DoorKing 9220 - Manual (Page 46)

5.2 Operator Diagnostics
This gate operator is designed with built-in diagnostics that will alert you to potential or existing
problems that the microprocessor has detected. Specific fault conditions are checked and the
operator will signal that a fault exist through the built-in alarm.
Constant tone is heard when power is applied:
This indicates that the limit switch wire harness is not connected to the circuit board. In this condition,
the operator will not run and the tone will continue until the fault is corrected. Check to be sure that
the limit switch plug is properly inserted into P2.
Constant tone is heard:
This indicates that the operator is in a hard shutdown condition (section 4.2.3). The tone will continue
to sound for five minutes, and then will beep once every five seconds. The operator-reset button
must be pressed or power must be removed and then reapplied to return the operator to normal
operation.
Short tone is heard every five seconds:
This indicates that the operator has been in a hard shutdown condition in excess of five minutes.
This will continue until the operator-reset button is pressed or until power is removed from the
operator.
Operator runs for 1 second and stops, two short tones are heard:
This indicates that there may be a fault with the current sensor circuit.
Page 46 9210-065-H-8-08