31
• Clean the water lter (see chapter 7 “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.
See note below.
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,
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
NOTE: Any deviation or non-observation of these mainte-
nance criteria will render the guarantee conditions for the
HVAC unit nul and void, and the manufacturer, Carrier
France, will no longer be held responsible.
13.4.1 - Tightening torques for the main electrical connections
M10 L1/L2/L3 40
M12 L1/L2/L3 70
PE 70
Fuseddisconnect1034061/M10,customerconnection L1/L2/L3 40
Fuseddisconnect1034061/M12,Y/Doutlet QS10- 70
Fuseddisconnect3KL7141 QS10- 70
Fuseddisconnect3KL7151 QS10- 70
Contactor3RT104- KM- 5
Contactor3RT105- KM- 11
Contactor3RT106- KM- 21
Size 2 (3RB2966-) TI- 11
M12 Gnd 70
25
M12 1/2/3/4/5/6onEC- 23
M16 1/2/3/4/5/6onEC- 30
Gnd on EC- 25
Disconnectswitch3RV101- QM90- 2,5
Disconnectswitch3RV102- QM90- 2,5
Disconnectswitch3RV103- QM90- 4
Contactor3RT102- KM90- 2.5
Contactor3RT103- KM90- 4
Air conditioning equipment must be maintained by profes-
sional technicians, whilst routine checks can be carried out
locally by specialised technicians. See the standard
EN 378-4.
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 ve maintenance levels for HVAC units, as
dened by the AFNOR X60-010 standard.
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 30XA/30XW Pro-Dialog Plus
control manual).
• Check the clogging state of lters of aeration openings
of the control box.
General visual inspection for any signs of deterioration.
See note below.
This level requires specic know-how in the electrical,
hydraulic and mechanical elds. It is possible that these
skills are avail-able 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 lter 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 (if used) every
ve years.
• Check the water connections.
• Purge the water circuit (see chapter 7 “Water
connections”).
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