Garmin GSD 21 Installation Instructions - Page 11

INSTALLATION INSTRUCTIONS Blink Codes When the unit is installed, it switches on when the display unit is powered on (or the GSD remote power line is pulled low, with power applied). The two-color (Green/Red) LED on the GSD 21 indicates the current operational status of the module. Codes are: Code Green blinking, on for 1 second, off for 1/2 second (slow blink) Red blinking, on for 1 second, off for 1/2 second (slow blink) Solid Red (no blink) Red blinking, on for 1/10 second, off for 1/10 second (very fast blink) Status GSD 21 is servicing one directly wired connection and the display device is operating properly. The user should see sonar data on the display unit. GSD 21 is powered on but is waiting to connect to a display device. In this state, the GSD 21 does not transmit any sonar signals and is not sending out any sonar information to display units. If a display unit is connected and this code persists, check the wiring. Software failure - Call Garmin Product Support. If the cause is a software error, the display unit can show the error. Power must be cycled to clear the error. System alarm. The display device gives a message indicating the type of failure. After the alarm condition is fixed, power must be cycled on the GSD 21 to clear the alarm. GSD 21 Sonar Module 9