Chapter 5 - Troubleshooting Guide - Garnet SeeLevel II 900-D4S Single Manual

CHAPTER 5 - TROUBLESHOOTING GUIDE

T
here are only 5 serviceable components in the monitor: the
float, the sender bar, the interconnecting fibre optic cable, the
display, and the batteries. If the float is sunk, the display will read
the bottom tank reading all the time. If the float is partially sunk,
the reading may rise and then fall as the tank is filled. If the float
has lost its magnets, the reading on the display will show "noFL".
If the fibre is damaged or the sender bar is dead, the display will
read "no L". If the light level is poor due to a damaged or excessively
bent fibre, or if the fibre is not fully inserted, the display may show
bad light as "bL:xx" where xx is the number of bits received. If the
fibre optic cable is disconnected from the display, a flashing red
light should be visible from the end of the fibre.
If the display batteries are dead, the display will be dim or blank,
or read "no L" or "bL:xx", and the LCD backlight will not work.
If the display reads erratically, check for water inside the sender
head or display.
To test a sender bar:
1. Make sure the sender is flashing once every 2 seconds from
the optical connector. If not, replace the battery module. If
this doesn't help, the sender is dead and must be replaced.
2. If the sender is flashing, plug a piece of fibre into the sender
optical connector and the other end of the fibre into the
optical input of a display that is known to be good, the display
should show a volume value.
To test a display:
1. The display should show "no L" with no fibre connected, if not
then the display must be replaced. However, if the optical
input is exposed to ambient light the display may read "bd L"
or "Sun". The display may "hang up" or freeze if it is exposed
to a static shock or strong radio signals, it should automatically
reset within several seconds.
2. If the LCD works but not the backlight, check the batteries
and the battery holders. Make sure no corrosion or debris is
preventing contact. If the backlight still does not work, the
display must be replaced.
3. For other problems, plug the display into a bar that is known
to be good to see if it is operating properly.
900D4S Manual Page 19