3.7.4.PUMP OVERRUN

The pump overrun may be varied (after the burner has been turned off). To access this function, it is necessary to press the reset button for over 5 seconds and then press it repeatedly until the character “A” appears on the left-hand display.

The following modes are available:

011 minute of pump overrun

033 minutes of pump overrun

066 minutes of pump overrun

099 minutes of pump overrun

1212 minutes of pump overrun

1515 minutes of pump overrun

CO 24 hours of pump overrun

It is also possible to set a continuous pump operation by closing the contact of jumper 4 (see section 2.12.).

3.7.6.REGULATION MENU TABLE

3.7.5.TEST MODE

The P.C.B. allows the boiler to be forced to the maximum or minimum power.

To make the boiler operate at maximum power (100%: 24kW), it is necessary to turn the selector knob “A” (section 3.3.) and, using a

light pressure, bring it to the < > position. To return the boiler to its normal function, turn the selector “A” to the summer or winter position.

NOTE: To force the boiler to its maximum output it is necessary to completely rotate the potentiometer for maximum heating output regulation (PR).

Summary of the functions accessed when the RESET button is pushed for 5 seconds.

3.8.

BOILER SAFETY SYSTEMS

The boiler is protected from malfunctioning by means of internal checks by the P.C.B., which brings the boiler to a stop 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 SHUTDOWN :these group of errors (characterised on the display by the letter “E”) this situation is automatically removed as soon as the cause behind it is resolved.

As soon as the origin of the shutdown disappears, the boiler starts up again and returns to its normal operation.

-SHUTDOWN: (characterised on the display by the letter “A”), it is not removed unless a manual intervention is made.

The boiler may return to operation only if reset by means of pressing the button “H” (see illustration on page 18) located at the centre of the display.

There follows a list of the shutdown modes and the respective codes shown on the display.

Shutdown (“A” type): if such a situation occurs, it is necessary to reset the boiler using the appropriate key. If this shutdown occurs again, an Authorised Service Centre should be contacted.

DISPLAY CAUSE

A01 Too many attempts to ignite on starting up

A02 After three attempts at ignition, no increase in DT was

detected

A03 The heating flow temperature exceeds 100°C during

operation

A07 Too many failures to flame in one period during operation

A19 The flame was detected after the gas valve had closed

A20 The flame was detected before the gas valve opened

A21 The flow switch does not close

A22 The flow switch does not open

A33 Problem with the fan

A99 Problem with the electronic monitoring

NOTE: When there is no ignition, check that the gas cock is open.

Safety shutdown: In the event that a safety shutdown occurs, it is necessary to contact an Authorised Service Centre.

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Ariston 47-116-17 installation instructions Pump Overrun, Regulation Menu Table, Boiler Safety Systems
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47-116-17 specifications

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