Ametek Land 4500 MKIII, User Manual

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Opacity and Dust Monitor
User Guide
Model 4500 MkIII
Fault Number List
Fault
Number
Description Recommended Action
1 Zero motor jammed. Check the Zero Reflector drive mechanism. Warning – Do not move the
mechanism by hand or the precision gearbox may be irreparably damaged.
2 Upscale motor jammed. Check the Upscale Filter drive mechanism. Warning – Do not move the
mechanism by hand or the precision gearbox may be irreparably damaged.
3 Source LED failed Check the Source LED connections. Replace the Source LED Assembly.
4 Flood LED failed Check the Flood LED connections. Replace the Flood LED Assembly.
5 ADC Over-range The signal arriving at the Analogue-to-Digital Converter is too large. Check
that the correct reflector element and aperture plate are fitted in the retro-
reflector. Replace the Detector PCB. Warning – The Detector PCB must be
optically aligned.
6 ADC Fault The Analogue-to-Digital Converter is not working. Replace the Detector
PCB. Warning – The Detector PCB must be optically aligned.
7 Transceiver shutter fault If fitted, the fail-safe shutter should close during calibration check and
then reopen.
Check shutter wiring.
Check shutter operation during calibration check.
Replace shutter motor or clutch.
Replace shutter. As a temporary measure, a faulty shutter can be locked
open to allow opacity measurements to continue. Refer to E3 below.
8 Retro shutter fault As 7 above.
9 Transceiver blower fault Check blower power.
Check pressure switch wiring.
Check blower filter.
10 Retro blower fault As 9 above
11 AFU Fault Communications lost to Auxiliary Functions Unit.
Check wiring to AFU. Check links LK1 and LK2 are fitted (refer to Section
A4.8).
Possible hardware fault in AFU - replace main board.
13 Negative Opacity Check that the installation pathlength is correct. Perform a Clear Stack
Calibration.
14 Checksum Error The microprocessor’s program memory is defective. Re-program the Main
PCB. Change the Main PCB. Warning – All of the instrument settings and
calibration constants are stored on the Main PCB. Re-enter this data after
changing the PCB.
15 Lens Contamination Limit The zero drift correction system has reached its limit. Clean the main lens.
Perform a Calibration Check. If the problem persists, make sure the Zero
Reflector is clean. Note that this fault can only be cleared by a successful
Calibration Check or Clear Stack Calibration.
16 Failure during Calibration Something has prevented completion of a calibration. User actions can
cause this fault. Perform a Calibration Check. If the problem persists,
check the Zero Reflector and Upscale Filter drive mechanisms. Warning –
Do not move either mechanism by hand or the precision gearbox may be
damaged irreparably.
Note
When contacting Land Instruments Service Department please have the
Instrument Type and Serial Number available. This will ensure a more
accurate and efficient response.