Nordcap MORETTI T75G Mode D'emploi page 59

5.21.1 TROUBLESHOOTING T64G
FAILURES
When the main breaker is set to on,
the control panel will not switch on
When the main breaker is set to on,
the control panel switches on and the
temperature measurement is 573
The burner doesn't ignite and
is blocked (brn BLOC) o permanent
block (ALL 7)
The burner ignites and is locked-out
after a few seconds (brn BLOC)
CAUSES
Grid voltage missing
Bad cable connection or plug
Blown fuse
Electronic board damaged
The thermocouple signal fails to
reach the electronic board
Thermocouple damaged
Gas tap closed
Ineffectiveness of the igniter
Inverted live and neutral
Ineffectiveness of the detector
Inefficiency of the detector in the
burner modulation range
Ineffective earth connection
Lack of gas
UK/22
SOLUTIONS
Check that the socket where the
appliance is connected is powered.
Place the connecting cable and plug.
Replace the fuse
Replace the electronic board
Ensure it is connected and the
compensated cable is intact and
connected to the thermocouple.
Replace thermocouple
Open the gas valve and switch on to
remove air from the tube
Ensure that the scintillator is at the
correct distance and is properly
connected; also ensure that the
ground cable is connected from the
flame control board to the gas valve.
NOTE: The burner automatically
executes 3 start cycles before
displaying the alarm brn LOCK
NOTE: In case of ALL7 switch off
and restart the equipment to release
the flame control from the permanent
blocking state
Inverted live and neutral wires.
Ensure that the detector is at the
correct distance and that it is properly
connected
Ensure that the detector is not
deformed, and reset in the correct
distance if necessary
Check electrical connection of the
earth. Ensure an effective earth
connection
Ensure continuous gas supply.