Pontoon VRTT Thruster Manual ref 55110293 iss.4
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15
12 - Fault finding
The system will not turn on?
‣ Check heath LED on ICU, Replace ICU fuse / Reset circuit breaker
if not flashing
‣ Check battery cables to ICU
The Panel LED flashes Green then
goes to solid red, this means the
actuator movement has not been
completed in allowed time?
‣ Check down switch when thrusting in both directions
‣ Check wiring to actuator
‣ Check UP and DOWN switches are adjusted correctly
Thrusting in wrong direction?
‣ Change contactor wires on motor solenoid.
Fuse / Circuit Breaker keeps blowing?
‣ Wrong fuse fitted - check rating and replace.
‣ Water too shallow causing excessive load on raise/lower motor.
‣ Obstacle blocking tunnel from retracting.
Poor thrust or thrust in one direction
only?
‣ Batteries not large enough or charged, cables not recommended
size. Voltage at motor when running should be a minimum 10V.
‣ Blockage in tunnel/propeller jammed with debris, switch off main
power, inspect and clear.
‣ Propeller washers fitted wrong.
‣ Check motor brush springs are located properly, brushes should
have good contact with the commutator.
‣ Check down switch when thrusting in both directions
‣ Check D1 and D2 terminals are tight
Motor turns but no drive?
⚠ DO NOT continue to run thruster.
‣ Shear pin broken, remove 4 motor bolts, drive out old pin and
replace with new pin.
‣ Propeller blades broken. Replace with new.
Thruster noisy and vibrating?
‣ Check propeller is not touching the tunnel wall.
‣ Check hub height is correct.
Motor lowers, then raises (red fault)
⚠ DO NOT continue to run thruster.
‣ Something is blocking tunnel and it is not hitting limit switch in
15s
‣ Check lower limit switch cone position
