Repair Liquisys M CCM223/253
104 Endress+Hauser
10.3 Disassembling the field device
Please note the effects on the process if the device is taken out of service!
See the exploded drawing for the item numbers.
You require the following tools to disassemble the field device:
• Standard set of screwdrivers
• Torx screwdriver, size TX 20
Proceed as follows to disassemble the field device:
1. Open and remove the cover of the connection compartment (item 420).
2. Disconnect the supply terminal (item 270)) to de-energize the device.
3. Open the display cover (item 410) and release the ribbon cables (item 250) on the
central module side (item 50 to 100) .
4. To remove the central module (item 50) release the screw in the display cover (item
450 b).
5. Proceed as follows to remove the electronics box (item 230) :
6. Turn the screws in the housing base (item 450 a) by two revolutions to release them.
7. Then push the entire box backwards and remove it from above while making sure
that the module locks do not open.
8. Release the ribbon cables (item 250) .
9. Bend the module locks out and remove the modules.
10. To remove the docking module (item 240) remove the screws in the housing base
(item 450 c) and remove the entire assembly from above.
11. To remove the CI transmitter (item 110/120) on devices with a pH/mV input, bend
the shielding plate up.
12. Disconnect the connected strand (pH input, strand comes from the BNC connection
jack) and nip off the heads of the synthetic distance sleeves using a fine wire cutter.
13. Then remove the module from above.
To assemble, carefully push the modules into the guide rails of the electronics box and let
them engage in the side box noses.
It is not possible to mount the modules incorrectly. Modules inserted in the electronics
box incorrectly are not operable since the ribbon cables cannot be connected.
Make sure the cover seals are intact to guarantee IP 65 ingress protection.
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