411, 611 & 325 OCU
User Manual
21
9M02-8999-A001-EN
8 OCU Maintenance
8.1 Built in Reliability
The 411, 611 and 325 series of OCUs and associated MCUs have been designed to be highly reliable by
incorporating many features such as RF antenna diversity, high performance radios, built in fault tolerance that
will safely isolate any faults if possible and self-clearing in the event of a transient fault, (these will still be logged)
so users can expect superior reliability.
8.2 Maintenance Personnel
Unless customer technicians have received formal maintenance training from Cattron, the safe and approved
maintenance philosophy is that faulty OCUs or MCUs should be returned to an authorized facility for repair. This
ensures that safety and reliability are maintained at the required level.
Note:
When returning an OCU for repair, make a note of the serial number so that the OCU configuration
may be retrieved for any spare OCUs that need to be programmed.
8.3 Preventative Maintenance
Preventive on-site maintenance is extremely important to ensure system safety and longevity, the following items
are recommended:
Daily Visual Inspection:
o
Before use, visually inspect the OCU for cleanliness, physical damage and security of external parts
(screws, battery cover, switches, etc.).
o
Regular visual inspections not only mean quickly locating a source of potential problems, but also
may prevent serious problems from developing later.
Cleaning the OCU:
o
If necessary, the OCU should be cleaned with a moist cloth and a mild soap solution and then wiped
dry with a clean paper towel. Do not immerse the OCU in water and do not use any alcohol-based or
oil-based solvent cleaners
—these could damage the housing.
Functional Check:
o
After maintenance or repair, carry out a functional check to ensure the correct machine is under
control and that all functions are working correctly.
Mission Time
o
The OCU mission time (between major service or replacement) is expected in a normal heavy
industrial environment to be about 5 years. Examination of the Totalizer logs should be made at least
annually, if the number of switch activations has exceeded 1 Million operations, we recommend that
the unit be returned for a switch assembly replacement before the projected switch life of 2 million
operations is reached.
