Quarter -Turn Electric Valve Actuator【OM Series】 Sun Yeh Ele. Ind. Co., Ltd. | 2021.11
7. Troubleshooting
Floating Controller
Motor does not operate or overheats
a. The limit switch for fully-closed does not
trip.
b. Motor shaft or bearing were stuck.
c. Power applied to terminals #3 and #4
simultaneously (Abnormal Wiring).
d. Jammed pipe or valve seat stuck.
e. The seating torque of valve increased
caused by oxidized seals and has resulted
in a torque overload on actuator.
a. Operate the actuator manually to
fully-closed position and confirm if the
limit switch trips.
b. Replace a new motor.
c. Follow the wiring diagram inside the cover
to connect wires and make sure the wiring
is correct.
d. Check if any blockage or obstacle in pipe
and remove.
e. Manual operate to check if it can be
operated, if not, replace the valve.
The actuator operates but the motor is hot.
a. The mechanical stop screws ran into the
output drive gearing.
b. A torque overload caused by the valve.
c. Wrong power supply.
d. Actuator operates too frequently and
exceeded duty cycle rating.
a. Reset the mechanical end stops and travel
cams, please refer to 4.4.2 (P.11 - P.16).
b. This problem happened frequently after
valve operating for a long time. It is
suggested to replace with a new valve.
c. Check the power supply.
d. Adjust the system bandwidth or reduce the
frequency of operation, please refer to 3.5
(P.6).
To control two or more actuators, sometimes the actuator works abnormally and the motor is
getting hot.
a. Install Isolating Relay Module (Optional).
b. Please contact your distributor to acquire
the wiring diagram for parallel
connection.
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