Pressure And Temperature Of Refrigerant; Trouble Finding By Pressure/Temperature - Hyundai HSH-I073NBE Service Manual

2.1.2 Pressure and temperature of refrigerant

Capillary Tube
The pressure in normal condition shows the figure in the right side
table, but the pressure (P1) of high pressure side tube is affected
greatly by the temperature change and about 16kg/cm
temperature condition (indoor/outdoor 21°C).
The pressure fluctuation is affected by the tube length or insulation
as well as temperature change, so measure the pressure (P
pressure side for the trouble shooting of refrigerant system.
Pressure
(than normal)
Higher
Lower
Note) The high/low temperature is a figure converted into pressure.
The low pressure is normally 4.5-6.0kg/cm
(Temperature is normally 3°C-10°C.)
Air Conditioner Service Manual
High pressure (Liquid side)tube
Low pressure(Gas side) tube
<Trouble finding by pressure/temperature>
Temperature
(than normal)
Bad compression:
Compressor failure, Bad revers-
Higher
ing Valve
Normal
Higher
P
1
P
2
Accumulator
.G in a low
2
) of low
2
Cause
Cooling load is small.
Liquid refrigerant suction:
Excessive refrigerant charging
Gas short : Gas leak
Closed : Pipe internal
G.
2
70
Compressor
Measuring place Pressure(kg/cm
P1
P2
Explanation
Current flows weakly.
Current flows weakly.
High pressure is not
increased rapidly in early
running stage.
Current is low.
Current is low.
G)
2
About19.5
About 5.0