11
(4) Too much abrasive comes
out the nozzle.
Metering valve too much
opened.
Check and correct adjustments if
necessary.
Choke valve not fully opened.
Check and fully open it.
(5) Pop-
up valve doesn’t remain
closed.
Not enough air volume or
pressure.
Check air pressure of the
compressor with a needle
gauge.
Close the choke valve. When
the pop-up valve does not
seal the filling port completely,
there is not enough air
volume.
(6) Pop-up valve does not close
after depressurization.
Worn pop-up valve and / or
gasket.
Replace the pop-up valve and / or
the gasket.
Blocked guide for the pop-up
valve.
Open inspection door.
Remove the pop-up valve and
clean the blast machine.
(7) Blast machine does not
depressurize when the
deadman handle is released.
Blocked outlet valve.
Clean the outlet valve.
Inlet valve RMS-1500 defective.
Check connections.
Check and repair the inlet
valve.
(8) Poor suction (abrasive is not
completely drawn into the
blast machine and escapes).
Not enough air volume or
pressure.
Check air pressure of the
compressor with a needle
gauge.
If necessary use a bigger
compressor.
Blocked moisture separator.
Check and clean.
Clogged filter cartridge.
Turn off the suction unit after a
longer period of work without
interruption (filter cartridge is
cleaned).
Check pulse pressure.
Clean filter cartridge.
