Operation Manual

8-11
IM 1F5B2-01E
8. MAINTENANCE
8.4.2 Specific Troubleshooting Flows
■ Output is indicated but no fluid is flowing.
START
Is ULTRA YEWFLO
properly grounded?
P: Is no pulse present?
TP2: The signal
resonates to 50/60
Hz.
Check the fluid in the
pipeline.
Raise the trigger level.
Fill the pipeline.
Empty the pipeline.
There is a failure in the
emptiness-sensing
system.
Contact Yokogawa’s
service personnel.
Output is indicated.
Output is indicated.
YES
NO
NO
NO
The output circuit of the
converter is faulty. Replace
the converter.
Full
Empty
Ground ULTRA
YEWFLO.
YES
YES
Output is indicated.