User's Guide _______________________________________________________________________ 
198  __________________________________________________________________ M211107EN-C 
Replacing Transmitter Module FST102 
and Receiver Module FSR102 
1.  Open central compartment cover of the visibility sensor; see Figure 
53 on page 191. 
2.  Make sure that the AC (mains) power switch and the optional 
battery backup switch are switched off. 
3.  Disconnect the control cable. Use the special tool to unlock the 
connector. See Figure 59 below. 
 
 
 
 
 
 
 
 
   
Figure 59  Visibility Sensor Transmitter and Receiver 
Control Cables 
Control 
Control