System Standard Maintenance; Level 1 Maintenance - Carrier 30KAV-ZE Series Installation, Operation And Maintenance Instructions

10 - SYSTEM STANDARD MAINTENANCE

To ensure optimal efficiency and reliability of the units, we
recommend establishing a maintenance contract with your local
Carrier Service organisation. This contract will include regular
inspections by Carrier Service specialists so that any malfunction
is detected and corrected quickly, ensuring that no serious damage
can occur.
A Carrier Service maintenance contract is the best way to ensure
the maximum operating life for your equipment and, through the
expertise of Carrier technicians, provides the ideal way to manage
your system cost effectively.
Refrigeration equipment must be maintained by professional
technicians, whilst routine checks can be carried out locally by
specialist technicians (refer to the standard EN 378-4).
All refrigerant charging, removal and draining operations must be
carried out by a qualified technician and with the correct equipment
for the unit. Any inappropriate handling can lead to uncontrolled
fluid or pressure leaks.
IMPORTANT: Before performing any work on the unit ensure
it is deenergized. If a refrigerant circuit is opened, it must be
evacuated, recharged and tested for leaks. Before any
operation on the refrigerant circuit, it is necessary to remove
the complete refrigerant charge from the unit with a refrigerant
charge transfer unit.
Simple preventive maintenance will allow you to get the best
performance from your HVAC unit:
■ Improved refrigerating performance,
■ Reduced electricity consumption,
■ Prevention of accidental component failure,
■ Prevention of major time-consuming and costly work,
■ Protection of the environment.
There are five maintenance levels for refrigeration units, as defined
by the AFNOR X60-010 standard.
NOTE: Any deviation from or failure to observe these
maintenance criteria will render the guarantee conditions for
the refrigeration unit null and void, and will release the
manufacturer, Carrier SCS, from its liability.
The braces located at the back of the electrical cabinets (see
picture below) are provided to reinforce the machine structure
when being transported. Once the unit has been installed in its
operating location, they can be removed to facilitate any
maintenance operations which need to be performed in this area.
Braces
Position of the operator workstation :

10.1 - Level 1 maintenance

See Note above.
These simple procedures can be carried out by the user:
■ Visual inspection for oil traces (sign of a refrigerant leak).
■ Check for detached protective devices, and improperly closed
doors / covers.
■ If the unit does not operate, check its alarm report (see the
report in the SmartVu™ control manual).
■ Check the filter fouling level at the air vents in the electrical
box.
■ Check the correct operation on electrical box fans.
■ Check the fouling level at the exhaust air openings on the top
of the power cabinet (fouling, snow, sand, etc.).
■ Check for any general visible signs of deterioration.
■ Clean the air-cooled exchangers (see the dedicated chapter),
■ Verify that the temperature difference at the heat exchanger
inlet and outlet is correct,
■ Verify the refrigerant charge in the liquid line sight glass,
■ Check the anti-corrosion coatings.
■ Check if there is water on the surface of the evaporator, which
would be a sign of a defect in its isolation.
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