8
KTM PNEUMATIC ACTUATORS - AW, AWN SERIES
INSTALLATION AND OPERATION MANUAL
SECTION 14 - TROUBLESHOOTING
Trouble examples Causes Measures
Valve does not operate Failure in electric power source or control signal. Check and repair of electric power source and/or control devices.
No or insufficient supply air. Check and repair of air source and attachments
(compressor, filter, reducing valve, etc.)
Failure of attachments
(solenoid valve, air actuated control valve, positioner, etc.)
After checking each attachment separately, repair or replace it.
Failure in actuator. After operating actuator separately, disassemble and repair.
Failure of valve. Check and disassemble valve, and repair or replace it.
Unstable operation of valve Fluctuation or low supply air pressure
(insufficient supply or fluctuation).
Increase capacity of compressed air supply.
Install accumulator.
Increase pipe diameter.
Failure of attachments (solenoid valve, air actuated valve, positioner, etc.)
After trying each attachment separately, repair or replace it.
Leakage at or failure of piston. Replace piston O-ring.
Wear or damage of piston bearing. Replace piston bearing.
Seal leakage in stem. Replace sealing O-ring.
Insufficient power of actuator. Replace actuator with larger one.
Increase supply pressure.
Unstable valve operating torque or increase of valve operating torque. Disassembling and checking valve.
Repair or replace valve parts.
Replace actuator with larger one.
Increase supply pressure.
CAUTION
If there are any troubles in valve, read the
Installation and Maintenance Instructions of
the valve thoroughly and disassemble the valve
carefully.
SECTION 15 - MAINTENANCE
Regular maintenance period depends on
the operating environment and conditions.
Generally maintenance after 100,000 operations
or after 24 months from initial operation,
(whichever comes earlier), is recommended.
Replacing of spring units of single acting
actuator after 200,000 operations or 60 months
from first operation, (whichever comes earlier),
is recommended.
Consumption supplies should be replaced with
new ones at the same time regardless the
degree of wear and deterioration.
For purchasing spare parts, please consult a
Service Company affiliated with Emerson or a
branch office of Emerson.
SECTION 16 - WARRANTY
The warranty period is one year from the date
of installation by the first use of the goods, or
eighteen (18) months from the date of shipment
to the first user, whichever occurs first.
Neither Emerson, Emerson Automation Solutions, nor any of their affiliated entities assumes responsibility for the selection, use or maintenance of any product.
Responsibility for proper selection, use, and maintenance of any product remains solely with the purchaser and end user.
KTM is a mark owned by one of the companies in the Emerson Automation Solutions business unit of Emerson Electric Co. Emerson Automation Solutions,
Emerson and the Emerson logo are trademarks and service marks of Emerson Electric Co. All other marks are the property of their respective owners.
The contents of this publication are presented for informational purposes only, and while every effort has been made to ensure their accuracy, they are not to be construed
as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. All sales are governed by our terms and
conditions, which are available upon request. We reserve the right to modify or improve the designs or specifications of such products at any time without notice.
Emerson.com/FinalControl
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