Primus RF6 Programming Manual page 121

points on the drum pulley.
2. Check the wiring.
3. Check the well functioning of the speed sensor.
(The actual speed value is available at the
Service – State menu)
4. Check the electronic board.
(Inputs can be checked one by one in the
Service menu)
FAILURE 46: BRAKE STAYS CLOSED
F120 machine only. Failure 46 occurs when the mechanical brake stays closed. When the brake stays
closed, at acceleration at spin between 250 and 350 RPM, a too high motor current is detected and the
machine is stopped at once. The machine should not be operated when the brake is out of order. As the
machine operation is deteriorated an intervention of a technician is required.
DIAGNOSE:
1. Check if the main air pressure is available.
2. Check if the air pressure that controls the brake
is available.
3. Check the brake control signal wiring that
commands the brake air pressure valve.
4. Check the output relay that powers the control
signal for the brake air pressure valve.
5. Check the output relay that powers the control
signal for the brake air pressure valve.
FAILURE 47: BREAK WEAR OUT SIGNAL
F120 machine only. Failure 47 occurs when the friction blocks of the brake are weared out. At the moment
that the friction blocks are almost vanished, two wires will be short circuited when they touch the metal
friction plate. The friction blocks must be replaced at once to avoid heating up of the mechanical brake as this
can damage the machine and lead to an unsafe state.
DIAGNOSE:
1. Check if the friction blocks must be replaced.
2. Check if the wiring of the input signal Break
Wear Out is not damaged.
3. Check the electronic board.
(Inputs can be checked one by one in the
Service menu)
FAILURE 48: BRAKE STAYS OPEN
F120 machine only. Failure 48 occurs when the mechanical brake stays open. When the brake stays open,
the free run time of the machine at deceleration after spin will be much bigger then normal. The machine is
still operational when the brake is out of order. But as the machine operation is deteriorated an intervention of
a technician is required.
DIAGNOSE:
1. Check if the main air pressure is available.
2. Check if the air pressure that controls the brake
is available.
3. Check the brake control signal wiring that
100962 G PUBLICATION DATE 24 JUN 2008.DOC
distance.
If the wiring is damaged: repair the wiring.
If the speed sensor is broken or not well
functioning, replace the speed sensor.
If the input of the electronic board is not
functional, replace the electronic board.
Apply the correct air pressure.
If the air pressure valves are out of order, repair
or replace the corresponding air pressure
valves.
If the wiring is damaged: repair the wiring.
If the relay receives a command signal but is not
closed, replace the electronic board
If the relay does not receives a command
signal, replace the electronic board
If the friction blocks have almost vanished, they
must be replaced.
If the wiring is damaged: repair the wiring.
If the input of the electronic board is not
functional, replace the electronic board.
Apply the correct air pressure.
If the air pressure valves are out of order, repair
or replace the corresponding air pressure valves.
If the wiring is damaged: repair the wiring.
PROGRAMMING MANUAL 119