TROUBLE
POSSIBLE CAUSE
PROBABLE REMEDY
PUMP FAILS TO
START
MR−03955
JS SERIES PUMPS
FM
APPROVED
TROUBLESHOOTING
PAGE B − 1
TROUBLESHOOTING − SECTION B
Review all SAFETY information in Section A.
The following precautions should be
taken before attempting to service the
pump; otherwise, injury or death could
result.
1. Familiarize yourself with this man-
ual and with all other literature
shipped with the pump.
2. Lock out incoming power to the
pump or control box to ensure that
the pump will remain inoperative.
3. Allow the pump to completely cool
if overheated.
4. Check the temperature before
opening any covers, plates or
plugs.
4. Close the discharge valve (if
used).
NOTE
Many of the probable remedies listed below re-
quire use of electrical test instruments; for specific
procedures, see
ELECTRICAL TESTING
following
the chart.
No power to motor.
Check for blown fuse or open
circuit breaker.
Impeller jammed.
Check Impeller; disassemble and
repair as necessary.
Motor, voltage or control box incompat-
Check ratings on pump nameplate
ible; defective connections.
and control box; check incoming
voltage; check connections.
Motor cable damaged.
Check (see
Electrical Testing
).
Control box current interrupting or
Check control box; check for leaking
moisture-sensing devices tripped.
shaft seals, cut O-rings, or moisture
wicking through cable.
Open circuit in motor windings or cable. Check continuity (see
Electrical
Testing
).
Motor overheated, thermal switches
Allow motor to cool.
tripped.
