Simrad H1000 Troubleshooting, Trouble shooting introduction, Uncalibrated, No rudder position

trouble shooting introduction

The pilot control unit is continually monitoring the h1000 pilot and h1000 system for correct operation. If an error is detected the pilot display will show an overlaid error message, and the system alarm buzzer will sound if connected. To silence the alarm press any of the keys on the pilot display or any h1000 display.

uncalibrated

fault description: Rudder not calibrated or memory has been corrupted.

check list:

1.Has rudder ever been successfully calibrated? ξ Yes, go to 4.

ξ No, go to 2.

2.Set rudder port and starboard positions. Move helm, does rudder indicator work? ξ Yes, go to 4.

ξ No, go to 3.

3.Rudder indicator will not work until port and starboard positions have been entered. The difference in the signal from the rudder reference unit at the port end stop and the starboard end stop must be at least 1.0V. Check rudder reference installation and then repeat 2.

4.If rudder has previously been successfully calibrated then fault is due to memory corruption. This may be due to memory backup battery failure, or severe interference; e.g. lightning.

5.Recalibrate pilot and contact the nearest B&G dealer for advice.

no rudder position

fault description: Signal from the rudder reference unit is outside the limits set during calibration.

check list:

1.Check installation of rudder reference unit for slack or loose fittings.

2.Check wiring and the signal from the rudder reference with a volt meter at the pilot computer terminals. The voltage supply to the rudder reference should be 4.5 to 5.0V (between red-blue). With someone moving the helm, the signal measured between (blue-green) should change smoothly. If the signal is incorrect, suspect a faulty rudder reference unit. Note, the difference between the signal voltages measured at the two end stops must be at least 1.0V.(e.g. blue –green voltage minus red -green voltage must be greater than 1.0V).

3.Set pilot display to show digital rudder angle in degrees. Move helm to port and starboard end stops, check that the indicated rudder angle is 40θ (+2θ). If not, check the rudder reference installation to determine and rectify the reason for the end stop position changing and then re- enter the end stop calibration values.

4.Move helm slowly from end stop to end stop. Check that indicated rudder angle counts from 40θ one side to 40θ the other side without "missing" a count.

5.If the fault is always at the same rudder angle, suspect a faulty rudder reference unit.

6.If the fault is at different rudder angles suspect a fault in the wiring, the connections to the pilot computer, or the pilot computer electronics.

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