F17
Parker Hannifin Corporation
Pneumatic Division
Richland, Michigan
www.parker.com/pneumatics
F
P31P / P23P
PAR15
Problem
Possible Reason
Solution
Display will not light up
No 24 volts power supply
Check if the wiring is connected according to
the schematic wiring diagram
Unit will not, or not correctly respond to
given setpoint
Wrong current applied ( I.e. Volt instead of
mA or mA instead of Volt
Change setpoint current or re configure the
setpoint current through the software by
changing parameter 4
Check wiring if the setpoint signal lead is
connected to the right pin within the male
M12 connector ( should be pin 2)
Setpoint signal is not stable enough
Stabilize setpoint signal input
Display shows NoP.
Unit detects that required output pressure is
higher than the supplied pressure
Adjust the inlet pressure to a higher value,
preferably 0,5 bar higher than requested
output pressure
Give lower setpoint value which corresponds
to a output pressure lower than the inlet
pressure
No inlet pressure at all
Connect port 1 to the supply pressure
Unit behavior is not considered normal
Faulty settings made in the parameters
Reset the unit to factory settings by using the
green key function under parameter 0
Desired pressure can not be reached
Setpoint value to low
Pre-set pressure limit has been changed to a
lower max. outlet pressure
Increase setpoint value
Change max. outlet pressure back to re-
quired pressure by changing parameter 19
Supply pressure is to low
Increase supply pressure
Secondary side stays pressurized
Setpoint value is higher than 0,1 Volt
Pre-set pressure has been enabled to a
certain pressure
Lower your setpoint value, preferably to 0
Volts
Reset parameter 18 to 0
Display shows unrealistic value
Display maybe configured in the wrong value
( bar instead of psi)
Check through parameter 14, if the display
value is set on either psi or bar, if necessary
change it to the required setting
Unit response time too slow or too quick
Volume behind the unit is either too big or
too small
Adjust the regulating speed of the unit
through parameter 20
Unit gives too much overshoot
Relation between volume and response me
is out of balance
Adjust response time to a higher value
through parameter 20, to achieve more ac-
curate behavior
Unit is adjusting/regulating constantly
Air leakage in the system behind the unit
Constant changing volume behind the unit
“Deadband “area is set too small
Resolve leakage
Unit needs to regulate to keep required pres-
sure at the same level
Try to minimize the volume changes
Enlarge deadband setting through parameter
13 in the software ( parameter 20 has to be
set to 0 before changing parameter 13)
Can not enter software through touchpad
Unit is currently working/processing
Make sure that the unit is in steady state
while activating the software
Activating time is too short
Hold the accept button for at least 3 seconds
Display indicates ‘OL’
Wiring not according to diagram (24 volt con-
nected on the setpoint connection pin)
Rewire so that on the setpoint connection pin
will be either 0-10v or 4-20mA
Wrong setpoint value given in relation to
programmed setpoint value acceptance
Change over setpoint value to either V or mA
or Reprogram the unit to the correct setpoint
value via parameter 4
Any other problem
Please consult factory
Catalog 0700P-E
Troubleshooting Guide
P31P / P32P Series
Electronic Proportional Regulators
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