429 / 516
FATC
42
Based on the values the following conclusions can be inferred and further troubleshooting can be done.
Low Pressure
side in kg/cm2
( M Pa)
High Pressure side
in kg/cm2 ( M Pa)
Remarks
Symptoms
Possible reason
1.5-2.5 (0.15-
0.25)
14-16 (1.37-1.57)
System pressure is
normal
Normal cooling
AC system working
normal
0.5-1.0 (0.05-
0.1)
7-10 (0.69-0.98)
Pressure low
Insufficient cooling
1. Refrigerant quantity
too small. 2. Gas
leakage.
Vacuum
5-6 (0.5-0.6)
Refrigerant fails to
circulate
No cooling experi-
enced
Clogging of AC cycle.
Initially 1.5-2.5
(0.15
-0.25)
and later vacu-
um
Initially
14-16
(1.371.57)and later
7-10 (0.69-0.98
Moisture present in
system.
Initially works nor-
mally but later no
cooing experienced
Freezing of expansion
valve due to presence
of moisture.
4-6 (0.4-0.6)
7-10 (0.69-0.98)
Pressure on low
pressure side is
high and pressure
on high pressure
side is low.
No cooling.
Compressor defective
2.5- 3.5( 0.25 –
0.35)
20-25 ( 1.95-2.45)
System pressure is
high.
Only
Insufficient
cooling.
Excessive refrigerant
in the system causing
insufficient condenser
cooling
Insufficient cooling
with low pressure
piping will be hot.
Air has entered the
system.
In sufficient cooling
with frost or large
amount of dew on
low pressure piping
TXV valve faulty