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Nov-21
Page 101 of 132
59812-K001 Rev 10
5.2.3
Detector CPU Fault
The detector continually checks the operation of the detector software to ensure that it has not been
corrupted or locked up. If an error in the software operation occurs an automatic reset will be performed
to restart the detector operation. If the software has been successfully restarted the performance of an
automatic reset is indicated in the event log as a Detector CPU Fault.
1.
Examine the event log.
If the detector has repeatedly indicated a Detector CPU Fault the detector should be replaced.
2.
Accept and Reset the fault at the Control Panel.
3.
Monitor the system.
If the detector repeatedly indicates a Detector CPU Fault the detector should be replaced.
5.2.4
Detector Fault
As part of the oil mist measurement process light scattered from the oil mist particles in the sample
chamber is measured by a photodiode. Over time condensing oil can build up on glass in front of the
photodiode causing the light reaching the photodiode to be reduced. The OMD Mk6 Detector monitors
the level of light reaching the photodiode and produces a fault indication if the light level drops below a
predetermined limit.
Testing of the photodiode is performed automatically as part of the system test performed at 16:00hrs
or maybe performed manually via the Optics Test in the Test Menu, see 3.5.
If the light level reaching the photodiode falls below the allowed limit the detector will communicate
the fault to the Control Panel. The Control Panel will then indicate a detector fault, see section 5.1.1.
Figure 141
Detector Fault
Inspection of the engine event log, see section 3.6, will list the event:
Detector Fault Eng X Det Y
Clean the detector, see section 4.4 for proper Detector Head removal, cleaning and refitting. Ensure
Detector Heads & Detector base O-Ring seals are properly fitted with Molykote O-Ring Lubricant.
5.2.5
Engine Relay Fault
The operation of the engine shutdown / slowdown relays is continuously monitored at the Control Panel.
A fault in the relay operation may result in the relay failing to operate when an alarm occurs. If an Engine
Relay Fault is indicated in the event log the Control Panel Interface Board should be replaced.
5.2.6
Fan Fault
The fan fitted to the detector head is required to draw the air from the engine into the detector sample
chamber. The detector continuously monitors the operation of the fan and communicates a fault to the
Control Panel if the fan stops rotating.
Summary of Contents for Graviner Mk6
Page 16: ...Nov 21 Page 16 of 132 59812 K001 Rev 10 Height 309mm Width 559mm Depth 118 5mm Weight 8 7kg ...
Page 26: ...Nov 21 Page 26 of 132 59812 K001 Rev 10 Figure 9 Junction Box Installation ...
Page 29: ...Nov 21 Page 29 of 132 59812 K001 Rev 10 Figure 12 Detector Head Installation ...
Page 46: ...Nov 21 Page 46 of 132 59812 K001 Rev 10 Figure 36 System Drawing ...
Page 47: ...Nov 21 Page 47 of 132 59812 K001 Rev 10 Figure 37 Wiring Diagram ...
Page 112: ...Nov 21 Page 112 of 132 59812 K001 Rev 10 6 6 1 CONTROL PANEL Figure 158 Control Panel Door ...
Page 123: ...Nov 21 Page 123 of 132 59812 K001 Rev 10 ...
Page 126: ...Nov 21 Page 126 of 132 59812 K001 Rev 10 ...