Technical documentation
Technical documentation
STEME ed 07/03
28
EOLO MINI
NTC delivery sensor fault
(NM)
In case of NTC delivery sensor (NM) breakage, the low-voltage circuit prevents burner
operation.
The tripping of this device is indicated by the flashing of yellow LED LD1.
Overheating lock
(TS1 and TS2))
In the event of the overheating thermostat (TS1 and TS2) contact being opened, boiler
operation is stopped.
To start the appliance again, the main switch (IG) must be temporarily moved to
RESET position and a central-heating request made.
The tripping of the safety device is indicated by the flashing of LED LD2 (red).
Pump post- circulation
To prevent the water/gas exchanger from overheating, at the end of each heating
request (opening of room thermostat or antifreeze), the circulator is kept operating for
30 seconds.
Sealed chamber post-
ventilation
Once the burner has switched off after any request, the combustion chamber is washed
by keeping the fan (MV) working for 20 seconds.
INDICATORS
LD1
(yellow LED)
LD2
(red LED)
Depending on their state, these indicate:
off off
- boiler off (no power)
flashing
ON = 0.2 s
OFF = 4,5 s
off
- boiler in stand-by (from serial number 2238341)
(request standby)
flashing
ON = 1 s
OFF = 1 s
off
- NTC delivery sensor (NM) breakage
flashing
ON = 1 s
OFF = 1 s
on
- no circulation / bad circulation safety operation (from serial
number2238341)
(no water, pump blocked etc.)
on off
- burner operating
off flashing
- overheating block or presence of parasite flame
off on
- ignition failure block
simultaneous flashing
- flue pressure switch (SV) interception failure
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