Chapter 8 ___________________________________________________________________ Repair
VAISALA ______________________________________________________________________ 101
8.
Push the new CLE311 board in such a way that it connects to
the back plane connector. Tighten the hand screws to lock the
position of the board.
9.
Connect the data line connector to the same position as it was
connected to on the previous board.
10.
Connect the CT3839 power cable.
11.
Switch the power on with all three switches. Wait until the
Laser on
LED starts blinking at 2-second intervals. Make sure
that all six diagnostic LEDs light up after the set-test. Refer to
Figure 19 on page 99.
The ceilometer unit should now return to normal operation. Verify
that the unit is working properly and that there are no other failures
with the system. If other failures exist, separate troubleshooting may
be necessary.
Replacing No-break Battery 4592
CAUTION
Servicing the equipment must only be performed by qualified
maintenance personnel.
The no-break battery should be replaced when it is damaged or can
otherwise no longer be recharged.
To replace the no-break battery, you will need a crosshead screwdriver
and a 3 mm Allen-key.
Then proceed as follows:
1.
Open the measurement unit door and switch the power off with
all three switches (F1, F2, and Battery). For the location of the
switches, refer to Figure 18 on page 98 and Figure 19 on page
99.
WARNING
Disconnect the CT3839 power cable before continuing!
2.
Disconnect the no-break battery cable from the CLE311 board.
3.
Remove the two screws locking the lid of the no-break battery
cage. One of the screws is located on top of the battery cage, the
other is on the left side near the top of the cage.
