The Utile Engineering Co. Ltd.
15/08/06
Irthlingborough, Northamptonshire. England
Tel: +44 (0) 1933 650216
Fax: +44 (0) 1933 652738
9 IC183
Troubleshooting
The following table shows some typical problems and the remedies.
Note: If assistance is required in determining and correcting the fault with the machine then contact our service
department.
SYMPTONS CAUSES REMEDIES
Machine revolves in wrong direction
Incorrect connection of motor terminal
Re-arrange terminal connection
1. Machine operating at higher duty than
specified.
1. Check rating.
2. Blocked intake filter.
2. Clean intake filter.
Discharge air temperature excessive
3. Warped / Sticking blades
3. Replace blades
1. Dirty inlet air/gas.
1. Clean & inspect intake.
Excessive blade wear
2. Excessive operating temperature
2. See remedies for excessive discharge
temperature.
1. Worn bearing.
1. Replace bearing.
2. Excessive blade wear.
2. Replace blades & check lubrication
3. Erratic cylinder wear.
3. Rebore, redowel & check lubrication.
4. Rotor contacting coverplates
4. Check temperature, pressure &
internal clearances
5. Drive misalignment
5. Realign and retension drive.
6. Warped rotor blades.
6. Replace rotor blades.
Abnormal noise, vibration or periodic
knocking
7. Excessive liquid carryover.
7. Drain all points.
1. Worn blades.
1. Replace rotor blades.
2. Improper belt tension.
2. Adjust belt tension.
Vacuum cannot be built up or only up to
a certain extent.
3. Sticking relief valve.
3. Clean and replace.
1. Improper belt tension.
1. Adjust belt tension.
Slipping of belts
2. Worn belt.
2. Replace with new ones.
Overheating of electric motor
1.Overloading of motor due to excessive
working pressure.
1. Lower working pressure.
1. Breakdown of electric current
1. Contact power company.
2. Malfunction of motor.
2. Check motor.
Machine does not start
3. Wrong motor connections.
3. Check electrical connections.
1. Faulty bearing
1. Replace bearing.
2. Foreign particles in machine.
2. Disassemble machine and remove
foreign particles.
Shaft partially or totally locked
3. Machine seized.
3. Repair machine.
Troubleshooting
