Trouble

Cause

Remedy

When it doesn's start or start but immediately stop

a. Power Failure
b. Large Discrepancy between power source and voltage
c. Significant voltage drop
d. Motor phase malfunction
e. Electric circuit connection
f. Faulty control circuit connection
g. Blown fuse
h. Faulty magnetic switch
i. Short circuit breaker is functioning
j. Foreign matter clogging pump
k. Motor burn out

a~c. Contact electric power company and devise counter measures
d. Inspection connection and magnetic switch
e. Inspect electric circuit
f. Correct wiring
g. Replace with correct type fuse
h. Replace with correct type magnetic switch
i. Repair location of short circuit
j. Remove foreign matter
k. Repair or replace

When it works but soon stops

a, Prolonged dry operation has activated motor protector and caused pump to stop
b. High liquid temperature has activated motor protector and caused pump to stop

a, Raise stop water level

b. Lower liquid temperature

When it works but capacity is not adequate

a, Reverse Rotation
b, Significant drop in voltage
c, Operating 60HZ pump on 50HZ
d, Discharge head is high
e, Large piping loss
f, Low operating water level causes air suction
g, Leak from discharge piping
h, Clogged discharge piping
i, Foreign matter in suction
j, Foreign mater clogging pump
k, worn out impeller

a, Correct rotation
b, Contact electric power company and devise counter measures
c, Check name plate
d, Recalculate and adjust
e, Recalculate and adjust
f, Raise water level or lower pump
g, Inspect, repair
h, remove foreign matter
i, Remove foreign matter
j, Disassemble and remove foreign matter
k, Replace impeller