DOCS-001 Manual, SeaBotix Inc. Users, 150 – 200 Series - Rev B – 27 Jan 10 -
Page 46 of 64
any of the external equipment) will remove supply voltage from all external equipment.
This feature prevents damage to the entire LBV system.
The high DC voltage from the surface allows for relatively low current on the tether,
greatly reducing its overall cross sectional diameter. Designed into the power system is
GFI circuitry that will de-energize the 360 VDC at the Surface Power Supply.
Communication (which takes place between the operator control unit and the LBV
through the Surface Power Supply) is coupled onto the 360 VDC power lines and is
transmitted to and from the LBV. Within the LBV, communication is controlled by the
Motherboard which effectively addresses each modular component (For example: port
thruster, sensor board, external light, tilt motor etc.).
5.3
Troubleshooting Aids
The following pictures show various components of the LBV system. Please refer to
these when troubleshooting. It will also be helpful to utilize a digital multimeter for some
of the checks required. Please remember that at no time should any component be
plugged in or unplugged while the SPS, ICC or LBV is energized during fault diagnosis.
Motherboard Communications LEDs
(Normally flashing green)
Motherboard 12 VDC & 5 VDC Power
LEDS
(Normally solid red)
