JSV3H
OM−05229
PAGE D − 1
TROUBLESHOOTING
TROUBLESHOOTING − SECTION D
Review all SAFETY information in Section A.
NOTE
Many of the probable remedies listed in the TROU-
BLESHOOTING CHART require use of electrical
test instruments; for specific procedures, see
ELECTRICAL TESTING at the end of the chart.
TROUBLESHOOTING CHART
TROUBLE
POSSIBLE CAUSE
PROBABLE REMEDY
IMPELLER JAMMED.
CHECK IMPELLER; DISASSEMBLE
AND REPAIR AS NECESSARY.
MOTOR, VOLTAGE OR CONTROL
CHECK RATINGS ON PUMP NAMEPLATE
BOX INCOMPATIBLE; DEFECTIVE
AND CONTROL BOX; CHECK INCOMING
CONNECTIONS
VOLTAGE; CHECK CONNECTIONS.
MOTOR CABLE DAMAGED
CHECK PER
ELECTRICAL TESTING
.
CONTROL BOX CURRENT INTER-
RUPTING OR MOISTURE−SENSING
DEVICES TRIPPED.
CHECK CONTROL BOX; CHECK FOR
LEAKING SHAFT SEALS, CUT O−RINGS,
OR MOISTURE WICKING THROUGH
OR CABLE.
CHECK CONTINUITY PER
ELECTRICAL
TESTING
.
MOTOR OVERHEATED, THERMAL
SWITCHES TRIPPED.
ALLOW MOTOR TO COOL.
VOLTAGE TOO LOW OR TOO HIGH;
CHECK INCOMING VOLTAGE; CHECK
WIRING SIZE, TYPE AND LENGTH. (SEE
INSTALLATION − SECTION B
.
EXCESSIVE VOLTAGE DROP BE−
TWEEN PUMP AND CONTROL BOX.
MOTOR RUNS
BUT DOES
NOT DELIVER
RATED DIS-
CHARGE.
PUMP FAILS TO
START.
DISCHARGE HEAD TOO HIGH.
REDUCE DISCHARGE HEAD, OR INSTALL
STAGING ADAPTER AND ADDITIONAL
PUMP.
DISCHARGE THROTTLING VALVE
OPEN DISCHARGE VALVE FULLY; CHECK
PARTIALLY CLOSED; CHECK VALVE
PIPING INSTALLATION.
IMPROPERLY INSTALLED.
OPEN CIRCUIT IN MOTOR WINDINGS
(CONT.)
NO POWER TO MOTOR.
CHECK FOR BLOWN FUSE OR OPEN
CIRCUIT BREAKER
CABLE.
PUMP RUNNING BACKWARD.
CHECK IMPELLER ROTATION
(SEE
SECTION C
).
IMPELLER OR DISCHARGE LINE
CLOGGED.
CLEAR