Chapter 7 ___________________________________________________________ Troubleshooting
VAISALA______________________________________________________________________ 101
Table 23 CL31 Status, Miscellaneous Problems
Problem Reason Instructions
CL31 does not start, no
LEDs are lit
Power is not connected. Check that both the main and the
battery switches are in the ON
position. Check the presence and
correctness of the line voltage, and
make sure that the battery is OK.
Loose cable connection. Check the cable connections.
Laser on LED is not
blinking but the Status LED
is lit.
Operation mode is standby. Connect the maintenance terminal
and check if the operation mode is
normal.
CLE321 is damaged. Replace CLE321.
Data message is missing. Dialogue is not operating. Check the cable connections. Open
the terminal.
Wrong communication
parameters.
Check the communication
parameters (number of bits, parity,
etc.).
Wrong data port. Open the terminal program and give
open command and then get
params message command. Check
that the PORT is set to DATA.
Operation mode is standby. Open the terminal program and first
give the open command and then
the status command. Check that
the OPERATION MODE is
NORMAL.
Cloud detection is missing. Equipment failure. Open the terminal program and give
open command and then get
failure status command. Check the
alarms and warnings. If there are no
alarms or warnings in the data
message, contact Vaisala.
The capability to detect high
clouds is reduced.
Low receiver gain (no fog or
snow).
Check the automatic receiver gain
setting in the status message. If it is
low, check that the window is clean.
Check that the optical path is clear.
Visually check that the lens is clean.
Extensive amount of dirt or water
droplets on the window and a
failure in the diagnostics.
Check the window clarity. Check the
blower operation by giving the
service self_check command and
check that the blower works.
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