Life Of Bearings; Operation Problems - FPZ SCL TS Series Instructions Manual

7.4

LIFE OF BEARINGS

•
In normal operating conditions (values given in the SPECIFICATIONS) the machine's bearings should be replaced by FPZ
personnel after 25000 hours or 3 years, whichever comes first.
ATTENTION!
The unit's bearings must only be replaced:
if all the instructions, parts list, and the section/exploded view of the respective unit are available.
7.5

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
G
G
High delivery air
temperature G
G
G
F
G
Abnormal noise
G
F
4
Divided as follows: F for functional fault and G for serious fault
FPZ-MI-K TS-MOR-USA-15-R03
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.
The unit is operating at a pressure/vacuum
higher than the permissible value.
The suction filter is clogged.
The unit has accumulated deposits inside.
Suction and/or delivery pipes obstructed.
Intake air temperature above 40°C (+104°F).
The sound absorbing material is damaged.
The impeller rubs against the casing:
- The unit is operating at a pressure/vacuum
higher than the permissible value.
- Reduction of assembly play due to internal
deposits (dust, dirt on pipes, process
residues, etc.).
Worn bearing.
Unit installation position unsuitable.
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.
Operate on the system and/or control valve to
decrease the pressure differentials.
Have the cartridge cleaned or replaced by the
Technician.
Have the unit cleaned inside by FPZ After-Sales
Service.
Have the obstructions removed by the Technician.
Use heat exchangers to reduce the intake air
temperature.
Have the sound absorbing material replaced by the
Technician.
Operate on the system to decrease the pressure
differentials.
Have the unit cleaned inside by FPZ After-Sales
Service.
Have the bearing replaced by FPZ After-Sales
Service.
Have the units installed on structures that cannot
transmit or amplify the noise (tanks, metal plates,
etc.) by the Technician.
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