Trouble Diagnosis; Recharging; Leakage Test; Cycle Check - LG GC-P207 Service Manual

TROUBLE DIAGNOSIS

Item

4. Recharging

• After the system is completely
process vacuumed, fill it with the refrigerant
R600a up to what has been
specified at your refrigerator Name
Plate.
• The amount of refrigerant (R600a)
must be precisely measured within
the error of ±2g by an electron
scale.
• Connect the charging hose (that is
connected to the refrigerant
(R600a) cylinder) to the Schrader
valve installed on the service tube.
• Then, charge the refrigerant (R600a) by controlling the Throttle valve.
• When you do so, do not fully open the Throttle valve because it may make
damage to the compressor.
• Gradually charge the refrigerant (R600a) by changing open and close the Throttle
Valve (5g at each time).
• The charging hose must use a one-way valve to prevent the refrigerant refluence.
• Close the Schrader valve cap after the refrigerant (R600a) is completely
recharged.
• If you use the manifold connected with both the refrigerant (R600a) cylinder and
the vacuum pump simultaneously, make sure the pump valve is close.
5. Leakage
• After you completely recharge the refrigerant (R600a), perform the leakage test by
Test
using a portable leakage detector or soapy water.
• Test the low pressure (suction) parts in compressor off time and high pressure
parts in compressor on time.
• If the leakages are found, restart from the refrigerant (R600a) discharging process
and repairs defects of leaks.
• After the leakage test, check the temperature of each parts of the cycle.

6. Cycle Check

• Check with hands if the CONDENSER and the case (HOT-LINE pipe) that is
contacted to the door gasket are warm.
• Confirm that frost is uniform distributed on the surface of the EVAPORATOR.
Precaution
FILLING OR VALVE TO BE OPENED
CHARGE TUBE WHEN REFILLING
TO THE REFRIGERATION
SYSTEM
TO THE VACUUM PUMP
- 124 -
REFRIGERANT
(R600a)
CHARGING HOSE
COUPLE
THEROTLE
VALVE
WEIGH SCALE
TO THE CHARGE
CYLINDER
VALVE TO BE CLOSED
AFTER VACUUM
Utilities
Refrigerant
Cylinder
Hoses
Portable
Leakage
detector