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AIR
CONDITIONING
CHECKING THE EFFICIENCY OF THE AIR CONDITIONING SYSTEM
Aircon circuit diagnosis table
Principal problem Symptom Possible causes
Low pressure normal and high pressure too high Presence of air in the aircon circuit
Low pressure normal and high pressure too lowAircon pressostat defective
Evaporator sensor defective
Abnormal levels of pressure Low pressure too high and high pressure normal Aircon pressure reducer jammed open
Filtering and drying cartridge saturated or
Low pressure too low and high pressure normal clogged
Aircon pressure reducer iced up
Under cooling too weak Lack of aircon fluid
Air conditioning operating inExcess aircon fluid
back-up mode
Under cooling excessive Presence of air in the aircon circuit
Filtering and drying cartridge clogged
NOTE: In all cases, measure the excessive heating (SC)and the blow air temperature.
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Page 453 of 462
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AIR
CONDITIONING
(1)High pressure valve
(2)Low pressure valve
(3)Pressostat
(tighten to 0,6 m.daN)
(4)Aircon pressure reducer
(5)Filtering and drying cartridge
(6)Buffer capacity
«a»Outlet and inlet of the aircon pressure reducer, tighten to 0,8 m.daN
«b»Outlet and inlet of the aircon compressor, tighten to 0,7 m.daN
AIR CONDITIONING SYSTEM (R 134.a)
C5HP1BHP
Engines: ET3J4 - TU5JP4
C4
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Page 454 of 462
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CONDITIONING
448
(1)High pressure valve
(2)Low pressure valve
(3)Pressostat
(tighten to 0,6 m.daN)
(4)Aircon pressure reducer
(5)Filtering and drying cartridge
(6)Buffer capacity
«a»Outlet and inlet of the aircon pressure reducer, tighten to 0,8 m.daN
«b»Outlet and inlet of the aircon compressor, tighten to 0,7 m.daN
«c»and «d»Outlet and inlet of the aircon condenser, tighten to 0,6 m.daN
C5HP1BMP
AIR CONDITIONING SYSTEM (R 134.a)
Engine: EW10J4
C4
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Page 455 of 462
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CONDITIONING
449
(1)High pressure valve
(2)Low pressure valve
(3)Pressostat
(tighten to 0,6 m.daN)
(4)Aircon pressure reducer
(5)Filtering and drying cartridge
(6)Buffer capacity
«a»Outlet and inlet of the aircon pressure reducer, tighten to 0,8 m.daN
«b»Outlet and inlet of the aircon compressor, tighten to 0,7 m.daN
«c»and «d»Outlet and inlet of the aircon condenser, tighten to 0,6 m.daN
AIR CONDITIONING SYSTEM (R 134.a)
C5HP1BLP
Engines: EW10A - EW10J4S
C4
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Page 456 of 462
Downloaded from www.Manualslib.com manuals search engine AIR
CONDITIONING
450
(1) High pressure valve
(2)Low pressure valve
(3)Pressostat
(tighten to 0,6 m.daN)
(4)Aircon pressure reducer
(5)Filtering and drying cartridge
(6)Buffer capacity
«a»Outlet and inlet of the aircon pressure reducer, tighten to 0,8 m.daN
«b»Outlet and inlet of the aircon compressor, tighten to 0,7 m.daN
«c»and «d»Outlet and inlet of the aircon condenser, tighten to 0,6 m.daN
C5HP1BNP
AIR CONDITIONING SYSTEM (R 134.a)
Engine: DV6
C4
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Page 457 of 462
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CONDITIONING
451
(1)High pressure valve
(2)Low pressure valve
(3)Pressostat
(tighten to 0,6 m.daN)
(4)Aircon pressure reducer
(5)Filtering and drying cartridge
(6)Buffer capacity
«a»Outlet and inlet of the aircon pressure reducer, tighten to 0,8 m.daN
«b»Outlet and inlet of the aircon compressor, tighten to 0,7 m.daN
«c»and «d»Outlet and inlet of the aircon condenser, tighten to 0,6 m.daN
C5HP1BJP
AIR CONDITIONING SYSTEM (R 134.a)
Engine: DW10BTED4
C4
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AIR
CONDITIONING
(1)High pressure valve
(2)Low pressure valve
(3)Pressostat
(4)Dryer
NOTE:The method of connecting the High Pressure and Low Pressure compressor
pipes may vary according to engine type.
T
ightening torques (m.daN).
(a) : 0,8
(b) : 4 ± 0,4
XSARAAIR CONDITIONING SYSTEM (R 134.a)
C5HP16RP
Engines: TU3JP - TU5JP4 - EW10J4 - DV4TD - DW8B - DW10TD - DW10ATED
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AIR
CONDITIONING
(1)High pressure valve
(2)Low pressure valve
(3)High pressure clickfit union
(tool 8005-T.C)
(4) Low pressure clickfit union (tool 8005-T.A)
(5)Pressostat: 1,8 ± 0,6 m.daN
(6)Filtering/drying cartridge plug
T
ightening torques (m.daN).
a : 0,8.± 0,1
b : 0,5.± 0,1
c : 1,4 ± 0,2
d : 2,5 ± 0,25
XSARA PICASSO AIR CONDITIONING SYSTEM (R 134.a)
C5HP13PP
Engine: TU5JP+
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