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Maintenance
1. Troubleshooting
Turn off power on sensing danger and check the follow-
ing. In case trouble can not be solved, contact us or your
nearest distributor.
Phenomenon
Causes
P
um
p d
oe
s n
ot r
un
.
P
um
p s
to
ps
run
ni
ng
.
Po
or a
ir fl
ow o
r d
isc
ha
rg
e p
re
ss
ur
e
P
um
p m
ak
es
nois
e.
Measures
No power distribution
Check wiring.
Motor trouble (disconnection)
Replace the pump.
Wrong tubing or poor connection
Check and fix tubing.
Pump head mounting screws are loose.
Tighten the screws.
Diaphragm insertion is loose.
Tighten diaphragm.
Diaphragm is damaged.
Replace diaphragm.*
Filter is clogged.
Remove foreign matters.
Valves are worn.
Replace valves.*
Front cover fixing screws are loose.
Secure them.
Eccentric shaft has worn.
Replace the pump.
Connecting rod bearing has worn.
Replace the pump.
Motor bearing has worn.
Replace the pump.
Voltage reduction
Increase voltage to the rated level.
Higher suction pressure than atmospheric
Reduce suction pressure.
Contact us for the measures marked with *.
2. Maintenance & Inspection
Handling of the pump, maintenance and inspection
should be carried out within the descriptions of this
instruction manual.
We are not responsible for personal injury or property
damage due to nonobservance of this warning. Contact
us or your nearest distributor as necessary.
■ Daily inspection
Pay attention to the following items during operation. Stop
operation on sensing danger and solve problems on the
Troubleshooting section. If pump performance has remarkably
reduced, replace wear parts.
No.
Check that...
Measure
1
pump operation is normal.
•
Apply correct voltage and
amperage.
•
Adjust discharge/suction
pressure.
2
there is no noise or vibra-
tion problem.
•
Unusual noise/vibration
may occur when pump
operation is not normal.
3
there is no air leak or air
ingress from pump parts
and tubing connections.
•
Retighten connections.
