Life Of Bearings; Operation Problems - FPZ SCL R20-MD MOR IE2 Instructions

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14.4 LIFE OF BEARINGS

In normal operating conditions (values given in the "SPECIFICATIONS") it is advisable to have all the machine's bearings replaced by
FPZ personnel after 25000 hours or 3 years, whichever comes first.
NOTE FOR THE The unit's bearings can be replaced only if all the instructions, parts list, and the section/exploded view of the
USER respective unit are available.

14.5 OPERATION PROBLEMS

Problem
F
The unit does not
start F
G
G
Insufficient or no air
G
flow
G
Insufficient or no
F
differential pressure
G
F
F
Current absorption
higher than the
G
permissible value
G
G
G
G
High delivery air
G
temperature
G
G
F
Abnormal noise
G
G
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Divided as follows: F for functional fault and G for serious fault
FPZ-MI-R-MD-MOR-GOR-IE2-15-R03
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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.
Cure
Have the electrical connection checked by the
Technician, referring to the diagram in the terminal box.
Check the power supply voltage. Tolerance of fixed
voltage value ± 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,
inverting the two power supply wires and leaving the earth
connection unchanged.
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.
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