Sears 390.2518 - Manual (Page 12)

TROUBLESHOOTING CHART
PROBLEM 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 arc loose,
disconnected, or wired incorrectly.
5. Pressure switch contacts are dirty.
1. Be sure switch is on.
2. Replace fuse.
3. Replace starting switch.
4. Refer to instructions on wiring.
Check and tighten all wiring.
5. 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.
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 aU connections on suction Une, air volume
control, and jet.
c. Replace foot valve.
2. In installation already in use:
a. Check all connections on suction line, air volume
control, 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. Heat pit or
pump house.
6. Raise foot valve and/or strainer above well bottom.
Pump does not
deliver water to fuU
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, otherwise 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. Water level in well is lower than
estimated.
5. Motor is wired incorrectiy.
1. Adjust or replace pressure switch.
2. Close faucets-
3. Clean jet or impeller.
4. Check for possibility of using a deep well jet pump,
5. Refer to instructions on wiring.
Pump cycles too
frequently. 1. Standard pressure tank is water­
logged and has no air cushion.
2. Pipes leak.
3. Faucets or valves are open.
4. Foot valve leaks.
5. Pressure switch is out of adjustment,
6. Air charge too low in Captive Air®
Tank. Model 390,2514
and Model 390.2518 require
40 pounds for proper operation.
1. Drain tank to air volume control tapping. Check air
volume control for defects. Check for air leaks at any
connection.
2. Check connections.
3. Close faucets or valves.
4. Replace foot valve.
5. Adjust or replace pressure switch.
6. 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 air pressure is lower, pump air into tank from
outside source, until proper air pressure is reached.
Check air valve 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, aU air will be ejected.
2. Check suction piping.
3. Change installation as described in manual.
4. Lower foot valve if possible, otherwise restrict discharge
side of pump.
Leaks at the metal
clamps.
A WARNING
Release all pressure in system
before working on clamp.
1. Loose clamps or O-Ring
not sealed.
1. Release all s^'stem pressure before working on clamp.
2. Check that clamp is tight.
3. Tap around clamp with hammer on a wooden block.
Retighten clamp screw.
4. Check O-Ring for proper seating and/or dirt on
O-Ring or scat.
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