FPZ SCL K07R MD-MOR Instructions page 41

2
4
14.5 LIFE OF BEARINGS
•
In normal operating conditions (values given in the SPECIFICATIONS) the machine's bearings must be replaced by FPZ personnel
after 20000 hours or 3 years, whichever comes first.
The unit's bearings must only be replaced:
ATTENTION
if all the instructions, parts list, and the section/exploded view of the respective unit are available.
14.6 OPERATION PROBLEMS
Problem
F
The unit does not
start
F
G
G
Insufficient or no air G
flow
G
F
Insufficient or no
differential pressure
G
F
F
Current absorption
higher than the
G
permissible value
G
G
6
Divided as follows: F for functional fault and G for serious fault
2
5
Cause
Incorrect electrical wiring.
Unsuitable supply voltage.
The impeller is stuck.
The suction filter is clogged.
Wrong frequency (for inverter powered units).
Profile of impeller blades modified (due to
deposits on the profile).
Wrong rotation direction.
Leak in the system
Incorrect electrical wiring.
Supply voltage drop.
The suction filter is clogged.
The unit has accumulated deposits inside.
The unit is operating at a pressure and/or
vacuum higher than the permissible value.
3
6
Cure
Have the electrical connection checked by the
Technician, referring to the diagram in the terminal box.
Make sure the supply voltage, measured at the motor
terminals, matches the rated voltage +/-10%.
Have the unit repaired by FPZ After-Sales Service.
Have the cartridge cleaned or replaced by the Technician.
Correct the frequency.
Have the impeller checked by FPZ After-Sales Service
Have the rotation direction reversed by the Technician,
switching around the two power supply wires.
Find the leak and seal it.
Have the electrical connection checked by the
Technician, referring to the diagram in the terminal box.
Have the supply voltage at the terminals restored within
the permissible values by the Technician.
Have the cartridge cleaned or replaced by the Technician.
Have the unit cleaned inside by FPZ After-Sales Service.
Operate on the system and/or control valve to decrease
the pressure differentials.
41 / 113