Quality Monitoring Instruments QMI MULTIPLEX Manual page 57

FAULT DIRECTORY
FAULT
F1 and
Detector
Check cable between Monitor
number
and Head
appears on
display
F1 and all Check fuse FS1 on the Power
Channel Lights Supply Board – see drawing
flash QMI-05-1110 Part 4-2
Check the fuse FS1 on the
F1 and all
Power Supply board – see
Channel lights
drawing
flash
QMI-05-1110 Part 4-2
Make up a short lead with
a 6-pin male and female
connector from the spares kit.
Plug spare QMI Detector Head
F1 on display
into Monitor on the defective
and Channel
channel number shown
number shown
If the display becomes steady
this confirms there is a fault in
the cable between the Monitor
and Detector Head
Remove Head. Clean Lens.
F2 dirty lens on Check 1" BSP. bypass valve
display on suction side of fan has not
been closed down enough.
EM6/March 2015
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 REMEDY
F1 denotes cable fault. Check for
split, damaged cable or incorrect
earthing - see wiring instructions
- (Part 2-13, 2-15, 2-16)
If the fuse has blown replace with a
1.25A fuse. If the fuse blows again,
check complete wiring of the system
for short-circuits or damaged wires
If the fuse is OK, then the TR1
should be replaced – see drawing
QMI-05-1110 Part 4-2
Check that the cable is earthed
between the Monitor and Detector
Head as the manual directs
Check that there are NO OTHER
earth leads, or copper earth trips as
these will give interference
If the labyrinth in the Detector Head
is very oily, check that there is a
filter in the Back Plate and it is still
attached to the engine
If there is, then, if possible, extend
the ¾" BSP pipe. Work to raise the
Head above the ¾" BSP aperture
hole in crankcase
Continual dirty lenses are usually
caused by oil being thrown into the
Detector Head. Raising the Head is
the only long term solution. Fit 40%
filter
Fault Finding Part4-3