The manifold pressure gauge for fault diagnosis (Dieselpartsworld) 2016-02-28    

The manifold pressure gauge for fault diagnosis of air conditioning system of automobile maintenance
Using Qi pipe pressure table detection and maintenance of automotive air conditioning is through the high and low pressure to determine the breakdown of the refrigeration cycle system, the following several groups of pressure, from fault form, there may be a fault and repair methods.
Generally the manifold pressure gauge of high and low voltage table are respectively connected on the maintenance valve of the compressor, the temperature in air for 30-35 DEG C, engine speed 1500-2000r/min, door open, fan speed is adjusted to high-grade, temperature is adjusted to the cold stalls, the normal system, the high pressure side of the pressure should be 1.4 ~ 1.6Mpa; low pressure side of the pressure is 0.15 to 0.25.
The normal range of R134a air conditioning system pressure:
Meter reading: low voltage side of 0.15 ~ 0.25MPa 1.4 ~ 1.6MPa high voltage side
I according to the different models, different test conditions, the pressure range is slightly different
After the outlet temperature is very low (about 5 minutes after the middle of the air outlet 2 to 8 DEG C, the reference data provided by the manufacturer.