CITROEN C5 2000 - Checking Pressures

AIR
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 high
Low pressure
normal
Low pressure
too high
Checking the pressure at temperatures between 15°C and 35°C for information only.
In general, the pressure should be approximately :
- for R134.a fluid, less than 2 Bars (Low pressure), and between 13 and 24 Bars (High pressure).
CHECKING THE EFFICIENCY OF THE AIR CONDITIONING SYSTEM