User guide

PC7 CONTROLLER OPERATION / MAINTENANCE MANUAL PAGE 15
5 TROUBLESHOOTING
Controller Will Not Operate or Cycles Erratically
Cause: Solution:
•
PC7 cap seal failure
•
Remove caps from PC7 and replace PTFE cap seal.
•
Debris in shuttle valve
•
Isopropyl alcohol clean the shuttle sleeve and spool assy.
•
Insuffisant air pressure
•
Increase regulated supply pressure or check control
valves for proper operation.
Rotate PC7 speed control screw CW until it stops. Then
readjust for correct speed.
•
Adjustment Screw Seal failure
•
Replace adjustment screw assy.
•
Spring bar failure
•
Spring bar needs replacement if not flat.