Honeywell Searchline Excel, Техническое руководство

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65
MAN0530 Issue 10 - 11/09 Searchline Excel
2104M0506
5. PROBLEM SOLVING
Fault/Problem Causes Remedies
Diagnostics Receiver misaligned
1) Re-align the Receiver, first using the
report telescope and then using the Interrogator.
Neg Gas 2) Re-zero the unit.
reading
Contamination of windows 1) Check the Transmitter and Receiver
windows for build up of contamination.
Clean windows if required.
See Chapter 5 .
2) Re-zero the unit.
Negative drift of unit’s zero Re-zero the unit.
position
Diagnostics Receiver misaligned
1) Re-align the Receiver, first using the
report telescope and then using the Interrogator.
baseline drift 2) Re-zero the unit.
Contamination of windows 1) Check the Transmitter and Receiver
windows for build up of contamination.
Clean windows if required.
2) Re-zero the unit.
Drift of unit’s baseline Re-zero the unit
Diagnostics Unit has been operated
1) When Ex certified equipment is
report at a temperature outside
operated outside its certified range, its
bad
its specified and certified range type approval certification is invalidated
temperature along with its warranty.
Such equipment should be removed from
service in potentially explosive
atmospheres.
2) Investigate the cause of the excessive
temperature excursion and take steps to
prevent recurrence. (e.g. fit sunshade or
heat-shield, or relocate detector, etc.)
Diagnostics Incorrect supply voltage
1) Check that the +24V supply voltage is
report reaching unit reaching the unit
supply fault
(it should be b18V and +32V).
2) Identify the cause of incorrect supply
voltage reaching the unit and rectify.
Diagnostics Fault on the unit's digital If this fault is displayed when the unit is
report PCB interrogated, it cannot be remedied
dsP fault
in the field.
Diagnostics A fault has been detected in If this fault is displayed when the unit is
report the NV-RAM interrogated, it cannot be remedied
Nv-ram fault
in the field.
Diagnostics The time and date record 1) Re-enter the time and date using the
report being stored by the Real Interrogator.
rtC fault Time Clock (RTC) has been 2) Cycle the power applied to the unit.
lost 3) Verify that the time and date record was
maintained after cycling the power.
Diagnostics Voltage reference fault If this fault is displayed when the unit is
report detected interrogated, it cannot be remedied in the
volt ref fault
field.