Boiler Protection Devices; Anti-Frost Device; Table Summarising Error Codes - Ariston CLAS HE R 12 Installation And Servicing Instructions

Boiler protection devices

The boiler is protected from malfunctioning by
means of internal checks performed by the 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 display which refers
to the type of shut-off and the reason behind it.
There are two types of shut-off:
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; the
error is indicated by the «Err» symbol which appears
on the display and the error code.
In fact, as soon as the cause of the shut-off disap-
pears, the boiler starts up again and continues to
operate normally.
While the boiler is shut off for safety reasons it is
possible to attempt to restore normal operation by
switching the appliance off and on again using the
on/off button on the control panel.
If after attempting this the boiler still shows a safet
shut off, switch it off and ensure that the external
electrical switch is in the off position.
Shutdown
This type of error is "non-volatile", which means that
it is not removed automatically. To restore normal
operation press the
panel.
The first figure of the error code (e.g. 1 01) indicates
within which operational assembly the error
occurred.
1 - Primary Circuit
3 - Internal Electronic Part
5 - Ignition and Detection
6 - Air inlet - flue gas outlet
Malfunction warning
This warning is shown by the display in the following
format:
5 P1 = FIRST IGNITION ATTEMPT UNSUCCESSFUL
the first figure indicating the operational assembly is
followed by a P (warning) and the code relating to
the specific warning.
Important
If this shutdown occurs frequently, contact an
authorised Technical Service Centre for assistance.
For safety reasons, the boiler will permit a maximum
of 5 resets in 15 minutes (5 presses of the RESET
button); at the 6th attempt within this 15-minute
period the boiler will shut down and may only be
operated again after the electricity supply has been
disconnected. If the shutdown is occasional or an
isolated event, this is not a problem.

Anti-frost Device.

The anti-frost function acts on the central heating
flow temperature probe, independently from other
regulations, when the electrical supply is turned on.
If the primary circuit temperature is between 3°C
and 8°C the pump will run until the temperature
reaches > 9°C.
If the flow temperature remains between 3°C and
button on the control
boiler protection devices
8°C the pump will continue to run for a maximum of
0 minutes unless a temperature above > 9°C is de-
tected in the central heating flow, after this the the
burner will fire (heating position) until a temperature
of > 30°C is detected.
If the central heating flow temperature is < 3°C, the
burner will fire (heating position) at minimum power
until the temperature reaches > 30°C, the burner will
go out.
If lockout is caused by overheat the burner will not
fire but the pump will continue to run.
The anti-frost device activates only when (with the
boiler operating correctly):
- the boiler is electrically powered;
- there is a supply of gas.

Table summarising error codes

Central Heating circuit
Description
Display
1 01 Overheat
1 03
1 04
Insufficient circulation
1 05
1 06
1 07
1 10 Flow temp. probe circuit open / short circuit
1 12 Return temp. probe circuit open / short circuit
1 14 External sensor circuit open / short circuit
1 18 Heating delivery probe problem
1 P1
1 P2 Insufficient circulation indication
1 P3
Internal P.C.B.'s
3 01 EEPROM error
3 02 Comunication error
3 03 Main P.C.B. error
3 04 Too many (> 5) resets in 15 minutes
3 05 Main P.C.B. error
3 06 Main P.C.B. error
3 07 Main P.C.B. error
Ignition and Detection
5 01 No flame detected
5 02 Flame detected with gas valve closed
5 04 Flame lift
5 P1 1st Ignition Failed
5 P2 nd Ignition Failed
5 P3 Flame cut-off
Air Inlet / Flue gas outlet
6 04 Insufficient fan speed
6 10 Thermofuse open
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