Troubleshooting - TMQ AP4 Operation And Installation Manual

Troubleshooting

Note: Before carrying out any trouble shooting procedures, ensure your test
equipment is working correctly!!
AP4 does not switch on:
Possible fault

No power available at AP4

Defective power cable connection

Faulty Mode switch on AP4

Component failure in AP4 power regulator circuit
AP4 switches on but no drive output
Possible fault

No compass input

Defective drive cable connections

Failure of drive switching circuit in AP4 (FET's)

Defective MODE switch in AP4

FUS Displayed open Fuse Internal 15A Blade Fuse
AP4 working but rudder does not move
Possible fault

Defective drive connection cable

Worn drive motor brushes

Drive motor failure

Pump failure (hydraulic drive)

Air in hydraulic lines

Ram connection on tiller

Broken drive chain or cable (mechanical drive)

FUS Displayed open Fuse Internal 15A Blade Fuse
TMQ AP4 Autopilot (AP4S10) 60 of 62 Version 4.96 9/10/2017