User's Guide ______________________________________________________________________
104 _________________________________________________________________ M210482EN-B
Replacing Window Blower CLB311-115 / CLB
311-230
CAUTION
Servicing the equipment must only be performed by qualified
maintenance personnel.
The window blower should be replaced if the ceilometer unit has been
generating warnings and alarms, and a malfunction with the operation
of the blower has been detected.
To replace Ceilometer Window Blower CLB311, you will need
a 5 mm Allen-key.
Then proceed as follows:
1.
Open the measurement unit door and confirm that there is an
active window blower failure. In case of a window blower
failure, the
CLB ok
LED will be turned off. Refer to Figure 19
2.
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!
3.
As the blower is attached to the shield of the ceilometer, you
will first have to remove the measurement unit from the shield
to get to the blower. To remove the measurement unit, loosen
the three attachment screws (marked A in Figure 5 on page 23)
on the back of the measurement unit, disconnect the blower
cable from connector J1 (see Figure 7 on page 25), and pull out
the unit.
4.
Use an Allen key to loosen the two screws on the side of the
window blower pull out the blower.
5.
Use the same Allen screws to attach the new window blower.
6.
Reattach the measurement unit by placing it inside the shield,
reconnecting the blower cable to connector J1, and tightening
the three attachment screws.
7.
Connect the CT3839 power cable.
