Aalborg GFC - Manual (Page 27)

INDICATION LIKELY REASON REMEDY
calibration off gas metered is not the same as use matched calibration
what meter was calibrated for
composition of gas changed see K factor tables in APPENDIX 2
gas leak locate and correct
pc board defective return to factory for replacement
RFE dirty flush clean or disassemble to
remove impediments
occluded sensor tube flush clean or disassemble to
remove impediments or return to
factory for replacement
filter screen obstructed flush clean or disassemble to
at inlet remove impediments or replace
transducer is not check for any tilt or change in the
mounted properly mounting of the transducer;
generally, units are calibrated for
horizontal installation
(relative to the sensor tube)
GFC valve does incorrect valve adjustment re-adjust valve (section 7.2.4)
not work
in open position
pc board defect return to factory for replacement
cable or connectors check cable and connectors
malfunction or replace
differential pressure too high decrease pressure to correct level
insufficient inlet pressure adjust appropriately
GFC valve does incorrect valve adjustment re-adjust valve (section 7.2.4)
not work in
closed position
pc board defect return to factory for replacement
cable or connectors check cable and connectors
malfunction or replace
orifice obstructed disassemble to remove
impediments or return to factory
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