Accorroni GHIBLI 4-5-6 ELITE Technical Information page 24

- Restore the connection or replace the
electrode including the cable. Do not make
joints to avoid reducing the cable insulation
level.
c) The ignition electrode is not correctly
positioned or its ceramic insulation is
damaged, with a subsequent leakage of the
ignition discharge.
- Replace the electrode including the cable.
7.2.3 At the end of the pre-ventilation phase,
the ignition electrode discharges, but the
flame is not formed and the control equipment
locks out within the safety time.
a) No gas supply or there is air inside the piping.
- Determine why there is no gas supply first
checking the on-off components on the feed
line. Completely bleed off any residual air and
restart the appliance.
b) The gas solenoid valves do not open because
the coils are malfunctioning or their electrical
connection has been interrupted.
- Check if the connection cable and relative
terminals have been damaged. Use a special
tool to verify that the coils have failed and
replace them, if necessary (see point 8.3).
c) The safety thermostat is malfunctioning and
does not allow the solenoid valves to open.
- Replace the safety thermostat (see point 8.5).
7.2.4 At the end of the pre-ventilation phase,
the ignition electrode discharges, the flame
is formed correctly, but the control equipment
locks out within the safety time.
a) The phase-neutral electric power supply is
not correctly connected to the respective
terminals, marked as "L" and "N" and reversing
the polarity may de-activate the flame
detection device.
- Check using a multimeter or phase detector
and correctly connect the cables to the
corresponding terminals.
b) The flame detection electrode is not correctly
positioned and is not in contact with the flame.
- Check if the electrode is properly connected
and if there are any deformations. Comply
with what is indicated in figure 28.
c) The flame detection electrode electric
connection has been interrupted.
- Check the electrode connection to the control
equipment. If the cable or ceramic insulation
is damaged, replace the electrode in
accordance with the positions indicated in
figure 28.
d) The flue gas exhaust fan motor is malfunctioning
or does not operate correctly because the
intake/exhaust duct is obstructed.
- First eliminate any obstructions in the terminal
and, if necessary, replace the fan, making
sure to re-assemble the unit as shown in fig.
29 (see point 8.8)
7.2.5 The control equipment locks out during
normal operation
a) The gas supply was cut off and the equipment,
after repeating the ignition cycle, and without
detecting the flame within the safety time
period, entered the lock out mode.
- Determine why the gas supply prior to the air
heater was interrupted. Restart the appliance
using the Reset button on the control panel.
b) The incorrect positioning of the external intake
and exhaust terminal has caused combustion
products to return and this prevents the flame
from being formed and therefore from being
detected by the electrode.
- Check that the terminal is not installed inside
niches or recesses in the walls and that there
are no obstructions that prevent the air from
circulating.
c) The safety thermostat cuts off the supply to
the gas solenoid valve because overheating
has occurred due to incorrect operation or a
failure of the convection fan.
- Check for obstructions or dust deposits on
the fan and/or relative grille. Replace the
malfunctioning fan, if necessary (see point
8.8).
d) The safety thermostat cuts off the supply to
the gas solenoid valve because overheating
has occurred due to incorrect operation of the
fan control thermostat.
- Replace the fan control thermostat (see point
8.4).
7.2.6 The burner stops while it is operating,
even if the room temperature does not
require it
a) The room thermostat is defective.
- First check that the thermostat sensor is in
the correct position and that its operation has
not been affected by dust deposits. Otherwise,
replace the defective room thermostat.
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