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11.2 - level 2 maintenance
This level requires specific expertise in electrical, hydraulic
and mechanical systems.
The frequency of this maintenance level may be monthly
or annual, depending on the verification type.
In these cases, the following maintenance operations are
recommended.
Carry out all level 1 operations, then:
•
At least once a year, tighten the power circuit
electrical connections (refer to the table
10.4 - Tightening torques).
•
Check and tighten all control/command connections,
if required (refer to the tightening torques table).
•
Check the differential switches for correct operation
every 6 months.
•
Remove the dust and clean the interior of the control
boxes, if required. Check filter cleanliness (if present).
•
Check the presence and the condition of the electrical
protection devices.
•
Replace the fuses every 3 years or every 15000 hours
(age-hardening).
•
Replace the control box cooling fans every 5 years.
•
Check the height of the anti-vibration mountings
(located between the compressor rails and the unit
chassis) after 5 years of operation, and then each year.
When the total minimum height of the mountings is
less than 25 mm replace the mountings
•
Verify the hydronic connections.
•
Purge the water circuit.
•
Clean the water filter (see chapter 7- "Water
Connections").
•
Check the unit operating parameters and compare
them with the previous inspection.
•
Keep and maintain a maintenance sheet, attached to
each HVAC unit.
•
Check, inside the control box, the presence of voltage
on the terminal connection of the cooler heaters and
drives (activate the quick test mode to energise the
heaters).
WARNING: For all these operations take adequate safety
measures: use appropriate PPE (personal protective
equipment), comply with all industry and local
regulations, use common sense.
11.3 - level 3 (or higher) maintenance
The maintenance at this level requires specific skills/
approval/tools and expertise. Only the manufacturer, his
representative or authorised agent are permitted to carry
out this work. These maintenance operations concern for
example:
•
A major component replacement (compressor, evapo-
rator)
•
Any intervention on the refrigerant circuit (handling
refrigerant)
•
Changing of parameters set at the factory (application
change)
•
Removal or dismantling of the HVAC unit
•
Any intervention due to a missed established mainte-
nance operation
•
Any intervention covered by the warranty.
11 - 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 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.
Air conditioning equipment must be maintained by profes-
sional technicians, whilst routine checks can be carried out
locally by specialised 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.
WARNING: 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
unit.
simple preventive maintenance will allow you to get the
best performance from your hVaC unit:
•
Improved cooling performance.
•
Reduced power consumption.
•
Prevention of accidental component failure.
•
Prevention of major time-consuming and costly inter-
ventions.
•
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,
Carrier France, will no longer be responsible.
11.1 - level 1 maintenance
These simple procedures can be carried out by the user:
•
Check for traces of oil (indicates a refrigerant leak).
•
Check for missing / damaged protective devices, and
improperly closed doors / covers.
•
Check and record alarms (see 30XAV-ZE control
manual)
•
Check the clogging state of filters of aeration openings
of the control box.
General visual inspection for any signs of deterioration.
