Yokogawa digitalYEWFLO (DY) - Manual (Page 93)

IM 1F2B4-01-YIA
Page 88
TROUBLESHOOTING
VI. ERROR CODES
6.1 E
RROR
C
ODE
L
ISTING
Effect on Output
Effect on Indication via local Digital Display
Error
No.
Diagnostic
Message
Error definition and
Probability Cause
Current Output
Pulse Output
Rate in %
Output
Rate in
Engineering
Units
Totalizer
Corrective Action
1
Over
Output
This error signifies that the flow exceeds the meter span by over 110%.
Output driven to a fixed 110%.
Normal Operation
Indication is driven to a fixed 110% of the span.
Normal Operation
Normal Operation
Respan the meter or correct the overrange condition.
2
Span Set
error
A span setting error indicates that the span velocity limits have been exceeded. (32 ft/sec for liquids and 262 ft/sec for gas). Sensor may be damaged. Contact Yokogawa Industrial Automation service department for analysis.
Output may be non-linear.
Output may be non-linear.
Output may be non-linear.
Output may be non-linear.
Output may be non-linear.
Correct the span setting in parameter B51 and B52 to meet the velocity limitations of the meter.
3
NJ circuit
error
Noise discrimination circuit is not functioning properly.
Normal Operation
Normal Operation
Normal Operation
Normal Operation
Normal Operation
Amplifier replacement required. Contact Yokogawa Industrial Automation service dept.
4
Pulse Out
error
The pulse output span has exceeded 6K Hertz.
Normal Operation
Output is limited to 6K Hertz.
Normal Operation
Normal Operation
Normal Operation
Check parameter settings, in particular C02.
5
EE Prom
error
EE prom is not functioning correctly.
Output is fixed at 1.25%.
No output
Output is fixed at -1.25%.
Output is fixed at 0.0%.
No output
Amplifier replacement required. Contact Yokogawa Industrial Automation service dept.
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CPU error
The CPU has failed and the meter is not functioning. The display and self- diagnostics are completely inoperable.
Output is fixed at 1.25%.
No output
No output
No output
No output
Amplifier replacement required. Contact Yokogawa Industrial Automation service dept.