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MAN0530 Issue 15 - 07/17
2104M0506
The majority of gas detector problems/faults can be diagnosed and corrected using the
installation and alignment kit.
The alignment kit includes:
•
SHC1 Handheld Interrogator
•
alignment telescope
•
set of functional test filters
An electrical multimeter is also useful when diagnosing electrical/wiring problems.
Refer to the troubleshooting tables in this chapter for a list of problems, possible causes and
actions.
Caution: Searchline Excel does not contain any user serviceable parts. Do not open either
the Transmitter or Receiver unit. The warranty of units which have been opened is
invalidated.
NOTE:
THE INFRARED BEAM IS INVISIBLE AND EYE SAFE.
RS485 Modbus signal errors may occur when Excel is connected via a DVC100(M) MK2 or
DX100(M) Termination Unit and is interrogated/commanded from a network control centre.
For troubleshooting these issues refer to the DX100 Series Termination Units Technical
Handbook.
If, after following the recommendations in this section, the problem persists, please make
available the following information before contacting Honeywell Analytics:
•
Installation Check Sheet
See Chapter 3.
•
Any error message
Displayed on the Handheld Interrogator screen.
•
Any error code
Displayed on the Handheld Interrogator screen.
Fault/Problem
Causes
Output is 0mA
Unit is in FAULT Connect the SHC1 Interrogator to the unit and use its
condition
Beam block
Transmitter
or Receiver
misaligned
5. PROBLEM SOLVING
Remedies
DIAGNOSTIC menu options to ascertain the reason for the
FAULT report.
Check that beam path is clear from the Transmitter to
the Receiver. Remove any obstruction if present.
1)
2)
3)
4)
Connect the SHC1 Handheld Interrogator to the
unit and check the signal levels.
If signal levels are low, use the telescope and
Interrogator to optimise Receiver alignment.
If signal levels remain low after re-aligning
Receiver, check the Transmitter alignment using telescope.
Re-zero the unit after alignment. See Appendix A.5.3.4.
63
Searchline Excel
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