11
8. Troubleshooting
If any abnormality is found, perform check along with the following list. If the abnormality can
’t be
eliminated, return the pump to SMC.
Warning
- Exhaust dangerous fluid out of the pump before check.
- Do not return the pump with dangerous fluid left. Be sure to substitute it with DI water.
Otherwise, the fluid could cause burn and other damages on human during transportation.
Trouble
Possible cause
Remedy
1) Supply of air can
’t move
the pump.
- Internal air piping is clogged
withdust.
- Suction side (FLUID IN) or
dischargeside (FLUID OUT) is
closed or has large resistance.
- Defect inside the body.
- Insufficient supplied air
pressure.
- Intrusion of foreign materials into
pump chamber.
- Damaged diaphragm.
- Cleaning or replacement of
pilot air switching part.
- Review of piping at
suction or discharge side
and removal of restrictor.
- Replacement of pump.
- Supply of air at adequate
pressure.
- Cleaning.
- Replacement of pump.
2) The pump
starts, but
doesn
’t
discharge.
The pump
doesn
’t
suck.
- Check valve is clogged.
- Check valve is damaged or
worn.
- The filter at suction side (FLUID
IN) is clogged.
- Excessive required suction
head.
- Incorrect mounting direction.
- The diaphragm is damaged or
comes off.
- Sealing failure of fitting at
suction side (FLUID IN).
- Excessive viscosity of
transported fluid.
- Incorrect insertion of check
valve.
- Cleaning.
- Replacement of pump.
- Cleaning of filter.
- Reduction to suction head
covered by the pump.
- Remounting in normal
direction.
- Replacement of pump.
- Secure mounting of seal.
- Use of fluid with lower
viscosity.
- Remounting in correct
direction.
The pump
sucks, but
doesn
’t
discharge
- Check valve or fitting at
Discharge side (FLUID OUT) is
clogged.
- Cleaning.
