Page 255 of 259
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CONDITIONING
252
CHECKING PRESSURES (continued)
Low pressure
too low
- Insufficient fluid charge.
- Constriction of the HP system.
- Dirty pressure control valve.- Cooling fan speed unsuitable.
- Faulty compressor.- Faulty pressure control valve.
- Faulty compressor.
- Faulty compressor.
- Dirty evaporator.- Circuit normal. - Cooling fan speed unsuitable.
- Faulty pressure control valve.
- System blocked.
- Water in the system.- Presence of solid matter in the
system.
- Dirty condenser.- Excessive fluid charge.
- Dirty condenser.
- Faulty pressure control valve.
- Cooling fan speed unsuitable. High pressure
too low
High pressure
normal
High pressure
too highLow pressure
normalLow pressure
too high
Checking the pressure at temperatures between 15°C and 35°C for information only.
In general, the pressure should be approximately :
- forR134.afluid, less than 2 Bars(Low pressure), and between 13and 24 Bars(High pressure).
CHECKING THE EFFICIENCY OF THE AIR CONDITIONING SYSTEM
Page 256 of 259
Downloaded from www.Manualslib.com manuals search engine C5HP15QP
AIR CONDITIONING SYSTEM R 134.a
Engines : 6FZ - RFN - RLZ
(1)High pressure valve.
(2)Low pressure valve.
(3)Pressostat.
(4)Capacity.
(a) Condenser bracket
Tighten to 0,8 m.daN
(b)Pressure control valve
Tighten to 0,8 m.daN
(c)Compressor bracket
Tighten to 2,5 ± 0,1 m.daN
(d) Condenser dryer reservoir
Tighten to1,4 ± 0,2 m.daN.
AIR
CONDITIONING
253
Page 257 of 259
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CONDITIONING
254
C5HP15RP
AIR CONDITIONING SYSTEM R 134.a
Engine : XFX
(1)High pressure valve.
(2)Low pressure valve.
(3)Pressostat.
(4)Capacity.
(a) Condenser bracket
Tighten to 0,8 m.daN
(b)Pressure control valve
Tighten to 0,8 m.daN
(c)Compressor bracket
Tighten to 2,5 ± 0,1 m.daN
(d) Condenser dryer reservoir
Tighten to1,4 ± 0,2 m.daN.
Page 258 of 259
Downloaded from www.Manualslib.com manuals search engine C5HP15SP
AIR CONDITIONING SYSTEM R 134.a
Engines : RHY - RHZ
(1)High pressure valve.
(2)Low pressure valve.
(3)Pressostat.
(4)Capacity.
(a) Condenser bracket
Tighten to 0,8 m.daN
(b)Pressure control valve
Tighten to 0,8 m.daN
(c)Compressor bracket
Tighten to 2,5 ± 0,1 m.daN
(d) Condenser dryer reservoir
Tighten to1,4 ± 0,2 m.daN.
AIR
CONDITIONING
255
Page 259 of 259
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CONDITIONING
256
C5HP15TP
AIR CONDITIONING SYSTEM R 134.a
Engine : 4HX
(1)High pressure valve.
(2)Low pressure valve.
(3)Pressostat.
(4)Capacity.
(a) Condenser bracket
Tighten to 0,8 m.daN
(b)Pressure control valve
Tighten to 0,8 m.daN
(c)Compressor bracket
Tighten to 2,5 ± 0,1 m.daN
(d) Condenser dryer reservoir
Tighten to1,4 ± 0,2 m.daN.
