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Motor does not
start or makes no
sound
The pump delivers
no water
The pump does not
stop
The flow rate is too
low
The pump stops
running
1. Make sure the motor is
powered
2. The pump is disabled by
the float
1. The suction grid or piping
are clogged.
2. The impeller is worn or
stuck.
3. The head height exceeds
the pump specification.
4. Water level under the
suction minimum.
1. Make sure the suction
grid is not partially
clogged.
2. Make sure the impeller or
delivery pipe are not
partially clogged or fouled.
3. Flow direction control
valve orientation incorrect.
1. Intervention of the thermal
overload switch.
1. The pump is not disabled
by the float.
Service agent.
1. Make sure the float can move
freely.
2. Increase depth of the water.
1. Remove the obstruction.
2. Replace the impeller or remove the
obstruction.
3. Reduce head height.
4. Insert into water or dig well to
move pump lower.
1. Make sure the float can move
easily.
2. Float disabled (locked).
1. Remove any obstructions.
2. Remove any obstructions.
3. Check and replace if necessary.
1. Make sure the fluid being pumped
is not too dense, causing the motor
to overheat.
2. Make sure the temperature of the
water is not too high.
3. Make sure there is no solid body
obstructing the impeller.
4. Power supply doesn’t comply with
the nameplate’s data.
12.1 TROUBLESHOOTING CHECKLIST
WARNING:
For your own safety, always turn the main switch on the machine "Off" and remove the plug from
the power supply before carrying out any servicing or maintenance.
12. TROUBLESHOOTING
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