72ST600R Autopilot Control Unit
Chapter 9: Fault Finding
All Raymarine products are subjected to a comprehensive test
procedure prior to packing and shipping. In the unlikely event that a
fault does occur with your autopilot, the following check list should
help identify the problem and provide a cure.
The display is blank
• No power – check the fuse/circuit breaker.
The display shows “CODE - - - -” at power on
• The CodeLock code must be entered manually (see Chapter 4).
The displayed compass heading does not agree with the
ships compass
• The compass has not been corrected for deviation – carry out the
deviation and alignment procedures.
Vessel turns slowly and takes a long time to come on to
course
• Rudder gain too low.
Vessel overshoots when turning on to a new course
• Rudder gain too high.
The autopilot appears to be unstable in Track mode, or track-
holding is slow
• If tide speed exceeds 35% of boat speed, and boat speed is not
available via SeaTalk, change the Cruise Speed setting in Dealer
Setup from Auto (A) to the boat’s cruising speed.
The autopilot appears to be unstable on Northerly headings
in the Northern hemisphere and Southerly headings in the
Southern hemisphere
• Northerly/Southerly heading correction not set up.
Display shows CAL LOCK when entering calibration
• Calibration locked out – calibration protection feature is turned on in
Dealer Setup.
The autopilot will not “talk” to other SeaTalk instruments
• Cabling problem – make sure all the cables are connected properly.
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