Flowserve Ramcon Series Electric Actuators - Manual (Page 7)

17710-B 7
Flow Control Division
McCANNA Actuation Systems
Troubleshooting
Power interruption due to power
failure or from loose or broken
wires, tripped circuit breakers, etc.
High voltage causing burnout.
Shorted switches or other electric
components due to foreign material
or wiring not properly routed.
Correct position of declutch lever
(250BR, 500BR).
Damaged or corroded switch
contacts.
Low Voltage.
Capacitor function.
Gear Train free.
Motor alignment.
Brake not releasing.
Stops operating
Cam may be loose on the shaft.
Cam may be worn and miss the limit
switch.
Switch mounting may be loose.
Switch may be stuck on its closed
position.
Cam shaft may be bent away from
the switch. Continuous turning
in one direction on
reversible actuator
Continuous turning
during one of the
travel segments on
unidirectional actuator
Reduced torque output
Hot areas, either line or ambient.
Excessive duty cycle.
Stalling due to incorrect cam setting.
(See Paragraph B under Mechanical
on page 2).
Obstruction preventing cam travel to
switching point.
Forward and reverse windings
powered at the same time. Overheating
Power not getting to the motor.
Limit switch open.
Switch contact resistance.
Capacitor function on AC actuators.
Brush/commutator continuity on DC
actuators.
Optional brake not being released (not
wired, coil problems or relay
problems). Actuator will not run
Brake not releasing.
Excessive torque in valve.
Both limit switches being powered
(control circuit or wiring).
Both motor windings being powered
(within actuator). Actuator runs slower
than rating
Gear train may be worn, broken, or
incorrectly assembled in the field.
Correct position of declutch lever
(250BR, 500BR) Motor turning but
output shaft stationary
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NOTICE
McCANNA actuators are designed and manufactured using good workmanship and materials, and they meet all applicable industry standards.
Flowserve is anxious to avoid injuries and property damage which would result from misapplication of the product. Proper selection is
imperative. Examples of misapplication or misuse include use in a service in which the pressure/temperature rating is excessed or in a chemical
service incompatible with the materials of construction; use of undersized actuators; use of extremely fast actuation and/or continuous cycling on
standard product; making modifications of the product of any kind; failure to use caution on operating in high-temperature, high-pressure, or
highly hazardous services; failure to maintain product as recommended.