GB
7.2
Diagnosing the alarm status/inconveniences-faults
If you are unable to rectify the anomaly encountered on your compressor contact your nearest
authorised service centre.
Cod.
Alarm
5,5-20
AL3
Hp
5,5-20
AL1
Hp
5,5-10
Hp
AL4
15-20
Hp
5,5-20
Hp
Before doing any job on the compressor ensure that:
• The main ON/OFF switch is turned Off (position "0")
• The button EMERGENCY/STOP is pressed in secury position
• The compressor is shut-off from the compressed air system
• The compressor and the internal pneumatic circuit are completely de-
pressurised
Anomalies
Machine
stopped:
the compressor
5,5-20
does not start
Hp
The machine
stops, as the
oil alarm has
5,5-20
triggered.
Hp
Machine
stopped-motor
thermal
protection
switch tripped.
5,5-10
Hp
Machine
stopped:
temperature
thermostat
tripped.
15-20
Hp
The
compressor is
5,5-20
running but
Hp
fails to load.
Causes
Emergency
button
pressed
5,5-20
Hp
Wrong
rotation
direction
Excessive
temperature
of air/ oil mix
5,5-20
outlet from
Hp
the screw
(105 °C).
The thermal
protection
switch of the
motor has
tripped.
5,5-10
Hp
The internal
thermal
protection
switch of the
fan motor
15-20
has tripped.
Hp
The
suction
5,5-20
valve fails
Hp
to open
90
Solutions
Clockwise to unlock the emergency button,
press the reset button on the control panel.
Switch off power to the compressor and
reversing two phases of the power cable
on the terminals for connection of the
cable line.
Check the oil level. Check if the radiator is
clean. To restart the compressor press the
RESET key on the main board.
Check if the electrical powers supply is
correct, check if the three power supply
phases are more or less at the same
value.
Check if the cables are firmly fitted to the
terminal board, check if the electrical
cables have melted. Check if the fan in-
take grid is clean or obstructed (paper,
leaves, rags).
To restart the compressor press the
RESET key on the main board..
Check if the electrical powers supply is
correct, check if the three power supply
phases are more or less at the same
value.
Check if the cables are firmly fitted to the
terminal board, check if the electrical
cables have melted. Check if the fan motor
in-take grid is clean or obstructed (paper,
leaves, rags).
To restart the compressor press the
RESET key on the main board..
Check if the pressure probe is working
correctly and also if the commanding
solenoid valve (NC solenoid valve) is
working regularly.