CITROËN 2002 BERLINGO Technical Information page 318

CHECKING THE EFFICIENCY OF THE AIR CONDITIONING SYSTEM
High pressure
too low
High pressure
normal
High 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 PRESSURES (continued)
Low pressure
too low
- Insufficient fluid charge.
- Constriction of the HP system.
- Dirty pressure control valve.
- Faulty compressor.
- Dirty evaporator.
- Faulty pressure control valve.
- System blocked.
- Water in the system.
Low pressure
normal
- Cooling fan speed unsuitable.
- Faulty compressor.
- Circuit normal
- Presence of solid matter in the system.
- Dirty condenser.
315
ALL TYPES
Low pressure
too high
- Faulty pressure control valve.
- Faulty compressor.
- Cooling fan speed unsuitable.
- Excessive fluid charge.
- Dirty condenser.
- Faulty pressure control valve.
- Cooling fan speed unsuitable.