Troubleshooting Guide - Zenit UNIQA Manual De Primera Instalación

First installation manual – Translation of original instructions

6. TROUBLESHOOTING GUIDE

Problem
1
The pump doesn't start
2
EN
The thermal protection trips
after a short operating time
3
Tripped circuit breaker
4
Tripped residual current device
(RCD)
5
The pump operates but the flow
is low or null
6
Starts per hour exceed the
permitted number
7
Noisy operation and excessive
vibrations
8
The pump works correctly but
absorbed current is too high
9
Leakage detection
42
Possible cause
No power supply
Damaged or disconnected cable
Fuses blowed
Tripped circuit breaker
Tripped thermal protector
Damaged or wrongly connected capa-
citor (single phase motor)
Tripped level control
Broken, burned or disconnected wiring
The pump is immersed in a liquid
which is too hot
Clogged hydraulic
Blocked rotor
Uncorrect voltage
Fault in bearings
Starts per hour exceed the permitted
number
Fault in cooling system (DRY version
only)
High drop voltage
Low voltage supply
Clogged hydraulic
Blocked rotor
Short circuit in the motor winding
Wrong electrical connection
Low setting of the thermal relay
Low motor winding insulation
Fault in cable
Clogged hydraulic
Clogged outlet pipe
Blocked non-return valve
Outlet valve blocked or closed
Wrong direction of rotation
Leakage in the pipeline
Wrong pump selection
Wrong setting of the level control
Level control malfunction
Turbolence near the level sensors
Undersized tank
Fault in bearings
Damaged impeller
Blocked impeller
Wrong direction of rotation of the
impeller
Wrong duty point
Wrong voltage supply
Clogged hydraulic
Fault in bearings
Wrong direction of rotation of the
impeller
Water ingress in the motor due to da-
maged cables, o-rings or cable glands.
Water ingress in the mechanical seal
chamber due to wearing or breaking
down of mechanical seals or o-rings
Solution
Check power supply line.
Check the cable connections and make sure that it's not damaged.
Check fuses type and rating and replace them with correct ones.
Refer to Point 3.
Refer to Point 2.
Replace the capacitor and check that it's correctly connected.
Check that the level sensor is correctly connected and functioning
Check the status of wiring and connections.
Cool down the liquid.
Clean the hydraulic parts and remove the blocking material
Contact an authorised service center.
Check that the supplied voltage matches with the one on the pump's
nameplate
Contact an authorised service center.
Refer to Point 6
Contact an authorised service center.
Reestablish the correct voltage supply.
Measure the voltage supply. Reestablish the correct voltage supply.
Clean the hydraulic parts and remove the blocking material
Contact an authorised service center.
Contact an authorised service center.
Check and correct the electrical installation.
Set the relay in accordance with the rated current on the nameplate
Contact an authorised service center.
Have the cable checked and repaired by a qualified electrician.
Clean the hydraulic parts and remove the blocking material
Clean the outlet pipe.
Clean the non-return valve.
Open and/or clean the outlet valve.
Check the direction of rotation, interchange any two of the phases.
Check the pipeline and fix the leakage causes.
Replace the pump with a suitable one.
Correct the level control setting.
check the level sensors functionality.
Remove the causes of turbulence or change the positioning of the
level sensors.
Adjust the tank dimension.
Contact an authorised service center.
Contact an authorised service center.
Clean the hydraulic parts and remove the blocking material
Check the direction of rotation, interchange any two of the phases.
Make sure the pump operates within its operative range
Reestablish the correct voltage supply.
Clean the hydraulic parts and remove the blocking material
Contact an authorised service center.
Check the direction of rotation, interchange any two of the phases.
Contact an authorised service center.
Contact an authorised service center.
better together