Bray 70 Series Operation And Maintenance Manual

BRAY Series 70 Electric Actuator
Operation and Maintenance Manual
19
aPPendix b
actuatOr trOubleShOOting chart
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 eld 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 switchplate 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 70 Series Specifications

General

Brand	Bray
Model	70 Series
Category	Controller
Language	English