Zenit GREY Series, Инструкция по установке и эксплуатации, Страница: 41 / 136

better together
41
EN
Safety, Installation and Operations Manual - Original instructions
7. TROUBLESHOOTING GUIDE
Problem Possible cause Solution
1 The pump fails to
start or, starts but
stop immediately
No proper power is supplied (i.e. power outage, voltage
drop, etc.)
Contact a skilled electrician
Power cable is faulty or disconnected Inspect the cable and check that the connections to
power line are properly tightened
Malfunction in control system (control panel). Have the cause investigated and repaired by a skilled
electrician
Fuses blowed Check fuses type and rating and replace them with
correct ones
Tripped circuit breaker Refer to Point 2
Tripped thermal protector Refer to Point 3
Leakage detector alarm Refer to Point 4
Tripped residual current device (RCD) Refer to Point 5
Damaged or wrongly connected ca- pacitor (single
phase motor)
Contact a skilled electrician to replace the capacitor
and check that it’s correctly connected
Tripped level control Check that the level sensors are correctly connected
and functioning
2 The power supply
circuit breaker trips
Phase voltages too low or not balanced Contact a skilled electrician
Wrong electrical connection Contact a skilled electrician to check and correct the
electrical installation
Overload relay is set too low or is faulty Check the overload relay. Set the relay according with
the rated current on the dataplate
Short circuit in the motor winding Contact an authorised service center
Clogged hydraulic Clean the hydraulic parts and remove the blocking
material
Blocked rotor Contact an authorised service center
3 The thermal protec-
tion 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
Internal moving parts are damaged Contact an authorised service center
Uncorrect voltage Check that the supplied voltage matches with the one
on the pump’s dataplate
Fault in bearings Contact an authorised service center
Starts per hour exceed the permitted number Refer to Point 6
4 Tripped residual cur-
rent device (RCD)
Humidity in motor. Contact an authorised service center
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 posi-
tioning of the level sensors
Undersized tank Adjust the tank dimension