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7. MAINTENANCE OF THE UNIT
7.1 General warnings
Maintenance can:
•
Keep the equipment operating efficiently
•
Prevent failures
•
Increase the equipment life
It is advisable to maintain a record book for the unit which details all operations performed on the unit as this will facilitate trouble-
shooting.
Maintenance must be performed in compliance with all requirements of the previous paragraphs.
Use personal protective equipment required by regulations as compressor casings and discharge pipes are at high temperatures.
Coil fins are sharp and present a cutting hazard.
7.2 Drive access
Access to the unit once installed, should only be possible to authorized operators and technicians. The owner of the equipment is the company legal
representative, entity or person owns the property where the machine is installed.
They are fully responsible for all safety rules given in this manual and regulations.
7.3 Periodical checks
The start-up operations should be performed in compliance with all requirements of the previous paragraphs.
All of the operations described in this chapter MUST BE PERFORMED BY TRAINED PERSONNEL ONLY. Before commen-
cing service work on the unit ensure that the electric supply is disconnected. The top case and discharge line of compressor
are usually at high temperature. Care must be taken when working in their surroundings. Aluminium coil fins are very sharp and
can cause serious wounds. Care must be taken when working in their surroundings. After servicing, replace the cover panels,
fixing them with locking screws.
7.3.1 Every 6 months:
It is advisable to perform periodic checks in order to verify the correct working of the unit.
• Check that safety and control devices work correctly as previously described.
• Check all the terminals on the electric board and on the compressor are properly fixed.
• Periodically clean the mobile and fixed contacts of the contactors.
• Check that there are no water leaks from the hydraulic circuit.
• Check that the flow switch is working properly, clean the metallic filter installed on the water pipe.
• Clean draining pan and pipeline (monthly).
• Check the state of the finned battery, if necessary clean it with compressed air in the direction opposite to the air flow. If the battery is completely clogged,
clean it with a low pressure cleaner, being careful not to damage the aluminium fins.
• Check the mounting and balancing of the fans.
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