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Blink codes on a GHP 10 Autopilot's ECU
The Electronic Control Unit (ECU) has a status LED that indicates the current status of the ECU.
A Red blinking light indicates that the ECU has just been turned on and is running its initial boot block code.
A Green fast blinking light indicates that the ECU has an older version of software than the Course Computer Unit (CCU) and that the CCU is currently updating the software version installed on the ECU.
A Green slow blinking light indicates that the software of the ECU and CCU match and the CCU has commanded the ECU perform its normal operation.