Robur Supercromo - 7.4.1 Case 1: The Appliance Locks Out During the First Start-Up Phase; 7.4.2 Case 2: The Appliance Locks Out During Normal Operation

Maintenance
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 There is a full electricity supply.
 The gas is supplied.
 The supply pressure at the burner is within the
specied tolerance range.
Only at this point proceed with the specic
troubleshooting.
Before removing the casing to gain access to the
electrical panel, disconnect the gas-red convector
from the two-pole switch located upstream of the
radiator, or remove the power plug.
7.4.1 Case 1: the appliance locks out during the
rst start-up phase
A. There is no adequate gas ow to the gas-red convec-
tor. Check that no taps or manual valves are closed. If
the appliance has not been used for a long period of
time there may be air in the pipes. Therefore, try the
ignition several times after the error has been reset.
B. The polarity of the power supply is incorrect: check
it. If using an external plug, remove it from the socket
and reinsert it by turning it 180°.
C. One of the ignition electrodes is broken or badly posi-
tioned: replace it or reposition it.
For a correct ignition, the distance between the
two ignition electrodes must be about 3-5 mm.
D. The detection electrode is broken or badly positioned:
replace it or reposition it.
E. One of the ignition electrodes or the relevant cable is
in contact with the casing or other metal parts: check
by removing the casing and removing the contact.
F. Failure of the ignition equipment: replace it.
7.4.2 Case 2: the appliance locks out during
normal operation
A. The limit thermostat has tripped to limit overheating
caused by:
 Obstruction on upper hot air outlet: remove ob-
struction.
 Fan fault: replace it.
B. Fault in the fan thermostat. The fan thermostat does
not allow the fan to turn on: replace it.
C. Gas valve fault: replace it.
When replacing the gas valve, it is necessary, as
required by current regulations, to seal the nozzle
holder with a sealant that complies with EN 751-1
and EN 751-2 (i.e. suitable for gas tightness). Check
the pressure at the burner after replacing the gas
valve.
D. Bad connection of the limit thermostat: check cables
and connections.