DEC PTS 50 - Page 42

MAN-PTS-GB, Revision 9, BSC, 15-FEB-2017 42/46
N° Problem
Probable cause Solution
The external signal "Operation
authorization" is not activate
(option on the control panel).
The emergency stop is activated
(option on the control panel).
Verify the logic of the control
panel.
Deactivate the emergency
stop.
9 The vacuum pump
switches off (refer to the
instructions in the manual
of the manufacturer).
Check the direction of the
rotation of the vacuum pump.
The motor is not correctly
connected.
The thermostat of the vacuum
pump is undersized.
The vacuum pump has not been
installed correctly. Mechanical
stress on the shaft of the vacuum
pump.
The exhaust gas pipe of the
vacuum pump creates too much
of a pressure drop.
Modify the electrical
connection.
Modify the electrical
connection.
Verify the amperage of the
motor.
Level the vacuum pump. The
shaft of the vacuum pump
must be able to turn freely.
Verify the dimensions of the
pipe and avoid restrictions.
10 The pressure supply or
discharge pressure is
insufficient.
The discharge pressure is too low.
The pressure regulator is
undersized.
The supply pipe is undersized.
The compressor or tank for the
compressed gas is undersized.
The pressure valve is installed too
far away from the PTS body.
A filter installed in the pressure
pipe is plugged up.
The pressure regulator is
defective.
Increase the discharge
pressure.
Change the pressure regulator
according to the prescriptions
of the manufacturer.
Increase the diameter of the
pipe.
Increase the capacity of the
compressor or of the tank.
Decrease the distance
between the pressure valve
and the PTS (< 2m).
Clean or replace the filter.
Replace the pressure
regulator.