57
Safety, Installation and Operations Manual – Translation of original instructions
Problem
1
The pump doesn’t start
No power supply Check power supply line
Damaged or disconnected cable Check the cable connections and make sure that it’s not damaged
Fuses blowed Check fuses type and rating and replace them with correct ones
Tripped circuit breaker Refer to Point 3
Tripped thermal protector Refer to Point 2
Damaged or wrongly connected capa-
citor (single phase motor)
Replace the capacitor and check that it’s correctly connected
Tripped level control Check that the level sensor is correctly connected and functioning
Broken, burned or disconnected wiring Check the status of wiring and connections
2
The thermal protection trips
after a short operating time
The pump is immersed in a liquid
which is too hot
Cool down the liquid
Clogged hydraulic Clean the hydraulic parts and remove the blocking material
Blocked rotor Contact an authorised service center
Uncorrect voltage
Check that the supplied voltage matches with the one on the pump’s
nameplate
Fault in bearings Contact an authorised service center
Starts per hour exceed the permitted
number
Refer to Point 6
Fault in cooling system (DRY version
only)
Contact an authorised service center
3
Tripped circuit breaker
High drop voltage Reestablish the correct voltage supply
Low voltage supply Measure the voltage supply. Reestablish the correct voltage supply
Clogged hydraulic Clean the hydraulic parts and remove the blocking material
Blocked rotor Contact an authorised service center
Short circuit in the motor winding Contact an authorised service center
Wrong electrical connection Check and correct the electrical installation
Low setting of the thermal relay Set the relay in accordance with the rated current on the nameplate
4
Tripped residual current device
(RCD)
Low motor winding insulation Contact an authorised service center
Fault in cable Have the cable checked and repaired by a qualified electrician
5
The pump operates but the flow
is low or null
Clogged hydraulic Clean the hydraulic parts and remove the blocking material
Clogged outlet pipe Clean the outlet pipe
Blocked non-return valve Clean the non-return valve
Outlet valve blocked or closed Open and/or clean the outlet valve
Wrong direction of rotation Check the direction of rotation, interchange any two of the phases
Leakage in the pipeline Check the pipeline and fix the leakage causes
Wrong pump selection Replace the pump with a suitable one
6
Starts per hour exceed the
permitted number
Wrong setting of the level control Correct the level control setting
Level control malfunction check the level sensors functionality
Turbolence near the level sensors
Remove the causes of turbulence or change the positioning of the
level sensors
Undersized tank Adjust the tank dimension
7
Noisy operation and excessive
vibrations
Fault in bearings Contact an authorised service center
Damaged impeller Contact an authorised service center
Blocked impeller Clean the hydraulic parts and remove the blocking material
Wrong direction of rotation of the
impeller
Check the direction of rotation, interchange any two of the phases
8
The pump works correctly but
absorbed current is too high
Wrong duty point Make sure the pump operates within its operative range
Wrong voltage supply Reestablish the correct voltage supply
Clogged hydraulic Clean the hydraulic parts and remove the blocking material
Fault in bearings Contact an authorised service center
Wrong direction of rotation of the
impeller
Check the direction of rotation, interchange any two of the phases
9
Leakage detection
Water ingress in the motor due to da-
maged cables, o-rings or cable glands.
Contact an authorised service center
Water ingress in the mechanical seal
chamber due to wearing or breaking
down of mechanical seals or o-rings
Contact an authorised service center
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