LG LM-1860HL Service Manual ▷ View online
2. To remove the Control Box.
• Remove 2 or 4 securing screws.
• Pull the control box out from the chassis
carefully.
3. To remove the Discharge Grille.
• Remove the securing screw.
• Pull the discharge grille out from the chassis
carefully.
4. To remove the Evaporator.
- 39 -
• Unhook the tab on the left inside edge of the
chassis by pressing it outwards and at the same
time, slightly pull the evaporator until the tab is
clear of the end-plate.
time, slightly pull the evaporator until the tab is
clear of the end-plate.
• Remove the evaporator from the chassis
carefully.
• Unhook the tab on the right inside of the chassis
at the same time, slightly pull the evaporator
toward you until the tab is clear of the slot.
toward you until the tab is clear of the slot.
5. To remove the Cross-Flow Fan
• Loosen the screw securing the cross-flow fan to
the fan motor (do not remove).
• Pull the left end of the cross-flow fan with the
self-aligning bearing out the groove.
• Remove the cross-flow fan by sliding it out from
the shaft of fan motor.
6. To remove the Fan Motor
• Pick it up from the groove.(Do not remove a
black rubber as a spacer.)
- 40 -
Pull
Evaporator
End Plate
evaporator
Tab
Tab
Pull
Evaporator
Cross-flow fan
Bearing
Cross-flow fan
Fan motor
Screw
Service Valve
3-way Valve (Liguid Side)
3-way Valve (Gas Side)
Works
Shaft position
Service port
Shaft position
Service port
Shipping
Closed
Closed
Closed
Closed
(with valve cap)
(with cap)
(with valve cap)
(with cap)
Air purging
Closed
Open
Closed
Open
(Installation)
(clockwise)
(with charging cylinder)
(push-pin)
Operation
Open
Closed
Open
Closed
(with valve cap)
(with cap)
(with valve cap)
(with cap)
Pumping
Closed
Closed
Open
Open
down
(clockwise)
(with cap)
(counter-clockwise)
(connected
(Transfering)
manifold gauge)
Evacuation
Open
Closed
Open
Open
(Servicing)
(with cap)
(with charging cylinder)
Gas charging
Open
Closed
Open
Open
(Servicing)
(with cap)
(with charging cylinder)
Pressure check
Open
Open
Open
Open
(Servicing)
(with cap)
(with charging cylinder)
Gas releasing
Open
Closed
Open
Open
(Servicing)
(with cap)
(with charging cylinder)
- 41 -
3-way Valve
1.
2.
3.
4.
5.
6.
Flare nut
Structure
Hexagonal wrench
(4mm)
(4mm)
Open position
Pin
Flare nut
Service port
Service
port cap
port cap
Top
piping
connection
piping
connection
Pin
Open position
Closed position
Closed position
Service
port
port
Service
port cap
port cap
To
piping
connection
To outdoor unit
To outdoor unit
Valve cap
1. Air purging
Required tools: Hexagonal wrench, adjustable
wrench, torque wrenches, wrench
to hold the joints, and gas leak
detector.
to hold the joints, and gas leak
detector.
The air in the indoor unit and in the piping must be
purged. If air remains in the refrigeration pipes, it
will affect the compressor, reduce to cooling capac-
ity, and could lead to a malfunction.
purged. If air remains in the refrigeration pipes, it
will affect the compressor, reduce to cooling capac-
ity, and could lead to a malfunction.
- 42 -
Lo
R22
Service port nut
Be sure, using a torque wrench to tighten the service port nut (after using the service port), so that it prevents
the gas leakage from the refrigeration cycle.
the gas leakage from the refrigeration cycle.
• Procedure
(1) Confirm that both the liquid side valve and the
gas side valve are set to the closed position.
(2) Connect the charge set and a gas cylinder to
the service port of the liquid side valve.
- Leave the valve on the gas cylinder closed.
(3) Check for gas leakage.
- Open the vlaves on the gas cylinder and the
change set, wait 10 seconds, and then set it to
closed position.
- Check the flare connections for gas leakage.
(4) Air purging
- Open the valves on the gas cylinder and the
charge set.
- Using the Hexagonal wrench to press the gas
side valve's core pin, discharge for three
seconds and then wait for one minute. Repeat
this three times.
seconds and then wait for one minute. Repeat
this three times.
(5) Discharge the refrigerant.
- Close the valve on the gas cylinder and dis-
charge the refrigerant until the gauge indicates
0.5 to 1 kg/cm
0.5 to 1 kg/cm
2
.G.
(6) Disconnect the charge set and the gas cylinder,
and set the liquid side and gas side valves to
the open position.
the open position.
- Be sure to use a hexagonal wrench to operate
the valve stems.
(7) Set the both liquid and gas side valves to open
position with the Hexagonal wrench for the unit
operation.
operation.
(8) Apply steps from 1 to 7 to each (A-unit, B-unit)
by the same method.
Caution
Remember that outdoor unit does not contain
the refrigerant for air purge when you purge the
air, you should charge your refrigerant (or pur-
chased) by use of the gas cylinder and charge set.
If gas leakage are discovered in step 3 above, take
the following measures:
the refrigerant for air purge when you purge the
air, you should charge your refrigerant (or pur-
chased) by use of the gas cylinder and charge set.
If gas leakage are discovered in step 3 above, take
the following measures:
If the gas leaks top when the piping connections
are tightened further, continue working from step 4.
If the gas leak do not stop when the connections
are retightened, repair the location of the leak, dis-
charge all of the gas through the service port, and
then recharge with the specified amount of gas
from a gas cylinder.
are tightened further, continue working from step 4.
If the gas leak do not stop when the connections
are retightened, repair the location of the leak, dis-
charge all of the gas through the service port, and
then recharge with the specified amount of gas
from a gas cylinder.
Indoor unit
Liquid side
Gas side
CLOSE
OPEN
Gas cylinder
Closed
Closed
Outdoor unit
3-way
valve
3-way
valve
Click on the first or last page to see other LM-1860HL service manuals if exist.