DOCS-001 Manual, SeaBotix Inc. Users, 150 – 200 Series - Rev B – 27 Jan 10 -
Page 48 of 64
-A color video image appears on the monitor (from camera #1), and an overlay message, “SeaBotix
LBV 150 (300, 1500)”, briefly appears on screen. This message is replaced by the standard overlay
as described in the LBV User’s Manual.
-The overlay should appear so that the following conditions are met: Up, Down and Horizontal
Thruster Gains all display “5”. The heading display indicates a valid value (0-360; does not read 777).
The date/time stamp is correct and counting. The depth reading is approximately 0 (+/-20MS; does
not read 777.7), and the temperature reading is stable (not -9 deg C). These conditions indicate a
loss of internal communications between the Motherboard and the sensor board
-The LBV shows the following indications: The green Motherboard communication LED’s are flashing
@ 2 Hz, The Motherboard red 12 VDC and 5 VDC power LEDs are continuously lit (with no flicker).
-The user is able to operate all LBV functions, i.e.: Operate thrusters in all directions, tilt the camera
chassis, select and focus cameras, operate lamps, open/close grabber, etc.
5.5
Failure Modes
Symptom:
No video and no LBV control
This mode is usually accompanied by alternate flashing of the CC Auto head and depth LEDs. OCU
power LED is lit.
Fault:
The SPS is not supplying 360 VDC.
Cause:
GFI has been tripped due to an insulation failure in the SPS, tether or LBV. The
SPS amber LED flashes one long pulse and two short pulses. All Motherboard LEDs
are unlit.
Fault Isolation:
Unplug the tether from the LBV and energize the LBV as
normal.
Check for 360 VDC between pins 1-3 & 2-3 at the LBV end of the tether. If 360
VDC is present, the fault is in the LBV (See “LBV Power Failure Section”). If it is
absent and the SPS amber LED is still flashing the one long, two short error
code, unplug the tether from the SPS and energize the LBV as normal. If the
SPS amber LED is still flashing the above error code, the fault is in the SPS (See
“SPS Power Failure Section”). If the amber LED is in the proper operating
condition, the fault is in the tether (See ‘Tether Failure Section’).
Cause:
The SPS 360 VDC turn on circuit is not operating. DC voltage readings at the
LBV end of the tether (between pins 1 & 3) are more than 0, but less than 300 VDC.
LBV Motherboard power LEDs are continuously unlit.
Fault Isolation:
The SPS board (inside the SPS) is faulty (See ‘SPS Power
Failure Section’).
