Berkeley D125110VB Installation, Operation & Parts Manual Download Page 3

OPERATION

Risk of electric shock.

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 oper-
ate 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 automati-
cally and restart motor. If protector trips repeatedly, pump
should be removed and checked as to cause of difficulty.
Low voltage, long extension cords, clogged impeller, very
low head or lift, etc., could cause cycling.

3.

Pump will not remove all water. If manually operated
pump is operating and suddenly no water comes out dis-
charge hose, shut OFF unit immediately. Water level is
probably very low and unit has broken prime.

NOTE: 

For continuous operation, water depth must be at

least 2" (5 cm).

Risk of electric shock.

Before attempting to

check why unit has stopped operating, disconnect power
from unit. Do not handle pump with wet hands or  when
standing on wet or damp surfaces, or in water.

NOTE:

No replacement parts available.

3

SYMPTOM

PROBABLE CAUSE(S)

CORRECTIVE ACTION

Pump won’t start or run.

Blown fuse.

If blown, replace with fuse of proper size.

Low line voltage.

If voltage under recommended minimum, check size of wiring from
main switch on property. If OK, contact power company or hydro authority.

Defective motor.

Replace pump.

Defective float switch.

Replace float switch.

Impeller.

If impeller won’t turn, remove lower pump body and locate source of binding.

Float obstructed.

Remove obstruction.

Pump starts and stops

Backflow of water from piping.

Install or replace check-valve.

too often.

Faulty float switch.

Replace float switch.

Pump won’t shut off.

Defective float switch.

Replace float switch.

Restricted discharge 

Remove pump and clean pump and piping.

(obstacle in piping).

Float obstructed.

Remove obstruction.

Pump operates but

Low line voltage.

If voltage under recommended minimum, check size of wiring from main

delivers little or no water.

switch on property. If OK, contact power company or hydro authority.

Something caught in impeller.

Clean out impeller.

Worn or defective parts or

Clean impeller if plugged; otherwise replace pump.

plugged impeller.

Check valve installed without

Drill a 1/16" - 1/8" (1.6mm - 3.2mm) dia. hole between pump 

vent hole.

discharge & check valve.

TROUBLESHOOTING CHART

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