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Monobloc Outdoor Unit Installation Manual
12.0 Maintenance
Standard maintenance
To ensure optimal efficiency and reliability of the units, we recommend establishing a maintenance contract with
your local Service organisation. This contract will include regular inspections by Service specialists so that any
malfunction is detected and corrected quickly, ensuring that no serious damage can occur.
A Service maintenance contract is the best way to ensure the maximum operating life for your equipment
and, through the expertise of technicians, provides the ideal way to manage your system cost effectively. Air
conditioning equipment must be maintained by professional technicians, whilst routine checks can be carried out
locally by specialised technicians.
See the standard EN 378-4 or ISO5149.
All refrigerant charging, removal, draining and sampling operations must be carried out by a qualified
technician and with the correct material for the unit. Any inappropriate handling can lead to uncontrolled
fluid or pressure leaks.
CAUTION:
Before doing any work on the machine ensure that the power is switched off. If a refrigerant circuit is
opened, it must be evacuated, recharged and tested for leaks. Before any operation on a refrigerant
circuit, it is necessary to remove the complete refrigerant charge from the unit with a refrigerant charge
recovery group.
Simple preventive maintenance will allow you to get the best performance from your HVAC unit:
• improved cooling and heating performance
• reduced power consumption
• prevention of accidental component failure
• prevention of major time-consuming and costly interventions
• protection of the environment
There are five maintenance levels for HVAC units, as defined by the AFNOR X60-010 standard.
NOTE:
Any deviation or non-observation of these maintenance criteria will render the guarantee conditions for
the HVAC unit null and void, and the manufacturer, will no longer be responsible.
Level 1 maintenance
Simple procedures can be carried out by the user on a weekly basis:
• Visual inspection for oil traces (sign of a refrigerant leak),
• Air heat exchanger cleaning
• Check for removed protection devices, and badly closed panels,
• Check the unit alarm report when the unit does not work (refer RC end user manual),
• General visual inspection for any signs of deterioration,
• Verify the charge in the sight-glass.
• Regularly monitor the surface of the components to detect cavernous corrosion. To do this check an
uninsulated part of the pressure vessel or at a joint in the insulation.
Check that the water temperature difference between the heat exchanger inlet and outlet is correct.
