MULTIPLEX
Atmospheric Oil Mist Detection System
AM8/JANUARY 2015
EMAIL qmi@oilmist.com WEBSITE www.oilmist.com 4 East Barnet Road, London, England, EN4 8RW TEL +44 (0)20 7328 3121
Maintenance Part5-2
MAINTENANCE PROCEDURES
The QMI MULTIPLEX incorporates an operational fault finding system, which will
identify operational and component breakdowns. During operational breakdowns, a
fault code is displayed against the relevant Sensor number. The possible fault codes
are listed on the Monitor front plate.
In the event of a component breakdown or fault, the CPU light will come on, see Fault
Directory, Part 4.
With all fault indications the fault warning relay is non - energised. The relay may be
returned to normal through the ‘RESET’ function. The warning indication on the digital
display will persist until the fault is corrected or the channel isolated.
SENSOR CLEANLINESS
A large percentage of returns under Warranty are in fact due to dirty lenses. Very often,
due to difficult working conditions and lack of experience, the lenses in the Sensor are
not properly cleaned. This problem is made more difficult because the operator has
to return to the Monitor in order to check the cleanliness of the lenses. The cleaning
process is outlined in Part 5-3.
CLEANING SENSOR LENSES
The Monitor will indicate when the lenses need cleaning (Fault Directory Part 4).
To clean the lenses see Part 5-3.
REPLACING SENSOR FAN (Q1004)
The Monitor will indicate when there is a Fan Fault and F3 will appear (Fault Directory
Part 4-3 & 4-4).
To replace the Fan see Part 5-5.
NOTE: IT IS HIGHLY RECOMMENDED THAT A CLEAN
AND WORKING SPARE SENSOR BE INSTALLED WHILE
CLEANING A SENSOR.
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