EN
EN-22
80446693 Rev. B
5. MAINTENANCE
5.7 Fault finding
A guide to fault conditions and their possible causes is provided in Table 15 to assist you in basic fault finding.
If you are unable to rectify a fault when you use this guide, call your supplier or your nearest
Ingersoll Rand
Service Centre for
advice.
Note:
If you have been approved to carry out strip-down, repair and reassembly of your blower, refer to the Service Manual supplied
separately for detailed procedures.
Symptom
Check
Actions
The blower will not start, or
seizes during operation.
Are the rotors touching ?
Check the rotor clearances and adjust as
necessary.
Has the blower been overloaded ?
Check the required operating conditions and
specified performance of the blower (see
Section 2).
Has debris or foreign material entered the
blower ?
Strip down, clean and repair the blower as
necessary.
Is the drive/transmission system faulty ?
Check that your drive and transmission
system is operating correctly, and that it is
correctly fitted to the blower: refer to Section
3.6 and to the manufacturer’s instructions.
The blower is noisy during
operation.
Are the rotors touching ?
Check the rotor clearances and adjust as
necessary.
Are the gear and/or bearing clearances
incorrect ?
Check the clearances and adjust as necessary.
Are the rotors unbalanced ?
Clean the rotors and rotor housing, then
check the rotor clearances and adjust as
necessary.
The blower overheats.
Is the inlet filter blocked ?
Clean or replace the filter.
Is the differential pressure across the
blower too high ?
Check that your system design complies with
the requirements of Section 3.2, and that the
blower is suitable for use in your application.
Is an oil level too high, or has the incorrect
grade of oil been used ?
Check the oil levels (refer to Section 5.3) or
drain the blower and fill with the correct
grade of oil (refer to Section 5.5).
Are the rotor or rotor/casing clearances
incorrect ?
Contact your supplier or
Ingersoll Rand
for
advice.
Is there inadequate clearance around the
blower ?
Ensure that there is sufficient clearance
around the blower to provide for free
circulation of ambient cooling air.
The blower overheats
(continued).
Does your enclosure provide inadequate
cooling ?
If you have fitted an acoustic enclosure
around the blower:
Ensure that the enclosure cooling vents/
louvres are unobstructed.
Ensure that the enclosure cooling/extraction
fan is operating correctly.
Ensure that there is sufficient clearance for
cooling air flow around the blower: refer to
Section 3.2.
There is oil in the gas stream
from the blower.
Is an oil level too high ?
Check the oil levels and if necessary drain oil
from the blower: refer to Section 5.3.
Have the sealing rings failed ?
Contact your supplier or
Ingersoll Rand
for
advice.
www.fraserwoods.ca
