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1. Trouble shooting
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 r
un
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 n
oi
se
.
Measures
No power distribution
Check wiring.
Motor trouble (disconnection or capacitor failure)
Replace the motor.*
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.
Motor-Bracket fixing screws are loose.
Secure them.
Eccentric shaft has worn.
Replace the connecting rod.*
Connecting rod bearing has worn.
Replace the connecting rod.*
Motor bearing has worn.
Replace the motor.*
Voltage reduction
Increase voltage to the rated level.
Higher suction pressure than atmospheric
Reduce suction pressure.
Condensation in the pump head
Dry up the pump.
Contact us for the measures marked with *.
2. Maintenance & Inspection
Handling of the pump, maintenance and inspection should
be carried out within this instruction manual. Do not handle
the pump beyond the descriptions in this manual.
We are not responsible for personal injury or property dam-
age 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 trou-
ble shooting 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 vibration
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.
Maintenance
