Bray 70 Series SERVO PRO - Manual (Page 21)

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BRAY Series 70 Servo Pro
Operation and Maintenance Manual
BRAY Series 70 Servo Pro
Operation and Maintenance Manual
Problem Possible Cause Possible Solutions
Actuator moves back and
forth near setpoint (hunts)
Signal is fluctuating beyond the
deadband setting
Increase the deadband using the
Deadband trim pot
Signal has interference Shield signal from interference.
Actuator does not travel fully
open or fully closed
Travel limit switches are not
set correctly
Set travel limit switches for 90° operation
Servo DIP switches are not
set correctly
See Quick Setup Instructions on page 9.
Mechanical travel stops are not
set correctly
Set mechanical travel stops just outside
the electrical travel limit switch positions
Actuator motor does not run
in either direction and the
green Power LED is off
Power does not match Servo Pro
voltage and phase, fuse is missing
or blown, power is turned off
Verify fuse, verify power voltage and
phase, turn power on & recalibrate
Actuator motor does not run
in either direction and the
green Power LED is on
Limit switches or torque switches
are activated
Verify that the travel limit switches are
properly set; verify torque switches are
presents or set configuration to Torque
Switch Disabled
Handwheel is engaged Push handwheel in (disengage)
Servo Pro is not wired correctly Check all Servo Pro wiring
Motor has thermally tripped Allow motor to cool down
Actuator does not
properly respond to a
command signal
Potentiometer gear is not engaged
or adjusted properly
Engage and adjust potentiometer gear
Command signal does not match
Configuration switches
Set the Configuration switches correctly
Command signal is faulty or wired
incorrectly
Verify the value of the command signal
with a meter and verify the wiring polarity
is correct.
Actuator runs in one
direction only
Wiring is incorrect Correct Wiring
Potentiometer wired backwards
Reverse white and gray wires, see wiring
diagram inside cover
Limit switch or torque switch
is activated
Verify continuity between the wires coming
from the switches. If your actuator has
reached its travel limit, reverse direction.
If one of your torque switches has tripped,
reverse the actuator direction and correct
the over torque condition
Command signal is faulty or
wired incorrectly
Verify the value of the command signal
with a meter and verify the wiring polarity
is correct
6.2 t
roublesHooting
c
Hart