2004 DACIA SUPERNOVA climate control

HEATING
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DISMOUNTING
Disconnect the battery.
Drain the cooling system.
Dismount the attachment
collar of the hoses
on the heating radiator. Clog the hoses of the he ating radiator by
means of the device MOT 453.
Dismount the documents compartment.
Dismount the central console.
Dismount the control climate control.
Disconnect the airflow pipes from the climate
control unit. Dismount the nuts and the attachment screws
of the climate control unit from the carriage body.
Release the climate control unit.
REMOUNTING
Perform in the reverse order the dismounting operations.
HOUSING MANIFOLD
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HEATING
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HEATING RADIATOR
R
EMONTARE
Se efectueazã în ordine inversã opera
iei de demontare.
În cazul deteriorãrii garniturilor, ele se vor înlocui. DISMOUNTING
Disconnect the climate control unit.
Dismount the attachment clips and release the
left- right cases.
Release the heating radiator.
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HEATING
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61 - 4
DISMOUNTING
Release
the climate maintenance assembly from under the dashboard, dismounting beforehand
the central console, the documents compartment, the lower casing, the dashboard. Unscrew the attachment screws of the turbine deflector.
Unscrew the attachment screws of the blower.
Disconnect the blower from the blower wiring.
REMOUNTING
Perform in the reverse order the dismounting operations.
C
LIMATE CONTROL BLOWER
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AIR CONDITIONING
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Basically, the air conditioning unit is formed of a closed circuit, composed by the following main
elem ents:
- ev aporator
- compre ssor
- c ondenser
- thermo static expansion valve
- conn ection pipes.
The evaporator is the component that ex t racts the heat from the passengers compartment and
is generally placed in the passengers compartment. In order to cool the passengers compartment
the hot air must be absorbed, the heat extracted and the “cooled” air redistributed. The hot air is
pa ssing through the evaporator to who is giving part of the temperature reducing so, its own
temperature. The cooled air is so conveyed in the passengers compartment, progressively reducing
the temperature.
In the same time, the refrigerant fluid which goes into the evaporator, is absorbing the heat, from
ai r pa ssing through the evaporator and at the same temperature, is transforming it from liquid into
va pors. At the evaporator exit, the refrigerant fluid is in vapor condition.
The evaporator is placed in the climate control unit and is protected by cases.
EVAPORATOR
EVAPORATOR CASES ASSEMBLY REPLACEMENT
DISMOUNTING
Disconnect the battery.
Drain the refrigerant circuit.
Dismount the sealing gaskets on the climate box outliner.
Dismount the thermostatic expansion valve.
Dismount the climate case locking plate.
Di sconnect the pipes evaporator – compressor and evaporator – tank filter.
Dismount the evaporator cases attachment nuts, on the right side.
Release the evaporator cases.
Replace the assembly .
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AIR CONDITIONING
62
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REMOUNTING
Perform the dismounting
operations in the reverse order.
Fill the refrigerant circuit and check the good operation of the climate control system.
NOTE
Ensure that evaporator finned plates are not deformed and they are not excessive
dirty.
The tightening nuts for the climate and conditioning assembly, the connections for piping,
condenser and filter tank, must have the following tightening moments:
- thread 3/4” – 16 pitch/l” – at t he moment 18-20 Nm;
- thread 5/8” - 18 pitch/l” – at the m oment 14-20 Nm.
The tightening moment of the compressor flange attachment screw -12+/-1,2 Nm.
The tightening moment of the thermostatic probe attachment screw -5,7+/-0,5 Nm.
The tightening moment of the pressure capture - 20,7+/-2 Nm.
NOTE
After each operation that implies t he disconnection of t he battery, at its reconnection,
introduce the radio code that is written on the vehicle-selling invoice. EVAPORATOR
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AIR CONDITIONING
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The compressor is absorbing the vapors coming from the evaporator at low pressure and
temperature, is compressing them and convey the gas at high temperature and pressure. The refrigerant fluid in high pressure and temperature vapor condition is entering in the second
he at exchanger, which by condensation is transmitting the heat to the external environmental.
At the exit from the condenser, the refrigerant fl uid is in liquid condition, at a high pressure and temperature.
Type of compressor: SD 7Y15
Compressor oil : PAG SP 10 or SP20, volume –135 cmc.
Refrigerant: HFC 134 a, quantity of refrigerant : 0.590 kg
C OMPRESSOR REPLACEMENT
DISMOUNTING
Disconnect the battery.
Drain the refrigerant circuit.
Disconnect the compressor’s connection.
Disconnect the pipes from the compressor.
Dismount the belt tensioning screw and release the belt.
Dismount the compressor attachment screws.
Dismount the compressor.
Replace the compressor.
REMOUNTING
Perform in the reverse order the dismounting operations.
T ension the belt and tighten at the required moment the tightening attachment screw.
Fill the refrigerant circuit and check the good operation of the climate control system.
COMPRESSOR
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AIR CONDITIONING
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CL
IMA TE CONTROL UNIT REPLACEMENT
DISMOUNTING
Disconnect the battery.
Release t he lateral and central console.
Disconnect the wires from the dashboard wiring.
Disconnect the distribution flow flap control cables and the mixing flow flap from the control
lever and the recycling flow flap cable from the climate control panel.
Disconnect the air flow pipes.
Dismount the screws from the front side of the climate box.
Dismount the nuts from the welded screws in the backside of the climate box.
Release the climate control unit.
Replace the climate control unit.
REMOUNTING
Perform in the reverse order the dismounting operations.
CL
IMA TE CONTROL UNIT
AIR INLET ASSEMBLY REPLACEMENT
DISMOUNTING
Dismount the sealing gaskets on the climate box outliner.
Dismount the climate box locking plate.
Dismount the nuts from the right side of the climate box.
Release the air inlet assembly .
Replace the assembly .
REMOUNTING
Perform in the reverse order the dismounting operations.
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AIR CONDITIONING
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Defective cooling
Is climate
blower working ?
Check the bl ower fuse and relay.
Are they defective?
Supply the blower motor
at (+12 V).
D oes it works?
Replace the climate control
switch or repair the electric
circuit.
Replace them
No
Ye s
Ye s
Change
blower.
No
No
Adequate air flow ?
Check t he a irflow fl aps
operation and the air ducts
integrity.
Compressor belt tensioning is good?
Yes Ye s
No
Any refrigerant fluid leakage
in the system ?
No
Ye s
Ye s
Is compressor clutch supplied with (+ 12 V)?
No
Ye s N o
Clutch is coupling the
compressor?
Replace the therm ostatic
expansion valve.
Ye s
No Check the electri c circ uit
for supplying and control.
Detect th
e refri ge ra nt fl ui d
leakage cause . Perform refilling.
Pressure controller is working?
Replace it.
Reface
i tensiunea curelei
Replace it.
No
Ye s DIAGNOSIS
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