Ultima OPIR-5 Detector
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5.0 Troubleshooting
If equipment or qualified personnel required to troubleshoot are not available, it is
recommended that the defective unit be returned to MSA for repair.
CAUTION:
MSA’s warranty will be voided if damage results from repair attempts other than
routine replacement of recommended spare parts. Repairs performed by persons
other than MSA’s authorized personnel may void the warranty. Please read the
warranty statement carefully. A defective Ultima OPIR-5 Detector Infrared Open
Path System should be returned to the factory for repair even if the warranty has
expired. A complete written description of the problem should be included with all
returned equipment.
CAUTION:
Component level repair must be undertaken either by MSA personnel, or by
competent authorized service engineers. SMT PCB repair shall only be
performed at an MSA facility. Failure to comply with this requirement will
invalidate the warranty.
Be sure to inhibit or disconnect the external alarm wiring before making any check, which
might send the unit into alarm.
5.1 Fault Codes
The Ultima OPIR-5 Detector will indicate a fault code number on the three-digit display as an
aid to troubleshooting. The following list identifies the fault codes, gives a description of the
fault, and indicates the corrective action that should be taken.
Multiple faults will result in alternating fault codes being displayed. All faults have a 10-second
delay before activating, unless otherwise noted. There are twelve fault conditions monitored by
the microprocessor:
5.1.1 F0 Excessive Negative Drift or High IR
This fault indicates either excessive LEL-m negative drift or excess IR received.
ACTION
– Verify that the distance between the Source and Receiver is greater than the
range minimum. Align the system. Protect the Receiver from stray IR sources.
5.1.2 F1
Partial
Beam
Block or Dirty Lens
This fault indicates the Receiver is seeing less than optimum infrared from the Source.
ACTION
– Unit windows should be cleaned and the optical path checked for blockage.
If
the window is clean and the path is clear,
realigning the Source and Receiver when no
background gas is present should correct this fault.
5.1.3 F2
Alignment
This fault indicates that the alignment of the Ultima OPIR-5 Detector is outside of the
manufacturers limits.
ACTION
– Realign the unit until the
AJ
value is close to the typical values listed in Section
3.7 Applying Power & Alignment Mode.
