Ariston E-COMBI 24 30 38 - Manual (Page 32)

boiler protection devices
32
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 fl exible 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.
Table summarising error codes
Green Leds
Temperature indicator
Reset
Note
Description ❍ = flashing light
● = lit 40 50 60 70 80 90 yellow red
● ● X Overheat
● ● ● X Insuffi cient circulation
● ● ● Insuffi cient water pressure (request fi lling)
● ● ● 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
● ● ● Insuffi cient 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 fl ame 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
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 fl ow 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 fl ow 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 fl ow, after this the
burner will fi re (heating position) until a temperature of > 30°C is
detected.
If the central heating fl ow temperature is < 3°C, the burner will fi re
(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 fi re 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.