6.6. Check pressure at high pressure side
1.
Note :
a.
b.
2. Suitable pressure measurement, next action is :
A. Gas Leakage ( A area / B area ) ……………..Can not be repaired
B. Compression not perfect and clogged by solid substance ( C area )
Switch off the compressor then cut capillary pipe ± 35 mm from dryer outline. This action to
protect if clogged at cooling unit by refrigerant HFC-134a, then solid substance will collect
about ± 35 mm around dryer outline.
Install pierching plier with pressure gauge at discharge near compressor, then check pressure
from compressor running. If compressor stop, start compressor again about ± 5 minutes until
stable pressure, then check pressure.
Before measuring, make sure the pressure gauge at " 0 " position. If not at " 0 " position,
adjust the screw at pressure gauge.
Keep the gap from pierching plier about ± 4 mm by adjust screw at pierching plier.
Before release pressure gauge, catch point (1) and (2) with pierching plier. After pressure
gauge released, take pierching plier and cut point (3) and (4), then close again all pipe. This
action to keep the gas smell losing at atmosphere (HFC-134a will chemically reaction).
Area A
Area C
Area B
Normal
0
5
10
15
20
25 30
35
Sorrounding Temperatur [
o
C ]
P
re
s
s
u
re
[
k
g
f/
c
m
2
(b
a
r)
]
-1
0
2
4
6
8
10
12
14
16
18
Compressor
Inlet
Compressor
Dryer
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