IWAKI TC-X400A M Series, Operation Manual

Page: 26 / 32

Maintenance
Troubleshooting
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Problem Probable Cause Actions to be taken
Pump runs, but fluid does not
come out
or flow decreased, or stop.
The suction lift or discharge head is too long Confirm the piping configuration and shorten the length.
Supply tank is empty or inlet valve is closed or piping is
crimped
Change or refill tank, check that inlet valves are fully
open.
Air leak on (inlet) suction side
Check that inlet hose or hose fittings are not loose or
broken and pump manifold torque values are correct.
Check the Inlet Manifold O-rings are not damaged or
missing.
The suction-side fluid piping (including the strainer) is
clogged with slurry or sludge
Check and clean the fluid piping and filters (if fitted).
The supply air pressure is low
Raise the supplied air pressure to the pump. Check the
compressor and regulator settings and check that the
configuration of the air piping is correct.
Cavitation occurs
Adjust the correlation between supply air pressure inlet
and discharge flow or pressure, or shorten the suction
lift length.
Chattering occurs (ball valves not seating properly)
Check and adjust the correlation between supplied air
pressure and inlet pressure and discharge pressure or
flow. Decrease the inlet flow rate or increase the back
pressure by slightly closing the discharge valve. Check
the ball valve material is sufficiently heavy compared to
the liquid being pumped.
Icing on air-switching portion
Check that the air filter and exhaust are clean and not
blocked or restricted. Check and adjust the air flow rate
and the correlation between the liquid flow rates. Fit a
speed control muffler. Manually remove ice from air-
switching valve before restarting.
If the slide valve does not move smoothly due to dirt
particles (foreign material contamination).
Remove the exhaust and clean it using a lubricant.
(Stop and remove the air supply before cleaning the
exhaust. Then reinstall and restart the supply the air)