Trebor 20 PURUS - Manual (Page 11)

P20 PUMP OPERATION / MAINTENANCE MANUAL PAGE 11
7 TROUBLESHOOTING
Pump Will Not Start, Fails to Operate
Cause: Solution:
 Insufficient 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 (if applicable).
 Debris in shuttle valve  Inspect/clean control valve assembly.
 PC7 (if applicable)  Refer to PC7 Manual
Bubbles in Fluid Discharge
Cause: Solution:
 Inlet line fittings not tight  Check and tighten all fittings on the suction line feeding
the pump.
 Flow too high  Under high flow conditions some fluids can cavitate
releasing dissolved air bubbles.
 Diaphragm failure due to puncture  Contact Trebor Customer service for additional service
recommendations. Replace pump.
Fluid Leaks
Cause: Solution:
 Weld failure of fluid pump  Replace pump (Non Serviceable)
 Fluid leaking from suction or discharge
connections  Inspect tubing and tighten fluid fittings.
Erratic Cycling
Cause: Solution:
 Debris in shuttle valve  Inspect/clean control valve assembly.
 PC7 (if applicable)  Refer to PC7 Manual