Owners manual

TROUBLESHOOTING:
• Check with a voltmeter that voltage is present between Terminals J1, V+ and J1, V- (the
battery voltage).
• If no voltage is present, check that there is power to the breaker panel, and that the breaker
for the motor is turned on. Recheck the wiring from the breaker panel to the CT2 Drive Box.
• If voltage is present, use an ohmmeter to check the 30 AMP Fuse (F1). Check the 1 AMP
Fuse (F2) as well. If either is faulty, replace with the
same size fuse.
• If fuses are OK check the voltage between Terminal J1 (V-) and Terminal J2 (+5V) for the +5
volts from the Autopilot. Check that the voltage between Test Points TP3 and TP4 is between
12 and 13.5 volts. Check that the voltage between Test Points TP1 and TP4 is 15 to 20 volts
higher than the voltage between Terminals J1 (V+) and J1 (V-) (the battery voltage).
If all test voltages are correct, connect the Port or Starboard terminal (J2, STBD or J2, PORT)
momentarily to the battery negative terminal (J1, V-) - the motor should run.
• If the motor doesn't run:
1. If the motor is a Shunt Field or Compound Motor, check that full (within a volt) battery
voltage appears between J1, Field+ and J1, Field- when there is +5V between J2, +5V and
Test Point TP4. If there is no voltage, disconnect the field connection to the motor and
check for a short circuit between the field wire and motor leads, or for a nail or staple
through the cable.
2. Check that the full input voltage appears between the M1 and M2 terminals while the Port
or Starboard terminal is connected to the V- terminal. The polarity of the voltage will
depend on whether the Port or Starboard input is activated.
3. If the voltage is present the motor may be faulty. Connect the motor leads directly to the
battery briefly to confirm whether it runs in both directions. If it does not run, contact your
dealer or the supplier of the drive system for assistance. If it does run, the CT2 Motor
Controller may be faulty. Contact your Dealer or ComNav Marine for assistance.
4. If there is no voltage present the CT2 Motor Controller may be faulty. Contact your Dealer
or ComNav Marine for assistance.
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