Eliminating Faults - Festo DPA Series Operating Instructions Manual

DPA−...
6 Accessories
Designation
Safety start−up valve
for input pressure
for high pressure
Silencer
Support bracket
Manometer
Compressed air reservoir
Regulator lock
Fig. 11
7

Eliminating faults

Fault
High pressure
fluctuates too
much
The desired high
pressure is not
reached
Flow too low
Flow too low
Pressure booster
does not start
Fig. 12
Festo DPA−... 0405b English
Possible cause
Air consumption of
downstream equipment too
high
Input pressure too low
Too many consuming
devices on the output
Silencer, tubing or screw
connectors with insufficient
flow used
Insufficient air volume at
compressed air input
Fault in commissioning /
unfavourable operating
conditions (valve in
mid−position)
Type
HEL−...
HE−...−D−.../HEE−...−D−...
U−y−B; U−½−B; U−M3
HUA−..
DPA−...−MA−SET
VZS−...
LRVS−D−...
Remedy
Use a compressed air reservoir in
accordance with the section
Accessories"
Inrease the input pressure
Use only components of sufficient
sizes
Increase volume at compressed air
input (e.g. with large compressed
air reservoir)
Briefly pressurize the switching
valve by pressing the manual
override 6 (Fig. 1 and Fig. 10)
17