67
TROUBLESHOOTING
Trouble
Cause
Vacuum
pr
essur
e def
ecti
ve
Ai
r leaki
ng
Wa
te
r su
ction
fa
ilu
re
Insufficie
nt
,w
ater
di
schar
ge
Floodlight
, Ga
ug
e lam
p, d
o n
ot wor
k
Action
C
aused
by suc
tio
n
C
aused
by P
um
p u
nit
C
aused
by Pl
aypi
pe
C
aused
by Engi
ne u
nit
Pum
p
Drain valve(s) are
not closed
●
● ●
Close
securely.
Suction port strainer
clogged with dead
leaf or waste etc.
● ●
Clean
out.
Discharge valve
imperfect open
●
Open
securely.
Gauge pipe
connector loose or
gasket defective
●
●
●
Tighten securely.
Replace a gasket if
necessary.
Pump cover bolts
loose
●
● ●
●
Tighten
securely.
Pump cover O-ring
degradation
●
●
Clean
out
or
replace.
Impeller or Guide
vane caught a stone
or damaged
●
Clean or replace.
Mechanical seal
damaged
●
●
Replace.
15
１
１
２
２
３
３
４
４
５
５
６
６
７
７
８
８
９
９
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