GAS COMPRESSORS / BOOSTERS
GAS & AIR MIXING SYSTEMS
AIR BLOWERS & VACUUM PUMPS
The Utile Engineering Co. Ltd.
Irthlingborough, Northamptonshire, NN9 5UG, ENGLAND
Telephone: + 44 (0) 1933 650216 Facsimile: + 44 (0) 1933 652738 Email: [email protected]
www.utileengineering.com
Feb-19
17
IC013 Rev2
Troubleshooting
The following table shows some typical problems and the remedies.
Note: If assistance is required in determining or 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
Low intake pressure
1.
Restriction on intake
2.
Broken impeller
1.
Check intake filter/pipe for blockage
2.
Replace impeller
Low flow
1.
Restriction on intake
2.
Wrong speed
3.
Excessive internal clearance
1.
Remove restriction
2.
Operate at correct speed
3.
Reassemble to correct clearance
Machine overheating
1.
Restriction in cooling system.
2.
Low process flow
1.
Check cooling system function.
2.
Check for restrictions.
High discharge pressure
1.
Restriction on discharge
1.
Check valve position & pipework for
blockage
Discharge temperature excessive
1.
Machine operating at higher duty than
specified.
1. Check rating.
2.
Blocked intake filter.
3.
Insufficient or wrong lubrication.
4.
Restriction on discharge.
5.
Incorrect clearances
2.
Clean intake filter.
3.
Use correct lubrication & feed rates.
4.
Check valve position & pipework for
blockage
5.
Correct clearances
6. Excessive operating temperature
7. High inlet temperature
6. See remedies for excessive discharge
temperature.
7. Reduce inlet temperature.
Excessive bearing temperature
1.
Machine overheating.
2.
Insufficient lubrication.
3.
Drive misalignment/too much tension
1.
Check machine cooling system.
2.
Check/Increase lubrication level/rate.
3.
Realign and retension drive.
Abnormal noise, vibration or periodic
knocking
1. Worn bearing.
1. Replace bearing.
2. Insufficient lubrication
2. Increase lubrication
3. Impeller contacting casing
3. Check temperature, pressure &
internal clearances
4. Drive misalignment
4. Realign and retension drive.
5. Excessive liquid carryover.
6. Loose fixing bolts
7. Inadequate pipe supports
8. Impeller loose.
9. Impeller blade damaged.
5. Drain all points.
6. Check/tighten fixing bolts.
7. Correct pipe supports
8. Tighten impeller.
9. Repair and rebalance, or replace
impeller.
Pressure cannot be built up or only up
to a certain extent.
1. Worn blades.
1. Replace rotor blades.
2. Improper belt tension.
2. Adjust belt tension.
3. Sticking relief valve.
4.
Dirty inlet filter
5. Impeller blade damaged.
6. Leak in pipework.
3. Clean and replace.
4
. Clean and replace.
5. Repair and rebalance, or replace
impeller.
6. Repair pipework
.
Slipping of belts
1. Improper belt tension.
1. Adjust belt tension.
2. Worn belt.
2. Replace with new ones.
Machine does not start
1. Breakdown of electric current
1. Contact power company.
2. Malfunction of motor.
2. Check motor.
3. Wrong motor connections.
3. Check electrical connections.
Excessive loss of lubrication
Faulty Seal
Replace Seal
Excessive power consumption
1.
Operation at wrong pressure ratio
2.
Incorrect clearances
3.
Speed too high
1.
Operate at correct pressure ratio
2.
Reassemble with correct clearances
3.
Reduce speed
Troubleshooting
