Flowserve 90 Series Solenoid Block Kit - Manual (Page 8)

4. TROUBLESHOOTING
CAUTION: Do NOT disassemble any solenoid valves—a special fixture is required for reassembly.
PROBLEM POSSIBLE CAUSE(S) SOLUTION
Air leak between Loose solenoid screw Tighten screw.
solenoid/block
or between block/housing
Gasket out of position Remove solenoid, realign gasket and
reattach solenoid.
Defective gasket Contact Flowserve for replacement.
Rough surfaces on solenoid block Contact Flowserve for replacement.
Solenoid does not Power supply not connected/not working Check power supply.
energize (go on)
Defective lead wires or (if AC) rectifier Check leads with ohmmeter or try new lead wires.
Defective solenoid valve coil Contact Flowserve.
Solenoid does not Current leakage from DCS or PLC Install capacitor at terminal strip.
de-energize controller (AC only) (Reference section 2.a.)
Defective switch Check switch and wiring.
Solenoid ok – actuator not High valve torque Disconnect valve and check operation/torque.
working correctly
Air supply not connected/low pressure Check supply air piping and pressure.
Tubing connections to M.A.S.; or solenoid Check M.A.S. air connections per Section 1.a-c.
block tubing not correct.
If double-acting on-off type block 1 /
8
" NPT port must not be plugged.
Debris in solenoid valve or block Remove and clean solenoid valve and block-check
filtering per introduction.
No obvious cause(s) Disconnect M.A.S. from actuator; test each unit
separately.
Flow Control Division
Worcester Controls
© 2003 Flowserve Corporation, Irving, Texas, USA. Flowserve and Worcester Controls are registered trademarks of Flowserve Corporation. WCAIM2043 10/03 Printed in USA
For more information about Flowserve Corporation, contact www.flowserve.com or call USA 1-800-225-6989.
FLOWSERVE CORPORATION
FLOW CONTROL DIVISION
1978 Foreman Drive
Cookeville, Tennessee 38501 USA
Phone: 931 432 4021
Facsimile: 931 432 3105
www.flowserve.com
Flowserve Corporation has established industry leadership in the design and manufacture of its products. When properly selected, this Flowserve product is designed to perform its intended function
safely during its useful life. However, the purchaser or user of Flowserve products should be aware that Flowserve products might be used in numerous applications under a wide variety of industrial
service conditions. Although Flowserve can (and often does) provide general guidelines, it cannot provide specific data and warnings for all possible applications. The purchaser/user must therefore
assume the ultimate responsibility for the proper sizing and selection, installation, operation, and maintenance of Flowserve products. The purchaser/user should read and understand the Installation
Operation Maintenance (IOM) instructions included with the product, and train its employees and contractors in the safe use of Flowserve products in connection with the specific application.
While the information and specifications contained in this literature are believed to be accurate, they are supplied for informative purposes only and should not be considered certified or as a guarantee of
satisfactory results by reliance thereon. Nothing contained herein is to be construed as a warranty or guarantee, express or implied, regarding any matter with respect to this product. Because Flowserve
is continually improving and upgrading its product design, the specifications, dimensions and information contained herein are subject to change without notice. Should any question arise concerning
these provisions, the purchaser/user should contact Flowserve Corporation at any one of its worldwide operations or offices.