8.3.2
Dismantling of COM 253 F
• Before opening, make sure the instrument
is voltage-free.
• Open and remove the connection
compartment cover (Pos. 420).
• Pull out the mains terminal (item 470).
• Open the display cover (Pos. 410) and
loosen the ribbon cable (Pos. 310 / 320) on
the electronics box (Pos. 330).
• Removal of electronics box (Pos. 330):
Loosen screws (Pos. 450a) in the bottom of
the housing 2 revolutions, then slide entire
box backward and remove towards the top.
Make sure that the module catches do not
come unlatched while you push the
electronics box back!
• Now bend the module latches outward and
remove the module(s).
• Dismantling the controller (Pos. 40):
Loosen screw (Pos. 450b) in the display lid.
• Dismantling the docking module (Pos. 340):
Loosen screws (Pos. 450c) in the bottom of
the housing and remove entire module
towards the top.
• Removing the transmitter (Pos. 270 / 280):
Simply pull off the module towards the top.
8.3.3
Installation COM 253 F
• Insert the module(s) in the electronics box
guide rails carefully and latch into the
lateral lugs in the box.
• Incorrect assembly is not possible!
Modules inserted in the electronics box
incorrectly are not operable since the
ribbon cables cannot be inserted.
• Make sure that the cover gaskets are intact
since they are required to guarantee
protection class IP 65.
OM253FE8.CHP
Liquisys M COM 223 F / 253 F
Diagnostics and corrective maintenance
Hauser
63
