Sotera SP100-05X-XX-XXX-X - Manual (Page 10)

10
Motor blows air out main exhaust when stalled
on either stroke.

U-cups inserted incorrectly, damaged, or
missing.

Ceramic valves damaged or contaminated
with debris (7).

Pilot valve not correctly oriented.

Check (2B & 2D) U-cups on major valve
spool.

Check (7) ceramic valves for debris or
damage.

Be certain to load the pilot valve in the
proper orientation per diagram found within
the center-body.
Low fluid output volume.

Low or blocked incoming air supply.

Outlet plumbing blockage.

Pump not primed.

Suction pipe too small or suction hose not
rigid (kinks or collapses).

Leak in inlet suction plumbing.

Pump blocked internally with debris

Check air supply.

Check for any obstruction in the outlet
plumbing.

The pump must be mounted vertically for
checks to properly work.

Check for pump cavitation - the suction pipe
should be sized at least as large as the inlet
thread diameter. The suction hose must be
rigid or non-collapsible.

Check all inlet plumbing for possible suction
leaks.

Inspect the pump for debris that could block
TROUBLE SHOOTING
Symptom Possible Cause Repair
Fluid discharged from exhaust outlet

Ruptured Diaphragm (20)

Diaphragm Nut loose (4A)

Replace Diaphragm (20)

Tighten loose Diaphragm Nut (4A)
Air bubbles in fluid discharge.

Leak in suction side plumbing

Leak at Inlet Collar (4C)

Leak at Diaphragm Nut (4A)

Check connections of suction plumbing.

Check torque of Inlet Collar (4C)

Check torque of Diaphragm Nut (4A)