Haier 3150 SB User Manual

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Relieve the pressure before checking or servicing the equipment.

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Check all possible problems and causes before disassembling the pump.

Pump cycles at stall or fails to hold 
pressure at stall.

Worn check valve balls (541) or 
seats (233).

Replace. See page 19.

Pump will not cycle, or cycles once 
and stops.

Air valve is stuck or dirty.

Disassemble and clean air valve. 
See page 16. Use filtered air.

Check valve ball (541) severely 
worn and wedged in seat (233) or 
manifold.

Replace ball and seat. See page 
19.

Check valve ball (541) is wedged 
into seat (233), due to overpressur-
ization.

Follow Pressure Relief Proce-
dure, page 10. Disassemble ball 
check assembly and inspect for 
damage, see page 19.

Dispensing valve clogged.

Relieve pressure and clear valve.

Leak detector has activated a shut- 
down solenoid

Investigate failure and reset leak 
detector

Pump operates erratically.

Clogged suction line.

Inspect; clear.

Sticky or leaking balls (541).

Clean or replace. See page 19.

Diaphragm ruptured.

Replace. See page 21.

Restricted exhaust.

Remove restriction.

Air bubbles in fluid.

Suction line is loose.

Tighten.

Diaphragm ruptured.

Replace. See page 21.

Loose inlet manifold, damaged seal 
between manifold and seat, dam-
aged gaskets.

Tighten manifold clamps or replace 
seats or gaskets. See page 19.