10.�
CHECKING COMPONENTS
10. Checking
C
omponents
10.1 Check
R
efrigerant
S
ystem
TEST SYSTEM FLOW:
Conditions:
①
Compressor is running.
The air condition should be installed in good ventilation.
Tool: Pressure Gauge Technique:
①
see
②
feel
③
test
See ----- Tube
D
efrost.
Feel ----- The
D
ifference between
T
ube’s
T
emperature.
Test ----- Test
P
ressure.
16
Cooling
M
ode
Test system pressure.
Is the low pressure
normal at service
part ?
The pressure on the
high side.
The pressure on the
low side.
Recharge refrigerant
after air purging with
the vacuum
pump. Is the low
pressure normal
over again?
Air remains at the
refrigerant system.
yes
The system needs
refrigerant.The
service people must
charge refrigerant.
Does the low pressure
rise ?
NO
Recharge
r
efrigerant.
yes
The refrigerant system is
blocked. Please check
the Capillary Tube
（
or electronic
expansion valve).
Is it blocked?
Unsolder the capillary tube
ASS'Y(or electronic expansion
valve).The capillary tube1 is blown
by N
2
.
Check check valve and 4-
way valve.
If the pressure is
close to static
pressure?
NO
NO
4-way valve collude or
compressor exhaust very
ebb.
yes
NO
yes
