VAF instruments OILCON MARK 6M - Fault Finding Guide

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15.2 FAULT FINDING GUIDE
The structure of the following fault finding guide is that the correct functioning path is on the left of
the page; the section of the manual for the fault finding is indicated on the right of the page. To use
the guide, start at the beginning and take the monitor through the outlined operating procedure,
checking that the monitor operates correctly at each point. Should the monitor not operate as
specified, refer to the right side of the page and turn to that section of the manual or refer directly to
the fault as indicated on the MCU.
If the fault cannot be rectified from this guide, please contact VAF Instruments to request specialist
assistance.
Refer to the serial number of the monitor and explain up to which section in this guide the monitor
worked correctly.
Correct Functioning Path When Faulty
1
Turn the switch of the MCU to “Control Unit”.
The display of MCU will indicate “STANDBY”.
Refer to section 15.6
2
Press the SETUP key to enter the setup mode.
Select during SETUP the appropriate sample point and oil type.
Refer to section 15.4
3
Press the FLUSH key to enter the FLUSH mode and wait 7 minutes.
Refer to section 15.4
4
Air is supplied to the solenoid valves in the EPU.
Solenoid V10 and the selected sample valve is energised.
Refer to section 15.8
5
The pneumatic shuttle valve on the skid assembly activates.
Solenoid V10 together with the selected sample valve in the pump
room are opened.
Refer to section 15.9
6
The lamp “Running” on the starter box lights up.
Refer to section 15.11.1
7
The sample pump starts. The monitor is now in the BACKFLUSH
MODE. Fresh water is being pumped from the fresh water inlet,
through the sample pump, through the detector cell and via V11
discharged through the sample inlet port of the skid back to the
sample probe selected.
Refer to section 15.11.2
8
After approximately 2 minutes the FORWARD FLUSH mode is
entered and a window wash is performed for 12sec.
Refer to section 15.4
9
In the EPU solenoid V11 is energised and solenoid V12 is energised
for 12sec.
Refer to section 15.8
10
The window wash pump on the skid assembly operates for a few
strokes.
Refer to section 15.10
11
The pneumatic valve V11 on the skid assembly is now open.
The monitor is now in the FORWARD FLUSH MODE.
Clean water is pumped from the fresh water inlet through the sample
pump, detector cell and then discharge through the sample outlet
port into the slop tank/discharge line.
Refer to section 15.9