Troubleshooting - FPZ SCL K033-MS MOR Instructions

9

TROUBLESHOOTING

Problem
The unit does not start
No or insufficient air flow
No or insufficient pressure
differential
Current absorption
exceeding the admissible
value
High delivery air
temperature
Anomalous noise
Abnormal vibrations
Leaks in the unit
The term "operator" means:
maintenance work on it.
Cause
Electrical wiring incorrect
Power supply voltage unsuitable
The impeller is stuck
The suction filter is clogged
Frequency wrong (for units powered via an
inverter)
Profile of the impeller blades modified (due to
deposits on the profile)
Incorrect rotation direction
Leaks in the plant
Electrical wiring incorrect
Drop in mains supply voltage
The suction filter is clogged
The unit has accumulated deposits inside
The unit is operating at a pressure and/or
vacuum that exceeds the admissible value
The unit is operating at a pressure and/or
vacuum that exceeds the admissible value
The suction filter is clogged
The unit has accumulated deposits inside
Suction and/or delivery piping obstructed.
Suction air temperature exceeds 40°C
(+104°F)
The soundproofing is damaged
The impeller scrapes against the casing.
- The unit is operating at a pressure and/or
vacuum that exceeds the admissible value
- Reduction of assembly play due to internal
deposits (dust, impurities in the pipes, process
residues, etc.)
Bearing worn
Unit's installation position unsuitable
The impeller is damaged
The impeller has accumulated deposits
Unit fixing without anti-vibration supports
Rigid connection to the plant
Bearing on the blower or motor side defective
Defective silencer gaskets
Defective cover gaskets
A qualified person appointed to install, operate, set, clean, repair or move a unit or to carry out
Solution
Get the operator to check the electrical connection
against the wiring diagram contained in the terminal
board box.
Check that the power supply voltage, measured at
the motor's terminals, is within +/- 10% of the
nominal voltage.
Get the operator to repair the unit
Get the operator to clean or replace the cartridge
Correct the frequency
Get the operator to clean the impeller, check if it is
worn and, if necessary, replace it.
Get the operator to invert the rotation direction by
switching two of the electrical power supply
conductors.
Identify the leak and seal
Get the operator to check the electrical connection
against the wiring diagram contained in the terminal
board box.
Get the operator to reinstate the power supply
voltage at the terminals at the admissible values
Get the operator to clean or replace the cartridge
Get the operator to clean the inside of the unit
Adjust the system and/or the regulating valve to
lower pressure differentials.
Adjust the system and/or the regulating valve to
lower pressure differentials.
Get the operator to clean or replace the cartridge
Get the operator to clean the inside of the unit
Get the operator to remove any obstructions
Use heat exchangers to reduce the suction air
temperature
Get the operator to replace the soundproofing
Reduce the pressure differentials in the plant
Get the operator to clean the inside of the plant
Get the operator to replace the bearing
Do not fit structures (tanks, steel plating, etc.) on the
unit that can transmit or amplify noise
Get the operator to replace the impeller
Get the operator
Get the operator to fix the unit with anti-vibration
supports
Get the operator to fit flexible hoses between the unit
and the piping
Get the operator to replace the bearing
Get the operator to clean or replace the gaskets
Get the operator to clean or replace the gaskets
GB - 27/63
the unit to clean the inside of