NorthStar Navigation 491 Section Four Troubleshooting and servicing, Status LED

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SECTION FOUR — Troubleshooting and servicing the 491

Common 491 installation problems

The status LED

Typical problems you may encounter either during or after the 491 installation process are outlined in Figure 12 on page 22 and Figure 13 on page 23.

In the 961/962, the diagnostics screen may also help pinpoint a problem.

The two-color LED located behind the 491’s front-panel STATUS window displays the unit’s current condition.

The LED presents the following information:

•solid green: System has power, self-test passed, and communicating with navigator.

•Flashing green: 491 is not communicating with the navigator.

•Red: Self-test failed

491 INSTALLATION MANUAL Revision A

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Contents Echo Sounder Installation Manual Page Table of Contents Page Welcome to the Northstar Section ONE IntroductionWho should read this manual Scope of this manual Installation considerations Safety considerations Section TWO Installing the transducerAirmar transducer elements Northstar-recommended transducersDo not mount the transducer Choosing a mounting locationHull thickness limits LWL Installing the transducerLWL Using anti-fouling paintDetail Cleaning a transducerPage Section Three Installing Section Three Installing Installation Manual Revision a Echo sounder system components with the Northstar 961/962 System components190 dia 360 dia MountingConnecting the 491 to the 961/962 WiringInterface cable connection from 961/962 to Cable connection between the 961/962Connecting the 491 to the 957/958 491-to-transducer connector pin wiring Connecting the 491 to a transducerTurning the 491 on Initial checkoutFor the 961/962 Setting up the echo sounder Installation test checklistTurning the 491 off For the 957/958/6000iStatus LED Section Four Troubleshooting and servicing961/962 echo sounder system troubleshooting 957/958/6000i echo sounder system troubleshooting Contacting Northstar Getting technical supportHearing from you Ordering replacement parts ServicingReturning a 491 for service 491 technical speciﬁcations Appendix a Technical speciﬁcationsON/OFF Cavitation Deadrise Echo sounder Fairing block Transducer GlossaryGlossary Installation Manual Revision a Index 491 Index Index Installation Manual Revision a