VERDER HI-CLEAN VA-2H80 Repair Parts page 8

Troubleshooting
Problem
Problem Problem
Reduced pump
performance.
Leak in inlet or outlet
sanitary fitting.
Fluid in exhaust air.
Pump exhausts excessive
air at stall.
Pump leaks air externally.
Pump leaks fluid
externally from joints.
Chattering.
8
Cause
Cause Cause
Clogged suction line.
Sticky or leaking check balls.
Diaphragm ruptured.
Pilot valves damaged or worn.
Air valve damaged.
Air valve gasket damaged.
Air supply erratic.
Exhaust muffler icing.
Restricted exhaust.
Loose sanitary clamp.
Damaged or worn gasket.
Misalignment of inlet/outlet fluid line
or pipe.
Gasket does not seal.
Diaphragm ruptured.
Loose diaphragm plate.
Worn air valve cup or plate.
Damaged air valve gasket.
Damaged pilot valve.
Worn shaft seals.
Air valve or fluid cover clamps loose. Tighten.
Diaphragm damaged.
Air valve gasket damaged.
Air cover gasket damaged.
Loose manifolds, damaged seal
between manifold and seat,
damaged gaskets.
Check valve balls not seating
properly/cleanly due to imbalance
between fluid inlet and outlet line
sizing. Noise is accentuated with
light viscosity fluids.
Solution
Solution Solution
Inspect; clear.
Clean or replace.
Replace. See standard or overmolded
diaphragm repair procedure.
Replace pilot valves.
Replace air valve.
Replace air valve gasket.
Replace air supply.
Use drier air supply.
Remove restriction.
Tighten clamp.
Replace gasket.
Use flexible fluid lines at pump inlet and outlet.
Install correct air cover gaskets for the type of
diaphragms in use. See parts list for correct
gaskets.
Replace. See standard or overmolded
diaphragm repair procedure.
Tighten or replace. See standard or
overmolded diaphragm repair procedure.
Replace.
Replace gasket.
Replace pilot valves.
Replace. See standard or overmolded
diaphragm repair procedure.
Replace diaphragm.
Replace gasket.
Replace gasket.
Tighten manifold clamps or replace seats or
clamps.
Reduce size/diameter of inlet line relative to
outlet line. Outlet line size should not exceed
pump size.
812.0066