SMAR FY301, Instruction, Operations & Maintenance Manual

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Section 5
5.1
MAINTENANCE PROCEDURES
General Information
NOTE
Equipment installed in hazardous atmospheres must be inspected in compliance with the IEC60079-17 standard.
FY301
Valve Positioners are extensively tested and i nspected before delivered to the end us er.
Nevertheless, during their design and development, consideration was given to the possibility of repairs
by the end user, if necessary.
In general, it is recommended that the end user do not try to repair printed circuit boards. Instead, he
should have spare circuit boards, which may be ordered from Smar whenever necessary.
The maintenance procedure is a set of techniques with the purpose to keep the positioners with higher
time of use (useful life), to operate in safe conditions and to promote costs reduction. The different
maintenance types are described during this section.
Recommendations for mounting Approved Equipments with the IP66 W
certifications (use in saline atmospheres)
NOTE
This certification is valid for stainless steel positioners manufactured, approved with the certification
IP66 W. All positioner external material, such as gauge, plugs, connections etc., should be made in
stainless steel.
The electrical connection with 1/2” – 14NPT thread must use a sealant. A non-hardening silicone
sealant is recommended.
The instrument modification or replacement parts supplied by other than authorized representative
of Smar is prohibited and will void the certification.
Corrective Maintenance for the Positioner
Maintenance not planned, with the purpose to locate and to repair problems in the positioners operating
in continuous work, or either, specifically to suppress defects already presented by the equipment.
The diagnostic are a set of methods to detect, to locate and eventually to correct errors and problems
or even verify fail effects in the positioner.
Diagnostics without Configurator
In order to carry out the diagnostics, refer to table 5.1.
DIAGNOSTICS
SYMPTOM PROBABLE ERROR SOURCE
POSITION
SHOWN ON DISPLAY
Positioner Connections
Check wiring polarity and continuity.
Power Supply must be a current source
Check signal input current. Minimum current for positioner operation is 3.8 mA.
Electronics Failure
Check circuit boards for bad connections and replace them for spare boards.
NO RESPONSE
TO INPUT SIGNAL
Pressure Output Connections
Check up on air leaks.
Air Supply Pressure
Check the air supply pressure. The input pressure to positioner shall be between 20 psi and
100 psi.
Calibration
Check the positioner calibration points.