Yokogawa PK200 - Manual (Page 28)

IM 21B03D01-01E 7-2
7. TROUBLESHOOTING
7.3 Troubleshooting Flow
The PK200 current-to-pneumatic converter causes
relatively few problems as long as it is used correctly.
However, inadequate preparation such as in mounting
or service conditions may result in a problem.
If the converter does not operate normally, take correct
measures by following the flow chart below. Some
problems include a complex cause which may not be
uncovered by the following flow chart. If a problem
appears difficult to correct, contact our service person-
nel.
Replace the converter using a spare.
F0702.EPS
Supply air at normal supply pressure.
Provide heat protection or good
ventilation.
Large output error.
NO
YES
YES
NO
Is air
supplied at normal supply
pressure?
Is the
converter installed
in a place subject to large
temperature changes?
NO
Is control relay defective?
Replace the control relay.
YES
Supply air at normal supply pressure.
Select “A.”
NO
YES
NO
YES
Is air
supplied at normal supply
pressure?
Is A / M selector switch
set to A?
NO
Is the restrictor clogged?
Clean the restrictor.
YES
Replace the converter using a spare.
F0703.EPS
NO
Is control relay defective?
Replace the control relay.
YES
The converter does not operate even when
input signal is applied.