Ariston CLAS NET One User Manual - Page 9

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Appliance shut-off conditions

The boiler is protected from malfunctions by means of internal

checks performed by the electronic P.C.B., which stops the boiler

from operating if necessary. In the event of the boiler being shut

off in this manner, a code appears on the control panel display

which refers to the type of shut-off and the reason behind it.

Two types of shut-off may occur:

Safety shut-off

This type of error is "volatile", which means

that the boiler starts up again automatically

as soon as the problem which caused the

shut-off is removed;

(

code

e.g.

display and the

symbol appears.

In fact, soon as the cause of the shut-off

disappears, the boiler starts up again and

continues to operate normally.

If the boiler still indicates a safety shut-off,

switch it off. Make sure the external electric

switch is in the OFF position, shut off the gas valve and contact a

qualified technician.

Safety shut-off due to insufficient water pressure

If the water pressure inside the heating circuit is insufficient, the

boiler will perform a safety shut-off.

Code 108 (

) will appear on

the display.

The system may be restarted, re-balancing

the water pressure, by using the filling

procedure - see note 1.

If the re-balancing request is performed

on a frequent basis, switch the boiler off,

bring the external electric switch to the OFF

position, shut off the gas valve and contact

a qualified technician to check for any leaks

of water.

NOTE 1 - FILLING PROCEDURE

RE-ESTABLISH THE CORRECT PRESSURE USING

THE FILLING LOOP (POSITIONED UNDERNEATH THE

BOILER) AND PRESS THE MODE BUTTON FOR 5

SECONDS. THE DISPLAY SHOWS "PURGE".

WHEN THE PRESSURE GAUGE INDICATES A PRESSURE

OF 1 BAR, CLOSE THE FILLING VALVE AND PRESS THE

MODE BUTTON.

THE DISPLAY RETURNS TO NORMAL VIEW.

Operation shutdown

This type of error is "non-volatile", which means that it is not

removed automatically.

On the display flash

and appears the symbol

In this case the boiler does not restart automatically, but it may be

reset by pressing the

If the problem manifests itself again after several attempts to

reset the appliance, contact a qualified technician.

Important

If this shutdown occurs frequently, contact an authorised

service centre for assistance. For safety reasons, the boiler

will allow a maximum of 5 reset operations to take place in 15

minutes (individual presses of the

If the shutdown is occasional or an isolated event, this is not

Necessarily a problem.

and the error

)

flash on the

Err/501

and the error code , e.g.

button.

button).

Operation shutdown error table

Display Description

1 01

Overheating

1 03

1 04

1 05

Insufficient circulation

1 06

1 07

1 08

Insufficient water pressure - see Note 1

3 05

P.C.B. error

3 06

P.C.B. error

3 07

P.C.B. error

No flame detection

5 01

Anti-frost Device.

The anti-frost function acts on the central heating flow temperature pro-

be, independently from other settings, when the electrical supply is tur-

ned on. If the primary circuit temperature falls below 8°C the pump will

run for 2 minutes.

After the two minutes of circulation (fixed) the boiler will check the fol-

lowing:

a - if the central heating flow temperature is > 8°C, the pump stops;

b - if the central heating flow temperature is between 4 and 8°C, the

pump will run for another two minutes;

c - if the central heating flow temperature is

< 4°C, the burner will fire (heating posi-

tion) at minimum power until the tempe-

rature reaches 33°C, the burner will go off

and the pump will continue to run for two

minutes.

The activation of the Anti-Frost feature is

symbolised by

The anti-frost device activates only when (with

the boiler operating correctly):

- the system pressure is correct;

- the boiler is electrically powered;

- there is a supply of gas.

USER'S MANUAL