5
SYMPTOMS SOLUTIONS
5. Slide motor housing up far enough to expose the capacitors
and to be able to lay the housing down.
6. Disconnect wiring from capacitor and loosen capacitor
clamp and slide capacitor out. Replace with new
capacitor, tighten clamp and reconnect per wiring diagram
given in this manual.
7. Check all wiring connectors to be sure they are secure.
8. Be sure tetraseal gasket is in place.
9. Slide motor housing back onto pump while pulling the cord
out slowly. Assemble motor housing with four bolts.
10. Reassemble cord nut. Be sure washers are
seated and cord is pulled up against the washers.
Tighten nut securely.
11. Put pump upright and refill motor with Delta submersible
pump oil. DO NOT OVERFILL WITH OIL. See figure 1
(page 2) for oil level. Reassemble washer, gasket, nut
(item 15C) in motor housing. Retighten nut firmly,
but do not overtighten.
12. Be sure pump turns freely before connecting power. Turn
pump on side and turn impeller, using screwdriver in
slotted shaft. Plug pump into receptacle to test operation.
Pump must run quiet and free of vibration.
TO REPLACE MOTOR STATOR AND SHELL
n CAUTION! DISCONNECT ALL POWER AND
CONTROL WIRES TO MOTOR AT CONTROL PANEL
BEFORE STARTING DISASSEMBLY OPERATIONS.
NEVER RELY ON OPENING CIRCUIT BREAKER ONLY.
1. Remove motor housing as described above.
2. Disconnect all leads from power and ground wire
and set pump upright.
3. Loosen four long screws holding motor and remove slowly.
4. Either remove previous capacitors and clamps from old
motor and assemble onto new stator and shell or replace
with new capacitors and assemble per wiring diagram.
5. Position bearing spring washer on top of
upper ball bearing.
6. Position the “stator with shell” into place and line up
screws with bosses and tighten the 4 long screws.
Lay unit down in line with motor housing.
7. Be sure pump turns freely with screwdriver in
impeller end of shaft.
8. Reconnect all terminals securely per wiring diagram.
9. Be sure tetraseal gasket is in place.
10. Reassemble motor housing and fill with oil as noted above
in “Capacitor Replacement”.
WIRING DIAGRAM
RUN
CAPACITOR
START
CAPACITOR
20 µF
370 V
324 µF - 389 µF
125 V
BROWN
BLACK
PHASE
MAIN
ORANGE
YELLOW
BLUE
RED
LINE
LINE
WHITE
PROTECTOR
SENSATA TECHNOLOGIES TYPE 15HM2412
2
3
5
1
4
6
Pump does not run or hum.
See A, B, C, D, E or F.
Pump runs but does not deliver water.
See G, H, I, J, K or L.
Pump runs and pumps out sump but
does not stop.
See M.
Pump runs but delivers only small amount
of water.
See I, J, K, L or N.
Fuse blows or circuit breaker trips when
pump starts.
See K, L, N, O or P.
Motor runs for short time then stops.
Then after short period starts again.
Indicates tripping overload caused by
symptom shown.
See K, L, N or P.
For any other symptoms call
Delta Service Dealer.
A. Line circuit breaker may be off; or
fuse, if used, may be blown or loose.
B. Water level in sump may be too low.
Run in more water.
C. Pump cord plug may not be making
contact in receptacle.
D. If pump is using the series cord plug,
the two plugs may not be plugged
tight together.
E. Float may be stuck. Be sure float
operates freely in basin. Check tether
length of switch per instructions.
F. If all symptoms check OK, motor
winding may be open; take to service
center for check.
G. Check valve may be installed
backward. Arrow on valve points in
direction of flow.
H. Discharge shut-off valve, if used, may
be closed.
I. Pump may be air locked. Start and
stop several times by plugging and
unplugging cord. Check vent hole on
pump case for plugging.
J. Pump head may be too high.
Pump cannot deliver water over
100 ft. vertical. Horizontal distance
does not affect pumping, except
loss due to friction.
K. Inlet holes in pump base may be
clogged. Remove pump and clean
out openings.
L. Impeller or volute openings may be
plugged or partially plugged. Remove
pump and clean per maintenance
instructions. Check tether length of
switch per instructions.
M. Float is stuck in up position. Be sure
float operates freely in basin.
N. Pump impeller may be partially
clogged causing motor to run slow,
resulting in motor overload.
O. Fuse size or circuit breaker is too
small. Must be 20 amps.
P. Defective motor stator. Return to
Delta service center.
Hazardous voltage
can shock, burn or
cause death
TROUBLESHOOTING
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