st5000 plus

[pirahna3]

Hi,
First time posting. I have a ST5000 plus autopilot. worked well up until putting the boat in the water 6 weeks ago. Had a pretty bad leaking steering cylinder so changed it as it had to be done and i thought air might be the problem.
The issue- when operating the auto pilot on standby or auto, it will only steer to starboard.
I have switched the drive polarity and it will then send it to port but not starboard. The - (minus) inputs are not responding.
-The rudder indicator is working and showing correctly
-Allthough I'm along side while doing these tests, i have set it to auto, and while inputting the minus in increments of 10, the compass reading on screen reflects the inputs. Then if i manualu steer to the port and go past the compass reading the auto will then energies the auto helm to correct back to starboard. but never to port
Any ideas???

[Chuck - Raymarine - Moderator]

Welcome to the Raymarine Forum pirahna3,

Based upon the symptoms and troubleshooting performed, it appears that the ST5000 (combines the functions of an autopilot control head and course computer within a single device) has suffered a failure of its circuitry. Unfortunately, Raymarine can no longer provide parts and service for the ST4000/ST4000+ and ST5000/ST5000+ autopilots. Accordingly, it would be necessary to replace the ST5000. Should the the ST5000 currently be interfaced to a Type 1 Hydraulic Pump, then it would be recommended that the ST5000 be replaced with a T70156 Evolution EV-200 Power (includes p70RS Autopilot Control Head, EV-1 Sensor Core, ACU-200 Actuator Control Unit, and SeaTalkng networking components to interface these autopilot components to one another). The current installed rudder reference transducer and Type 1 Hydraulic Pump may be retained for use with the new autopilot components.

[Radiozephyr]

Same thing happened to me last year. There's a guy in Colorado who fixed my ST5000+ unit for $187, which included return shipping. Send me a PM and I'll give you his email.

[Chuck - Raymarine - Moderator]

Noted.