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Maintenance
1. Trouble shooting
Upon sensing abnormality, stop operation immediately and remove
problems according to this section.
If the following measures do not help removing problems, contact
us or your nearest distributor.
Phenomenon
Causes
Th
e p
um
p d
oe
s n
ot r
un
.
P
oo
r d
is
ch
ar
ge h
ea
d
O
ve
rc
ur
re
nt
N
ois
e a
nd
vi
br
at
io
n pro
ble
m
Le
ak
ag
e
Measure
Wrong wiring
Inspect wiring. Rewire as
necessary.
Motor failure
Contact us.
Air is trapped.
Eliminate air.
Air suction from the inlet
Check suction piping.
Dry running
Prime the pump before
operation.
Too high SG or viscosity
Replace with suitable pump.
Impeller magnet hits the
rear casing.
Contact us.
Impeller is damaged.
Contact us.
Foreign matters on the
impeller.
Contact us.
O ring is damaged.
Contact us
Pump head mounting
screws are loose.
Tighten the mounting
screws.
2. Maintenance & Inspection
Handling of the pump, maintenance and inspection should be car-
ried out within this instruction manual. Do not handle the pump
beyond the descriptions in this manual.
We are not responsible for any personal injury or property damage
due to nonobservance of this warning. Contact us or your nearest
distributor as necessary.
2.1 Maintenance
■
Retightening
After a long period of operation or storage, the pump head mounting
screws may be loose. Tighten the mounting screws as necessary, but
then do not deform the plastic pump head.
Tightening torque
MD-55F
3.0N
•
m
MD-100F
3.5N
•
m
■
Use with an earth leakage breaker
When an earth leakage breaker is used and it has worked, always
solve the root cause of problems. Be sure to unplug the pump before
investigation.
