Graco SaniForce 515, Instructions For Use Manual

Page: 13 / 28

Troubleshooting
3A1973L 13
Troubleshooting
1. Follow the Pressure Relief Procedure , page 11.
2. Check all possible problems and causes before dis-
assembling the pump.
PROBLEM CAUSE SOLUTION
Pump will not cycle, or cycles once
and stops. Air valve is stuck or dirty. Disassemble and clean air valve.
See page 14. Use filtered air.
Check valve ball is severely worn and
wedged in seat or manifold. Replace ball and seat. See page 16.
Pump cycles at stall or fails to hold
pressure at stall. Worn check valve balls, seats, or
o-rings. Replace. See page 16.
Check valve ball wedged in seat. Repair or replace. See page 16.
Worn diaphragm shaft seals. Replace. See page 16 (standard dia-
phragms).
Pump operates erratically. Clogged suction line. Inspect; clear.
Sticky or leaking check valve balls. Clean or replace. See page 16.
Diaphragm ruptured. Replace. See page 16 (standard dia-
phragms) or page 18 (overmolded
diaphragms).
Restricted exhaust. Remove restriction.
Air bubbles in fluid. Suction line is loose. Tighten.
Diaphragm ruptured. Replace. See page 16 (standard dia-
phragms) or page 18 (overmolded
diaphragms).
Loose inlet manifold, damaged seal
between manifold and seat, or dam-
aged manifold o-rings. Tighten manifold clamps, or replace
seats or o-rings. See page 16.
Loose diaphragm shaft bolt or fluid
side diaphragm plates. Tighten or replace. See page 16
(standard diaphragms).
Fluid in exhaust air. Diaphragm ruptured. Replace. See page 16 (standard dia-
phragms) or page 18 (overmolded
diaphragms).
Loose diaphragm shaft bolt or fluid
side diaphragm plates. Tighten. See page 16 (standard dia-
phragms).
Worn diaphragm shaft seals. Replace. See page 16 (standard dia-
phragms).
Pump exhausts air from clamps. Loose manifolds, damaged seal
between manifold and seat, or dam-
aged manifold o-rings. Tighten manifold clamps, or replace
seats or o-rings. See page 16.
Air valve o-ring is damaged. Inspect; replace. See page 14.
Pump leaks fluid from check valves. Worn or damaged check valve o-ring. Inspect; replace. See page 16.
No fluid output, and pump cycles
rapidly. Pump mounted incorrectly. Mount the pump in the upright posi-
tion.
Pump leaks air through the exhaust
port. Worn air valve u-cups. Inspect; replace. See page 14.