The user can intervene and restore the
operation of the boiler only in presence of the
following codes:
·
LP (boiler water pressure too low)
·
— (burner lockout)
With all the other error codes the user is NOT
AUTHORIZED to try to restore the boiler
operation.
He has to address him self to an UNICAL
authorized after sale service.
