Dyna-Flo Control Valve Services Ltd.
Phone: 780 • 469 • 4000 | Toll Free: 1 • 866 • 396 • 2356 | www.dynafl o.com
P-PS2Q0619A
37
FAQ / TROUBLESHOOTING
AND SOLUTIONS
6 Valve is opening instead of closing or vice versa...
• Change direction in programming Parameter #7 to RISE or FALL to
whichever is required.
7 If power is interrupted and the connection between the PS2 is
broken...
• The PS2 Positioner will vent all gas inside the actuator on the single
acting Positioner.
• A double acting PS2 Positioner will vent what ever is up stream of port
Y2 and supply full regulator set pressure to Y1, closing or opening the
valve.
• When power is restored and you have 4-20 mA, the unit will power up
and go directly into the Automatic Mode. There is no need for
reprogramming the PS2 Positioner.
8 Positioner goes past 0% or past the closed to a negative value...
• Sign of over travel. This could be due to worn trim.
• Improper calibration - re-calibrate.
9 Valve doesn’t fully open or close...
• Check to see gearing has not been changed either in the Program
parameters or on the physical selection switch.
• Check connections for loose hardware. This causes dead band.
• Check for proper air supply pressure.
• Improper calibration - re-calibrate.
• Valve is plugged with material.
10 Valve actuates too quickly...
• Set restrictor valve to slow down pneumatically (Refer to Figure 17).
• Set ramp up and ramp down time accordingly, in the programming
parameter numbers 10 and 11.
* Consult the Programming parameter chart on Pages 31 & 32 to choose time
increments accordingly.
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