Quality Monitoring Instruments QMI MULTIPLEX Manual page 60

FAULT
Other causes of 0% reading
that applies to ALL ENGINES
- air leakage into the Detector
- air in the pipework will also
give
a very low reading
1.
2.
If reading
3.
shows
0% when the
engine is
running
4.
5.
Detector Heads
show up to Check if engine has just shut
5% oil mist down, oil mist will linger for a
when engine is time
stopped
On start up
of system
Monitor display
Check if cable is screened
is erratic and
does not settle
down
Fault Finding Part4-6
EMAIL qmi@oilmist.com WEBSITE www.oilmist.com 4 East Barnet Road, London, EN4 8RW, UK. TEL +44 (0)20 7328 3121
Engine Oil Mist Detection System
MULTIPLEX
ACTION
Check to see if filter is
blocked
Check if pipework or
Detectors are vertical or
horizontal so there is no
low point for oil to settle
thereby blocking the air
flow.
Check that pipework has
not been installed under
stress, castings have
warped allowing air into
sample chamber which
will dilute the oil mist
sample.
Check exhaust pipework
is returning to crankspace
or breather
Check air control valve is
still set properly
REMEDY
If Detector is not in a vertical
position (see drawings QMI-05-1099
Part 2-8 and QMI-05-1096 Part
1-5) oil will collect in the unit and
pipework
Make sure pipework to the Detector
is not under any strain as this will
after some time cause the Detector
castings to buckle which will result
in a large air leak
If this does not resolve the problem
contact QMI giving the Monitor and
Detector serial numbers together
with an explanation of the fault
Turn OFF Lubricating Pumps
If screened, check that screen is
connected to Pin 5 at both ends of
the cable. Make sure the braid or
drain wire does not come in contact
with other terminals at each end of
the cable
EM6/March 2015