9 Fault Recognition and Rectification
9.1 Basic instructions
The following tables are intended to assist in locating faults.
1. Do not attempt fault rectification measures other than those given in this manual!
2. In all other cases:
Have the fault rectified by an authorized KAESER service representative.
9.2 Faults
Fault
Possible cause
Remedy
Unusual noise when running.
Too much backlash in the tim‐
ing gears.
Call an authorized KAESER
service representative.
Too much play in the rotor
bearings.
Call an authorized KAESER
service representative.
Rotors not synchronized.
Keep the pressure differential
and speed as specified.
Call an authorized KAESER
service representative.
Blower block runs too hot.
Pressure differential too great. Check and correct pressure dif‐
ferential.
Clogged inlet filter reducing air
intake volume.
Clean the inlet filter.
Rotor clearance too large.
Call an authorized KAESER
service representative.
Leakage due to incorrect instal‐
lation of pressure-bearing com‐
ponents.
Call an authorized KAESER
service representative.
Oil leaks from the gas drain.
Oil level too high.
Drain off oil until the correct lev‐
el is reached.
Oil leaking from around the
drive shaft.
Shaft seal defective.
Call an authorized KAESER
service representative.
Reduced air inlet flow.
Rotor clearance too large be‐
cause of wear.
Call an authorized KAESER
service representative.
Intake resistance too high.
Clean the inlet filter.
9
Fault Recognition and Rectification
9.1
Basic instructions
62
Installation and Operating Manual Rotary lobe blower
HBPI pr
Number: 9_9572 28 USE
