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11.1 DIAPHRAGM PUMP - TROUBLESHOOTING
11. TROUBLESHOOTING
PROBLEM
CAUSE
SOLUTION
PUMP DOES NOT
WORK, IT STOPS OR
DOES NOT RESTART
The compressed air does not reach the
pump air inlet.
Connect the compressed air.
The air pressure is too low to start the
pump.
Set air pressure of at least 2 bar.
The exhaust valve (A pg. 21) is in dischar-
ging position.
Turn the valve in the right position.
The air regulator is closed.
Open the air regulator.
The paint regulator is closed.
Open the paint regulator.
The silencer (27 pg. 29) is clogged.
Replace the silencer.
The following parts are clogged due to solidified paint inside them.
The suction hose filter is clogged.
Clean and replace the filter.
Every pump fluid passage.
Remove the clogging material.
Every paint regulator fluid passage.
Remove the clogging material.
The pump does not run.
Disassemble the pump and check the
following parts which
will be replaced if
damaged:
PTFE diaphragm. [#]
Rubber diaphragm. [#]
“Y” packings. [#]
O ring. [#]
Rod (any strange deformation,scratches or
burrs). [#]
Self-lubricating bushings. [#]
Main casing inside diameters (Ø 10)
damaged (scratched or with burrs).
Replace Air Operating Valve.
PUMP WORKS BUT
THE PAINT DOES NOT
COME OUT
The following parts are unscrewed or damaged.
The pump suction connector with the suc-
tion pipe
Check if some tightening are loosened and
tighten them.
The suction connector
Put some adhesive and tighten.
The lower adaptor
Tighten.
The dip tube suction pipe
If the suction pipe is damaged (it sucks air),
replace it.
IMPORTANT
Spare parts marked by [#] must be ANEST IWATA original items.
If not, it can cause failure.
