Quality Monitoring Instruments QMI MULTIPLEX Manual page 58

FAULT
F3 and
Detector
number Take Head off. Clean lens
appears on
display
F4 on Monitor Check Fuse FS2 on the Power
display Supply Board- see drawing
"Fan Failure" QMI-05-1110 Part 4-2
F4 on Monitor
display "Fan Check Fan
Failure"
Check if F4 clears after using
F4 the
self-test program
F4 on display Check if fan is running
F9 on display Select reset
No Central
Processing Unit
Check internal connections
(CPU) lights on
display
Fault Finding Part4-4
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
Replace Head. If F3 still shows
return to QMI (works) for repair
Isolate channel if no spare Heads
are available
If the fuse has blown replace it with
a 400mA anti-surge fuse
After changing the fuse, if it blows
again check the wiring of Fan
Failure circuit from the Monitor to
the Junction Box and then from
the Junction Box to the Fan Failure
Control Housing
If stopped, change Fan. If
replacement Fan has no sensor
fitted, short out 2-pin Fan Failure
Connector on Monitor or Junction
Box then touch "reset" to clear
display
Disconnect power to Fan Failure
Housing before opening
If Fan is rotating check Fan Failure
Board in Fan Failure Housing
If red light is out check Fan Failure
Sensor
This could indicate that the magnetic
sensor is faulty
To prove this - if the Fan is still
running and you are getting F4 this
means either the electromagnetic
sensor needs to be replaced or the
Monitor needs to be re-set after
carrying out the self-test program
Check that Fan Failure Housing
indicator is lit or re-set the Monitor
Return the MP12 PCB v 3.2 to QMI
for repair at the earliest opportunity
The CPU light indicates a fault on
MP12 PCB v 3.2
This board is either carried as a
spare or is ex-stock QMI
EM6/March 2015