Operation . Troubleshooting - Master PLUMBER 176950 Owner's Manual

Operation . Troubleshooting

Operation
Risk of electric shock. Can shock, burn or
kill. Do not handle a pump or pump motor with wet hands
or when standing on wet or damp surface, or in water.
1. Shaft seal depends on water for lubrication. Do not
operate pump unless it is submerged in water as seal
may be damaged if allowed to run dry.
2. Motor is equipped with automatic reset thermal
protector. If temperature in motor should rise unduly,
switch will cut off all power before damage can be
done to motor. When motor has cooled sufficiently,
switch will reset automatically and restart motor. If
protector trips repeatedly, pump should be removed
and checked as to cause of difficulty. Low voltage,
Troubleshooting
Symptom Possible Cause(s)
Pump is not plugged in
Blown fuse.
Low line voltage
Pump won't start
or run. Defective motor.
Defective float switch
Impeller
Float obstructed
Backflow of water from piping
Pump starts and
stops too often.
Faulty float switch
Defective float switch
Restricted discharge (obstacle
or ice in piping)
Pump won't shut
off
Float obstructed
Restricted intake screen
Low line voltage
Something caught in impeller
Worn or defective parts or
plugged impeller
Pump operates
but delivers little
or no water
Check valve installed without
vent hole.
Restricted intake screen
Check valve is installed either
backward or upside down
For parts or assistance, call Master Plumber Pump Customer Service at 800-628-9439
long extension cords, clogged impeller, very low head
or lift, or a plugged or frozen discharge pipe, etc.,
could cause protector to trip.
3. Pump will not remove all water. If operating a pump
manually, and suddenly no water comes out of the
discharge hose, shut off the unit immediately. The
water level is probably very low and the unit has
broken prime.
Risk of electric shock. Can shock, burn
or kill. Before attempting to check why unit has stopped
operating, disconnect power from unit.
Corrective Action
Check and see if pump is plugged into a proper outlet.
If blown, replace with fuse of proper size.
If voltage under recommended minimum, check size
of wiring from main switch on property. If OK, contact
power company or hydro authority.
Replace pump.
Replace float switch.
If impeller won't turn, remove lower pump body and
locate source of binding.
Remove obstruction.
Install or replace check-valve.
Replace float switch.
Replace float switch.
Remove pump and clean pump and piping.
Remove obstructed.
Remove the pump and clean the intake screen and the
impeller.
If voltage under recommended minimum, check size
of wiring from main switch on property. If OK, contact
power company or hydro authority.
Remove the pump and clean out the impeller.
Clean impeller if plugged; otherwise replace pump.
Drill a 1/16" - 1/8" (1.6mm-3.2mm) dia. hole between pump
discharge & check valve (1-2" above where the discharge
pipe screws into the pump discharge and below the
waterline).
Remove the pump and clean out the intake screen.
Be sure check valve is installed correctly.
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