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Technical Documentation
No ignition stop
Overheating stop
Sealed chamber post
ventilation
Breakage of NTC
sensor
(B1)
H2
H1
(red led)
(yellow led)
off
off
off
flashing
off
on
on
off
intermittent
off
flashing
simultaneous flashing
off
intermittent
flashing
STCS ed 07/02
Safety devices.
If, within 10 seconds from the start of the ignition cycle, the detection electrode
(E1) fails to detect the presence of a flame on the burner, appliance operation
is stopped.
To start the appliance again, the master switch (S4) will have to be moved to
OFF and afterwards, after returning the switch to ON, the hot water will have to
be run.
The tripping of the safety switch is indicated by the lighting up of red LED H2.
In the event of the overheating thermostat contact (E3) and limit thermostat
being opened, the appliance is stopped.
To start the appliance again, the master switch (S4) will have to be moved to
OFF position and afterwards, after returning the switch to ON, the hot water
will have to be run.
The tripping of the safety device is indicated by the flashing of red LED H2.
After the burner has switched off, at the end of a request, the combustion
chamber is washed and the fan (M1) is kept running for 30 seconds.
Breakage of sensor B1 prevents the appliance for working.
The tripping of the safety device is indicated on the control panel by flashing of
yellow LED H1.
Indicators.
Depending on their condition, these indicate:
water heater off or no operation request
water heater in stand-by
presence of flame
ignition failure stop
overheating stop
fume pressure switch fault or no air
NTC probe fault
18
Technical Documentation
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