1
0
TROUBLESHOOTING
GUIDE
Read and understand safety and operating
instructions in this manual before doing any work
on pump!
Only qualified personnel should electrically test
pump motor!
FAILURE TO PUMP; REDUCED CAPACITY OR
DISCHARGE PRESSURE
Suction leaks/lost prime:
1.
Pump must be primed; make sure that pump volute
and trap are full of water. See priming instructions,
Page
7.
2.
Make sure there are no leaks in suction piping.
3.
Make sure suction pipe inlet is well below the water
level to prevent pump from sucking air.
4.
Suction lift of 10 to 20 feet (3-6 M) will reduce
performance. Suction lift of more than 20 feet (6 M)
will prevent pumping and cause pump to lose
prime. In either case, move pump closer (vertically)
to water source. Make sure suction pipe is large
enough.
Clogged pipe/trap/impeller, worn impeller:
5.
Make sure suction trap is not clogged; if it is, clean
trap and strainer.
6.
Make sure impeller is not clogged (follow steps 1
through 7 under “Removing Old Seal”, Page
9;
check impeller for clogging; follow steps 7 through
10 under “Installing New Seal”, Page
9
, for
reassembly).
7.
Impeller and diffuser may be worn. If so, order
replacement parts from Repair Parts List, Page
11-
1
3
.
8.
Pump may be trying to push too high a column of
water. If so, a “higher head” pump is needed.
Electrical:
9. Pump may be running too
slowly; check voltage at
motor terminals and at
meter while pump is
running. If low, see wiring
instructions or consult
power company. Check
for loose connections.
10. Pump may be too hot.
A. Check line voltage; if
less than 90% or more
than 110% of rated
voltage consult a
licensed electrician.
B. Increase ventilation.
C. Reduce ambient
temperature.
D. Tighten any loose connections.
MECHANICAL TROUBLES AND NOISE
1. If suction and discharge piping are not adequately
supported, pump assembly will be strained. See
“Installation”, Page 3.
2. Do not mount pump on a wooden platform! Securely
mount on concrete platform for quietest
performance.
Hazardous voltage.
Can shock, burn,
or cause death.
Disconnect power
before working
on pump or motor.
