Greenheck S73 Series - Manual (Page 14)

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Problem Possible cause Solutions
Actuator does not operate Cams are depressing travel switch Adjust cams to their correct positions
Override is engaged/shaft depressed Apply electricity to cancel manual
mode
Wiring is incorrect Check wiring and power supply
Actuator has reached its thermal Allow time to cool
shutdown temperature
Actuator operates in reverse Field wiring is reversed Rewire field wiring
directions
Actuator does not fully close valve
Limit switches are tripping Readjust travel limit switches
(or open valve) Valve torque requirement is higher Manually override out of seat, try
than actuator output angle seating or fit larger actuator
Voltage power supply is low Check power source
Motor hums but does not run Motor brake engaged Check that brake is not obstructed
Corrosion inside unit Condensation forming Test heater wiring, should have
constant power supply
Water leaking into the unit Check all seals and possible water
entry through conduit
BRAY Series 73 Electric Actuator
Operation and Maintenance Manual
12