TROUBLESHOOTING
700 Series Controller Troubleshooting
Problem
Cause
Correction
ERR 1 is displayed
Controller power has been connected and the
control is not sure of the state of the operation.
Press the UP arrow and the control should reset.
ERR 2 is displayed
Controller power does not match 50 or 60 Hz.
Disconnect and reconnect the power.
If problem persists, obtain the appropriate controller or
AC adapter for either 50 or 60 Hz power.
ERR 3 is displayed
Controller does not know the position of the
camshaft. Camshaft should be rotating to find
Home position.
Wait for two minutes for the controller to return to Home
position. The hourglass should be flashing on the display
indicating the motor is running.
Camshaft is not turning during ERR 3 display.
Check that motor is connected.
Verify that motor wire harness is connected to motor and
controller module.
Verify that optical sensor is connected and in place.
Verify that motor gear has engaged cam gear.
If everything is connected, try replacing in this order:
—Wire harness, Motor and Optical Sensor Assembly
—Controller
If camshaft is turning for more than five minutes
to find Home position:
Verify that optical sensor is in place and connected to
wire.
Verify that camshaft is connected appropriately.
Verify that no dirt or rubbish is clogging any of the cam
slots.
If motor continues to rotate indefinitely, replace the
following components in this order:
—Wire harness, Motor and Optical Sensor Assembly
—Controller
Four dashes displayed:
— — : — —
Power failure occurred
Press SET to reset the time display.
AUTOTROL
®
740/760 Control 255 & Performa Series Valves (268, 268FA) Service Manual
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