4 Commissioning
Festo – P.BE-MPA-E N – 1309f – English 97
4.7 Error handling
4.7.1 Impairment of functions
After switching on the compressed air supply or when subsequently testing the individual valves, you
can learn the following about the operating status of the pneumatic system:
Operating status of the pneumatic system
Error handling when the compressed air supply
has been switched off
Air flows out at common-line or working-line con-
nections
• Check tube assembly
Valve or pneumatic system does not react as ex-
pected
• Check the installation of the tubing lines
• Check the electric cables
Valve or pneumatic system does not react • Bring the detenting manual override into the
initial position
• After switching on again, check the operating
pressure (if necessary for each pressure
zone). Set operating pressure in accordance
with instructions in chapter 3.
• Servicing required
Valve terminals with regulated external pilot air
supply:
• After switching on again, check the pilot
pressure (adjust in accordance with the
operating pressure if necessary, chapter 3
or Appendix A, Fig. A.1 … Fig. A.5)
Tab. 4.9 Function impairment of the pneumatic system
Operating status of the propor-
tional pressure regulator
Possible cause Remedy
Proport io nal pressure regulator
does not react
Supply voltage not applied,
POWER LED or display does not
light up.
• Check the 24 V DC supply
voltage.
No supply pressure • Switch on supply pre ssure.
Setpoint value reached • Modify setpoint v alue.
Proportional pressure regulator
defective
• Send the valve to the Festo
repair service.
Flow rate too low Restriction of the flow cross
section due to connection tech-
nology (swivel fittings)
• Use alternative connections.
Pressure increa se too slow Large cylinder volume and long
tube length
• Select another parameter
record.
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