Gorman-Rupp Pumps SE2C3 115V 1P 1483930 and up - Manual (Page 19)

OM−06492 SE SERIES
TROUBLESHOOTING PAGE D − 1
TROUBLESHOOTING − SECTION D
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.
2. Lock out incoming power to the
control box or switch 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.
5. Close the discharge valve (if
used).
The electrical power used to operate
this pump is high enough to cause inju-
ry or death. Obtain the services of a qu-
alified electrician to troubleshoot, test
and/or service the electrical compo-
nents of this pump.
NOTE
Many of the probable remedies listed below re-
quire use of electrical test instruments; for specific
procedures, see ELECTRICAL TESTING following
the chart.
Table 1. Trouble Shooting Chart
TROUBLE POSSIBLE CAUSE PROBABLE REMEDY
PUMP FAILS TO START,
OVERLOAD UNIT NOT
TRIPPED
(MANUAL MODE) Power source incompatible with
pump motor.
No voltage at line side of power cable
connection.
Open circuit in motor windings or
power cable.
Defective motor.
Correct power source.
Check power source for blown fuse,
open breaker, broken lead, or loose
connection.
Check continuity.
Check for and replace defective unit.
OVERLOAD UNIT TRIPS Low or high voltage, or excessive
voltage drop between pump and
control box.
Defective insulation in motor wind-
ings or power cable; defective wind-
ings.
Impeller jammed due to debris or
insufficient clearance.
Bearing(s) frozen.
Measure voltage at control box.
Check that wiring is correct type,
size, and length. (See Field Wiring
Connections, Section B).
Check insulation resistance; check
continuity.
Disassemble pump and check im-
peller.
Disassemble pump and check
bearing(s).