6. Trouble shooting
IOM manual
–
SG series
27
6.
Trouble shooting
DANGER:
Personal injury hazard. Troubleshooting a live control panel exposes personnel to hazardous
voltages. Electrical troubleshooting must be done by a qualified electrician. Failure to follow
these instructions will result in serious personal injury, death, and/or property damage.
WARNING:
Always disconnect and lock out power before servicing to prevent unexpected startup. Failure
to do so could result in death or serious injury.
Read this manual carefully before requesting repair. After re-inspecting the pump, if it does not
operate normally, contact Tapflo.
Symptom
Possible cause
Countermeasure
Pump fails to start
No power is supplied (i.e. power
outage)
Contact the electric power company or an
electrical repair shop
Open circuit or poor cable connection
Check if there is an open circuit in the cable or
wiring
The impeller is blocked
Inspect the pump and remove the obstruction
Pump starts but stops
immediately causing
the motor protector
to actuate
The impeller is blocked
Inspect the pump and remove the obstruction
Voltage drop
Correct the voltage to the rated voltage or use
an extension cable that meets the standard
Circle thermal protector or protective
device failure
Replacement or adjustment
A 50 Hz model is operated at 60 Hz
Check the nameplate and replace the pump or
the impeller
The strainer is obstructed, and the
pump was operated dry for long time
Remove the obstruction
Broken motor
Repair the motor or replace with a new motor
Low head and high liquid density
Check motor power consumption
The pump is picking up too much
sediment
Place a concrete block under the pump to
prevent the pump from picking up sediment
The pump´s head
and
capacity decreased
The impeller or suction cover is worn
Replace
The hose may be kinked or clogged
Minimize the number of bends in the hose (in
an area with a large amount of debris, use the
pump in a meshed basket)
The pump submerge depth is too
shallow, the air enters the pump
Adjust the submerge depth until the pump is
submerged
The valve on discharge line is closed
Open the valve
The strainer is obstructed or buried
Remove the obstruction; place a concrete
block under the pump to prevent the pump
from picking up sediment
The motor rotates in reverse direction
Interchange the power supply terminal
connection
The pump generates
noise or vibration
The bearing of the motor may be
damaged
Replace the bearing, contact Tapflo
The shaft is bent
Contact Tapflo
