Yokogawa digitalYEWFLO (DY) - Manual (Page 108)

<12. TROUBLESHOOTING>
12-2
IM 01F06A00-01EN
12.3 No Output When The Fluid is Flowing
Is the output signal current
present?
Refer to Section 10.1
"Adjustment" and loop test is OK?
No Check the
polarities.
Yes
Are parameters configured
correctly at operating
conditions?
Yes
Yes
Is "K34:VORTEX FREQ" 0Hz?
Yes
Are the power polarities
correct?
No
Are there any disconnected
power terminals? Fasten the
power terminal. Yes
No
Is the cable broken?
Yes Replace the
cable.
No
Replace the
AMP unit.
Replace the
AMP unit. No
Configure the
parameters correctly. No
Is the low cut configured correctly?
Configure the Low
cut value correctly.
Is the TLA value configured
correctly?
No
No
Configure the TLA value, refer to Section
10.2 "Adjustment for Manual Mode." No
Is the density value configured
correctly? Configure the density value correctly
at operating conditions. No
Yes
Yes
Yes
Is output indicated when
"K25:N.B MODE" is "MANUAL"
and "K26:NOISE RATIO" is "0"?
No
Is there broken the sensor?
No
Replace the
AMP unit.
Replace the
shedder bar Yes
Yes
This case is due to coating of
vortex shedder bar.
Check the shedder bar piping inner
surfaces.
Yes
F1202.ai
Yes Was a faulty area
found with selfdiagnosis?
No
Check for recovery measures, refer to
Section 6.5 "Self-Diagnostic (Error Code List)."
‡,IDEXLOWLQLQGLFDWRULVDWWDFKHG
check the display of the error code.
‡&RQQHFWDKDQGKHOGWHUPLQDODQG
check self-diagnostic.