Bray Series 70 User Manual

19
Series 70 Electric Actuator
Installation, Operation and Maintenance Manual
Actuator Troubleshooting Chart
Appendix B
Problem Possible Cause Solutions
Actuator does not operate
Override is engaged Push handwheel in all the way
Wiring is incorrect Check wiring and power supply
Actuator motor has reached its
thermal shutdown temperature
Allow time to cool
Actuator operates in
reverse directions
Field wiring is reversed Rewire field wiring
Actuator does not fully
close valve (or open valve)
Limit switches are depressed Readjust travel limit switches
Mechanical travel stop is stopping
actuator
Adjust mechanical travel stops
Valve torque requirement is higher
than actuator output
Manually override out of seat, try angle
seating or larger actuator
Optional torque switches are
activating
Valve torque exceeds actuator torque
rating - consult factory
Voltage power supply is low Check power source.
Engaging override
handwheel does not shut
off motor
Override pin is corroded or
damaged
Clean and check for smooth operation of
the override switch pin
Override switch is damaged Replace switch
Disengaging override
hand-wheel does not
restart motor
Not completely disengaged
Push handwheel in as far as possible (no
yellow showing)
Override pin is damaged or and
does not activate switch
Replace override pin
Incorrect wiring of override switch Check wiring
Motor runs but worm and
gear segment do not
Worm gear segment is not
meshing with worm
Remove switch plate and inspect, adjust
travel stops to prevent gear disengaging
Pin/Key on Worm/Motor drive
gear sheared
Replace Pin/Key on drive gear
Corrosion inside unit
Condensation forming
Test heater wiring, should have constant
power
Water leaking in
Check all seals and possible water entry
through conduit

Bray Series 70 Specifications

General

Series	70
Accuracy	±1% of span
Repeatability	±0.5% of span
Housing Material	Aluminum
Input Signal	3-15 psi
Power Supply	N/A (Pneumatic)