LG LS-J0961NL Service Manual ▷ View online
3. Evacuation
(All amount of refrigerant leaked)
• Procedure
(1) Connect the vacuum pump to the charge set’s
center hose
(2) Evacuation for approximately one hour.
– Confirm that the gauge needle has moved
toward -76 cmHg (vacuum of 4 mmHg or
less).
less).
(3) Close the valve (Lo side) on the charge set,
turn off the vacuum pump, and confirm that
the gauge needle does not move (approxima-
tely 5 minutes after turning off the vacuum
pump).
the gauge needle does not move (approxima-
tely 5 minutes after turning off the vacuum
pump).
(4) Disconnect the charge hose from the vacuum
pump.
– Vacuum pump oil.
If the vacuum pump oil becomes dirty or
depleted, replenish as needed.
depleted, replenish as needed.
Lo
Open
Open
Vacuum pump
2-Way
valve
valve
Outdoor unit
Liquid side
Indoor unit
Gas side
3-Way
valve
valve
CLOSE
OPEN
-49-
4. Gas Charging
(After Evacuation)
• Procedure
(1) Connect the charge hose to the charging
cylinder.
– Connect the charge hose which you dis-
connected from the vacuum pump to the
valve at the bottom of the cylinder.
valve at the bottom of the cylinder.
– If you are using a gas cylinder, also use a
scale and revers the cylinder so that the
system can be charged with liquid.
system can be charged with liquid.
(2) Purge the air from the charge hose.
– Open the valve at the bottom of the cylinder
and press the check valve on the charge set
to purge the air. (Be careful of the liquid
refrigerant). The procedure is the same if
using a gas cylinder.
to purge the air. (Be careful of the liquid
refrigerant). The procedure is the same if
using a gas cylinder.
(3) Open the valve (Lo side on the charge set and
charge the system with liquid refrigerant.
– If the system can not be charged with the
specified amount of refrigerant, it can be
charged with a little at a time (approximately
150g each time) while operating the air
conditioner in the cooling cycle; however, one
time is not sufficient, wait approximately 1
minute and then repeat the procedure
(pumping down-pin).
charged with a little at a time (approximately
150g each time) while operating the air
conditioner in the cooling cycle; however, one
time is not sufficient, wait approximately 1
minute and then repeat the procedure
(pumping down-pin).
(4) Immediately disconnect the charge hose from
the 3-way valve’s service port.
– Stopping partway will allow the gas to be
discharged.
– If the system has been charged with liquid
refrigerant while operating the air conditioner
turn off the air conditioner before
disconnecting the hose.
turn off the air conditioner before
disconnecting the hose.
(5) Mount the valve stem nuts and the service
port nut.
– Use torque wrench to tighten the service port
nut to a torque of 1.8 kg.m.
– Be sure to check for gas leakage.
\
This is different from previous procedures.
Because you are charging with liquid refrigerant
from the gas side, absolutely do not attempt to
charge with larger amounts of liquid refrigerant
while operating the air conditioner.
Because you are charging with liquid refrigerant
from the gas side, absolutely do not attempt to
charge with larger amounts of liquid refrigerant
while operating the air conditioner.
Lo
Charging
cylinder
cylinder
Outdoor unit
Indoor unit
Liquid side
Gas side
CLOSE
Open
2-Way
valve
valve
3-Way
valve
valve
OPEN
Open
Check valve
(1)
-50-
Cycle Troubleshooting Guide
Trouble analysis
1. Check temperature difference between intake and discharge air and operating current.
Temp. Difference
Temp. difference : approx. 0°C
Current : less than 80% of
Current : less than 80% of
rated current
Temp. difference : approx. 8°C
Current : less than 80% of
Current : less than 80% of
rated current
Temp. difference : less than 8°C
Current : over the reated
Current : over the reated
current
Temp. difference : over 8°C
Operating Current
• All amount of refrigerant leaked
out. Check refrigeration cycle.
• Refrigerant leakege
Clog of refrigeration cycle
Defective compressor
Defective compressor
• Excessive amount of refrigerant
• Normal
Notice :
Temperature difference between intake and discharge air depends on room air humidity. When the room air
humidity is relativery higher, temperature difference is smaller. When the room air humidity is relatively lower
temperature difference is larger.
Temperature difference between intake and discharge air depends on room air humidity. When the room air
humidity is relativery higher, temperature difference is smaller. When the room air humidity is relatively lower
temperature difference is larger.
2. Check temperature and pressure of refrigeration cycle.
Notice :
1. The suction pressure is usually 4.0~6.0 kg/cm
1. The suction pressure is usually 4.0~6.0 kg/cm
2
G(Cooling) at normal condition.
2. The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with
putty.
Suction pressure
Temperature
(Compared with
(Compared with
Cause of Trouble
Description
the normal value)
the normal valve)
Defective compressor
Current is low.
Defective 4-way reverse valve
Excessive amount of
High pressure does not quickly
Normal
refrigerant
rise at the beginning of
operation.
operation.
Insufficient amount of
Current is low.
Lower
Higher
refrigerant (Leakage)
Clogging
Clogging
Current is low.
High
Higher
-51-
-52-
1. The malfunction indicator of indoor (see the operating LED of the INDOOR)
Self-diagnosis function
The cause of malfunction
Error
Code
1
Indoor TH. is short or open.
Outdoor TH. is short or open.
Outdoor OLP TH is short or
open.
open.
Comunication error (serial
comunication).
comunication).
DC peak error.
Running current is
overloaded.
overloaded.
The operating LED will be
blinking once.
blinking once.
The operating LED will be
blinking twice.
blinking twice.
The operating LED will be
blinking 4 times.
blinking 4 times.
The operating LED will be
blinking 5 times.
blinking 5 times.
The operating LED will be
blinking 6 times.
blinking 6 times.
The operating LED will be
blinking 7 times.
blinking 7 times.
Keep operating state.
Keep operating state.
Restart compressor when OLP TH
Temp is 74°C below.
Temp is 74°C below.
The operation is off(enable to restart
by remote controller).
by remote controller).
Compressor will be turned off
immediately.
immediately.
Compressor will be turned off
immediately.
immediately.
Malfunction indicator
The operating state
2. The malfunction indicator of outdoor (see the LED01M on the outdoor PCB ass’y)
The cause of malfunction
Indoor TH. is short or open.
Outdoor OLP is open.
Comunication error (serial
comunication).
comunication).
DC peak error.
Running current is
overloaded.
overloaded.
Comp. dome TH is short or
open.
open.
The LED01M will be blinking
twice.
twice.
The LED01M will be blinking 4
times.
times.
The LED01M will be blinking 5
times.
times.
The LED01M will be blinking 6
times.
times.
The LED01M will be blinking 7
times.
times.
The LED01M will be blinking 10
times.
times.
Keep operating state.
Restart comp. on in the OLP short
state.
state.
The operation is off(enable to restart
by remote controller).
by remote controller).
Compressor will be turned off
immediately.
immediately.
Compressor will be turned off
immediately.
immediately.
Compressor will be turned off
immediately.
immediately.
Malfunction indicator
The operating state
❈
Error code
➅
,
➆
can’t be operated unless the power cord is removed.
2
4
5
6
7
2
4
5
6
7
10
Error
Code
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