Troubleshooting Guide - Craftsman 390.2521 Owner's Manual

TROUBLESHOOTING GUIDE
TROUBLE POSSIBLE CAUSES REMEDIES
Motor will not run 1. Disconnect switch is off 1. Be sure switch is on
2. Fuse is blown 2. Replace fuse
3. Starting switch is defective 3. Replace starting switch
4. Wires at motor are loose, 4. Refer to instructions on wiring
disconnected, or wired incorrectly
*5. Motor is wired incorrectry 5. Refer to instructions on wiring
6. Pressure switch contacts are dirty 6. Clean by sliding piece of plain paper between contacts
Motor runs hot and "1. Motor is wired incorrectly 1. Refer to instructions on wiring
overload kicks off 2. Voltage is too low 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 1. In new installation:
water is delivered
(*Note: Check
prime before book-
ing for other
causes. Unscrew
priming plug and
see if there is water
in priming hole)
Pump does not
deliver water to full
capacity (also check
point 3 immediately
above)
Pump pumps water
but does not shut off
Pump cycles too
frequently
3. Pump cycles too frequently
"1. Pump in a new instarlation did
not pick up prime through:
a. Improper pdming
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. 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. 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. 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
Air spurts from 1. Pump is picking up prime
faucets 2. Leak in suction side of pump
3. Well is gaseous
4. Intermittent over-pumping of well
Leaks at the metal 1. Loose clamps or "O" ring
clamp not sealed
I_,WARNING_
Release arl pressure
in system before
working on clamp!
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 sea
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. Heat pit or
pump house
6. Raise foot valve and/or strainer above well bottom
1. A deep well jet pump may be needed (over 20 ft. to water
2. Replace with Plastic Pipe where possible, otherwise with
new steel pipe
3. Use larger offset piping
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
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 valve for Feaks,using soapy
solution, and replace core if necessary
1. As soon as pump picks up prime, all air will be ejected
2. Check suction piping, make sure joints are not sucking aim
3. Change installation as described in manual
4. Lower foot valve if possible, otherwise restrict discharge
side of pump
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 clamp and retighten the clamp screw, rf leak
continues, disassemble clamp and pump halves and
check to see that "O" ring is properly seated and no
foreign material is on "O" ring or "O" seat.
Reassemble pump.
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