Troubleshooting - Master 123340 Owner's Manual

Operation
123340 – 1 HP
Discharge
Pressure
PSI (kPa) 5' (1.5) 10' (3)
10 (69) 55 (208) 49 (185)
15 (103) 51 (193) 46 (174)
20 (138) 45 (170) 42 (159)
25 (172) 38 (144) 35 (132)
30 (207)
31 (117) 28 (106)
35 (241) 23 (87) 19 (72)
40 (276) 17 (64) 13 (49)
45 (310)
50 (345)
All models except 123340 have discharge and suction size of 1-1/2" NPT. 123340 has 2" NPT suction and discharge.

Troubleshooting

Capacitor voltage may be hazardous. To discharge capacitor, hold insulated handle screwdriver BY THE HANDLE and short capacitor
terminals together. Do not touch metal screwdriver blade or capacitor terminals. If in doubt, consult a qualified electrician.
SYMPTOM POSSIBLE CAUSE(S)
Motor will not run Disconnect switch is off
Fuse is blown or circuit breaker tripped
Starting switch is defective
Wires at motor are loose,
disconnected, or wired incorrectly
Motor runs hot and Motor is wired incorrectly
overload kicks off or
Voltage is too low
motor does not run
and only hums
Motor runs but no Pump in new installation did
water is delivered* not pick up prime through:
1. Improper priming
2. Air leaks
3. Leaking foot valve or check valve
* (Note: Stop pump;
then check prime 4. Pipe size too small
before looking
Pump has lost prime through:
for other causes.
1. Air leaks
Unscrew priming plug 2. Water level below suction pipe inlet
and see if water is in
priming hole).
Impeller is plugged
Check valve or foot valve is stuck shut
Pipes are frozen
Foot valve and/or strainer are
buried in sand or mud
*Pump does not Water level in well is lower than
deliver water to full estimated
capacity
Steel piping (if used) is corroded or
limed, causing excess friction
Piping is too small in size
Pump not being supplied with
enough water
Pump leaks Clamp loose
around clamp
For parts or assistance, call Master Plumber Customer Service at
Performance Chart / GPM(LPM)
Height Of Pump Above Water / Feet (Meter)
15' (4.6) 20' (6.1) 5' (1.5)
48 (181) 45 (170) 67 (254)
45 (170) 44 (166) 66 (250)
39 (148) 37 (140) 61 (231)
32 (121) 29 (110) 55 (208)
24 (90) 20 (76) 48 (181)
16 (60) 11 (42) 39 (147)
8 (30) 33 (125)
18 (68)
123341 – 1-1/2 HP
10' (3) 15' (4.6) 20' (6.1)
61 (231) 56 (212) 46 (174)
58 (220) 55 (208) 45 (170)
56 (212) 54 (204) 44 (166)
52 (197) 51 (193) 43 (163)
45 (170) 44 (166) 37 (140)
37 (140) 34 (129) 28 (106)
27 (102) 20 (76) 11 (42)
14 (53) 8 (30)
CORRECTIVE ACTION
Be sure switch is on.
Replace fuse or reset circuit breaker.
DISCONNECT POWER; Replace starting switch.
Refer to instructions on wiring (Page 7). DISCONNECT POWER; check and
tighten all wiring.
Refer to instructions on wiring.
Check voltage being supplied to motor. Install heavier wiring if wire size is
too small (See Electrical / Wiring Chart).
In new installation:
1. Re-prime according to instructions.
2. Check all connections on suction line, with soapy water or
shaving cream.
3. Replace foot valve or check valve.
4. Re-pipe using size of suction and discharge ports on pump.
In installation already in use:
1. Check all connections on suction line and shaft seal with soapy water.
2. Lower suction line into water and re-prime. If receding water level
in well exceeds 25' (7.6M), a deep well pump is needed.
Clean impeller.
Replace check valve or foot valve.
Thaw pipes. Bury pipes below frost line. Heat pit or pump house.
Raise foot valve and/or strainer above bottom of water source.
Clean foot valve and strainer.
A deep well jet will be needed if your well is more than 25' (7.6M)
depth to water.
Replace with plastic pipe where possible, otherwise with new steel pipe.
Re-pipe using size of suction and discharge ports on pump.
Add additional well points.
STOP PUMP, tighten clamp nut 1-2 turns. Alternately tighten and tap on
clamp with mallet to seat O-Ring. Do not overtighten.
1-800-628-9439
123342 – 2 HP
5' (1.5) 10' (3) 15' (4.6)
69 (261) 64 (242) 65 (246)
65 (246) 62 (235) 60 (227)
59 (223) 56 (212) 54 (204)
52 (197) 50 (189) 48 (181)
47 (178) 45 (170) 42 (159)
42 (159) 38 (144) 35 (132)
34 (129) 30 (113) 27 (102)
25 (95) 18 (68) 13 (49)
14 (53) 7 (26)
9
20' (6.1)
62 (235)
57 (215)
52 (197)
46 (174)
40 (151)
32 (121)
23 (87)
10 (38)