Ariston E-COMBI 24 30 38 manual Boiler protection devices

boiler protection devices

Boiler protection devices

The boiler is protected from malfunctioning by means of internal checks performed by the electronic microprocessor P.C.B., which stops the boiler from operating if necessary.

In the event of the boiler being shut off in this manner, the led code shows 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 yellow led 9 blinks and green CH temperature leds 1 indicate the error code- see table below.

As soon as the cause of the shut-off disappears, the boiler starts up again and continues to operate normally.

Note : In the event of insufficient water pressure inside the heating circuit, the boiler will perform a safety shut-off (yellow led 9 blinks - leds 50-60 blink – see table). To re-pressurise the boiler, it will be necessary to connect the silver flexible hose supplied to the two isolating points underneath the boiler, once the hose is connected, open up both of the black quarter turn handles until the pressure reads 1.5 bar on the pressure gauge. If the pressure drops very frequently, there may be a water leak at some point in the system.

Shutdown

This type of error is “non-volatile”, which means that it is not removed automatically.

The red led 8 light and green leds 1 indicate the error code- see table below.

To restore normal operation press the button on the control panel.

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 button).

Anti-frost Device.

When the electrical supply is turned on the anti-frost function acts on the central heating flow temperature probe, independently from other safety devices.

If the primary circuit temperature is between 3°C and 8°C the pump will run (with the diverter valve switching between central heating and hot water every 1 minute) until the temperature reaches > 9°C.

If the flow temperature remains between 3°C and 8°C the pump will continue to run for a maximum of 20 minutes unless a temperature above > 9°C is detected in the central heating flow, after this 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 (heating position).

The anti-frost device activates only when the boiler operating correctly :

-the system pressure is correct;

-the boiler is electrically powered;

-there is a supply of gas.

Table summarising error codes

		Green Leds						Reset		Note
	Temperature indicator								Description	❍ = flashing light
40	50	60	70	80	90	yellow	red			● = lit
					●		●	X	Overheat
●	●						●	X	Insufficient circulation
	●	●				●			Insufficient water pressure (request filling)
		●	●			●			C.H. Flow temp. probe circuit open / short circuit
			●	●		●			C.H. Return temp. probe circuit open / short circuit
●		●				●			External sensor circuit open / short circuit
●			●			●			Floor thermostat contact open
		●	●				●	X	Heating delivery probe problem
●	●					●			Insufficient circulation
			●			●			EEPROM error
				●		●			Communication error
●	●	●	●	●		●			Too many (> 5) resets in 15 minutes
				●			●	X	Main P.C.B. error
●		●				●			Room sensor circuit open / short circuit
							●	X	No flame detected
	●	●	●			●			Flame detected with gas valve closed
		●	●	●			●	X	Flame lift
●		●		●		●			1st Ignition Failed
	●	●		●		●			2nd Ignition Failed
		●	●	●		●			Flame cut-off
			●	●			●	X	Thermofuse open
	●	●					●	X	Fan speed error

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