Sears 390.2521 - Manual (Page 11)

TROUBLESHOOTING GUIDE
TROUBLE POSSIBLE CAUSES REMEDIES
Motor will not run 1. Disconnect switch is off
2. Fuse is blown
3. Starting switch is defective
4. Wires at motor are loose,
disconnected, or wired incorrectly
*5. Motor is wired incorrectly
6. pressure switch contacts are dirty
1. Be sure switch is on
2. Replace fuse
3. Replace starting switch
4. Refer to instructions on wiring
5. Refer to instructions on wiring
6. Clean by sliding piece of plain paper between contacts
Motor runs hot and
overload kicks off *1. Motor is wired incorrectly
2. Voltage is too low
3. Pump cycles too frequently
1. Refer to instructions on wiring
2. Check with power company. Install heavier wiring
if wire size is too small. See wiring instructions
3. See section below on too frequent cycling
Motor runs but no
water is delivered
{‘Note: Check
prime before look­
ing for other
causes. Unscrew
priming plug and
see if there is water
in priming hole)
*1. Pump in a new installation did
not pick up prime through:
a. Improper priming
b. Air leaks
c. Leaking foot valve
*2. Pump has lost its prime through:
a. Air leaks
b. Water level below suction of pump
3. Jet or impeller is plugged
4. Check valve or foot valve is stuck
in closed position
5. Pipes are frozen
6. Foot valve and/or strainer are
buried in sand or mud
1. In new installation:
a. Re-prime according to instructions
b. Check all connections on suction line and jet
c. Replace foot valve
2. In installation already in use:
a. Check all connections on suction line, jet and shaft seal
b. Lower suction line into water and re-prime. If receding
water level in a shallow well operation exceeds
suction lift, a deep well pump is needed
3. Clean jet or impeller according to instructions
4. Replace check valve or foot valve
5. Thaw pipes. Bury pipes below frost line. Fleat pit or
pump house
6. Raise foot valve and/or strainer above well bottom
Pump does not
deliver water to full
capacity (also check
point 3 immediately
above) 1. Water level in well is lower than
estimated
2. Steel piping (if used) is corroded or
limed, causing excess friction
3. Offset piping is too small in size
1. A deep well jet pump may be needed (over 20 ft. to water)
2. Replace with Plastic Pipe where possible, othenwise with
new steel pipe
3. Use larger offset piping
Pump pumps water
but does not shut off 1. Pressure switch is out of adjustment
or contacts are “frozen”
2. Faucets have been left open
3. Jet or impeller is clogged
4. Motor is wired incorrectly
5. Water level in well is lower than
estimated
1. Adjust or replace pressure switch
2. Close faucets
3. Clean jet or impeller
4. Refer to instructions on wiring
5. Check possibility of using a deep well jet pump
Pump cycles too
frequently
1 . Pipes leak
2. Faucets or valves are open
3. Foot valve leaks
4. Pressure switch is out of adjustment
5. Air charge too low in
Captive Air® Tank
1. Check connections, replace pipe fittings
2. Close faucets or valves
3. Replace foot valve
4. Adjust or replace pressure switch
5. Disconnect electrical power and open faucets until all
pressure is relieved. Using automobile tire pressure
gauge, check air pressure in tank at the valve stem
located at top of tank. If less than 40 pounds, pump air
into tank from outside source, until 40 pounds pressure
is reached. Check air vaive for leaks, using soapy
solution, and replace core if necessary
Air spurts from
faucets
1. Pump is picking up prime
2. Leak in suction side of pump
3. Well is gaseous
4. Intermittent over-pumping of well
1 . As soon as pump picks up prime, all air will be ejected
2. Check suction piping, make sure joints are not sucking air
3. Change installation as described in manual
4. Lower foot valve if possible, othenwise restrict discharge
side of pump
Leaks at the metal
clamp 1. Loose clamps or “0” ring
not sealed
1. First check the clamp tightening screw to see if it is tight.
If it is tight and slight leakage still occurs, place a piece
of wood on the periphery of the clamp and firmly tap the
wood with a hammer. Repeat this operation around the
edge of the damp and retighten the clamp screw. If leak
continues, disassemble clamp and pump halves and
check to see that “0” ring Is properly seated and no
foreign material is on “O” ring or “0” seat.
Reassemble pump.
A WARNING
Release all pressure
in system before
working on clamp!
11