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IN0021 Rev11 Dec 2020
PROBLEM SOLVING GUIDE
SYMPTOM I - PUMP WILL NOT PRIME
PROBABLE CAUSES AND RECOMMENDED ACTION:
a. Suction Air Leak
Check that liquid is available to suction line, suction hose/pipe and
connections are in good order, no air leaks. Check strainer basket is clean
and unobstructed, ‘O’ ring gasket is in good condition, replace and tighten
cover lid. Remove and inspect pump seal, replace if suspect.
b. No Liquid in Pump
Make sure pump tank is primed if new or full of liquid if used before.
c. Closed Valves or Blocked Lines
Open all valves between pump and liquid to be transferred. Clean pump
strainer basket, open and check for clogging blockage.
SYMPTOM II - MOTOR DOES NOT TURN
PROBABLE CAUSES AND RECOMMENDED ACTION:
a.
No Power to Motor
Check all power switches are on, check that fuse or circuit breaker is
correctly set, check motor wiring at terminals.
b.
Pump Jammed
With power off, turn shaft, it should spin freely. If not, an Electrician should
investigate.
SYMPTOM III - LOW FLOW
PROBABLE CAUSES AND RECOMMENDED ACTION:
Clogged strainer basket. (See SYMPTOM I).
Suction air leak. (See SYMPTOM I).
Closed valves or blocked lines. (See SYMPTOM I).
SYMPTOM IV - MOTOR RUNS HOT
These motors will run hot to the touch. Thermal overload protection will function to turn
off if there is an overload or high temperature problem. Excessive heat can be caused
by the following:
PROBABLE CAUSES AND RECOMMENDED ACTION:
a.
Low Voltage or Incorrect Voltage
Electrician to replace bearings in motor.
