grandimpianti C 200/51 Instructions Pour L'installation Et Mode D'emploi page 60

If the contact of the flue pressure gauge is open for 2 seconds, the buzzer is activated for
1 minute and the display shows "AL1".
The heating is then off. You must then check the direction of rotation of the ventilators (arrows
on the motor) if this is a start-up, or check your exhaust system (if the alarm disappears when
you disconnect the demister outlet pipe above the machine, there is a strong possibility that
your piping is too narrow or obstructed).
The alarm is not checked for the first 10 seconds of operating of the ventilator, in order to
allow the air flow to normalise.
The alarm is automatically annulled when the contact of the pressure gauge returns to its
position or when the machine is turned off.
THERMAL VENTILATOR (AL4)
In the case of intervention of the thermal relay of the ventilator, the buzzer is activated for
1 minute and "AL4" appears above the display:
The ventilator and the heating are deactivated, and the machine stays on.
The alarm goes off automatically upon the resumption of normal conditions (contact of the
thermal relay closed) or upon turning the machine off.
The causes of this alarm are generally a soiled ventilator.
VARIATOR ALARM (AL5)
In the case of intervention of the variator alarm, the buzzer is activated for 1 minute and
"AL5" appears above the display:
The machine goes off automatically.
The alarm may be eliminated by re-lighting the machine or turning the power supply off and on.
This fault may arise from a surcharge of the cylinder motor due to jamming in the machine
or if the cylinder motor is soiled.
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DOC MACHINE Ø50.0-EN by PS on 19/06/2015, Page 26 of 33