Troubleshooting Guide - Omega FMA 1500 User Manual

8.2

Troubleshooting Guide

INDICATION
lack of
reading or
output
output reads
at (+) or (- )
saturation
only
flow reading
does not
coincide with
the set point
(FMA 1400
models only)
no response
to set point
(FMA 1400
models only)
LIKELY REASON
power supply off
fuse blown
(FMA 1400/1500)
fuse blown
(FMA14PD Series)
filter screen obstructed at inlet
occluded sensor tube
pc board defect
valve adjustment wrong
fuse blown
(FMA 1400/1500)
inadequate gas pressure
filter screen obstructed at inlet
ground loop
inadequate gas pressure
cable or connector
malfunction
set point is too low
(<2% of full scale)
valve adjustment wrong
REMEDY
check connection of power supply
disconnect FMA 1400/1500 transducer
from power supply; remove the short-
ing condition or check polarities; fuse
resets automatically
disconnect power cord from AC
supply; remove and inspect fuses at
AC power input connector of FMA14PD
Series; replace as necessary
REMOVE CAUSE OF SHORT CIRCUIT!
flush clean or disassemble to remove
impediments or replace
flush clean or disassemble to remove
impediments or return to factory for
replacement
return to factory for replacement
re-adjust valve (section 7.4)
disconnect FMA 1400/1500 transducer
from power supply; remove the short-
ing condition or check polarities; fuse
resets automatically
REMOVE CAUSE OF SHORT CIRCUIT!
apply appropriate gas pressure
flush clean or disassemble to remove
impediments or replace
signal and power supply commons are
different
apply appropriate gas pressure
check cables and all connections or
replace
re-adjust set point
re-adjust valve (section 7.4)
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