27
11 - STANDARD MAINTENANCE
Air conditioning equipment must be maintained by professional
technicians, whilst routine checks can be carried out locally by
specialised technicians.
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 interventions
• protection of the environment
There are ve maintenance levels for HVAC units, as dened by
the AFNOR X60-010 standard.
11.1 - Level 1 maintenance
See note below.
Simple procedure can be carried out by the user:
• Visual inspection for oil traces (sign of a refrigerant leak)
• Check for removed protection devices, and badly closed
doors/covers
• Check the unit alarm report when the unit does not work (see
report in the Touch Pilot control manual).
General visual inspection for any signs of deterioration.
11.2 - Level 2 maintenance
This level requires specic know-how in the electrical, hydronic
and mechanical elds. It is possible that these skills are available
locally: existence of a maintenance service, industrial site,
specialised subcontractor.
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 (see tightening torques table).
• Check and re-tighten all control/command connections, if
required (see 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 the lter condition.
• Check the good operation of the air pressurization detection
function of the electrical cabinet.
• 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 fan every ve years
• Check that control box ventilation system is not obstructed:
this shall include the fresh air duct as well as the air lters
located on the control box and at the entry of the duct.
• Check the water connections.
• Purge the water circuit (see chapter 8 “Water connections”)
• Clean the water lter (see chapter 8 “Water connections”).
• Check the unit operating parameters and compare them
with previous values.
• Keep and maintain a maintenance sheet, attached to each
HVAC unit.
All these operations require strict observation of adequate safety
measures: individual protection garments, compliance with all
industry regulations, compliance with applicable local regulations
and using common sense.
11.3 - Level 3 (or higher) maintenance
The maintenance at this level requires specic skills/ approval/
tools and know-how and only the manufacturer, his representative
or authorised agent are permitted to carry out these operations.
These maintenance operations concern for example:
• A major component replacement (compressor, evaporator)
• 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 maintenance
operation
• Any intervention covered by the warranty
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 held responsible
To Next Page
Loading...
