Endress+Hauser Liquiline Control CDC90, Operating Instructions Manual

Page: 99 / 118

Liquiline Control CDC90 Maintenance
Hauser 99
12.1.5 Cables, connections and power supply lines
Weekly Monthly Biannually
‣
Check the impermeability
of:
• Compressed air hoses and
connections,
• Pressurized water hoses
and connections
• Hoses and connections of
buffer and cleaner vessels
• Multi-hose connections at
control unit and assembly
1. If the assembly is
located in a damp
environment or
outdoors and you are
using analog sensors,
check the sensor plug-
in head for leaks or
moisture.
2. Check sensor cable for
damage, in particular to
the external insulation.
Sensor cables that have
become damp inside
must be replaced! It is
not enough to simply
dry them.
3. Check cable
connections for leaks.
1. Check if the interior and circuit boards
are clean, dry and free from corrosion.
If not:
• Clean and dry interior and circuit boards.
• In case of corrosion, replace the affected
circuit boards if necessary.
• Check the seals and couplings for leaks and
damage.
2. Retighten clamps.
3. If the assembly is located in a dry
environment and you are using analog
sensors, check the sensor plug-in head
for leaks or moisture.
Replacing the hoses
1. Rinse the system with water.
2. Replace hoses with hoses of the same diameter and length.
3. Attach hose labels to the new hoses.
4. Attach hoses to the relevant pilot valves, pumps, rinsing block and assembly.