DOWNLOAD LG AS-H076QGA2_QNA2 / AS-H096QGA2_QNA2 / AS-H126RGA2_RNA2 / LS-C096QLA2 / LS-H096QLA2 / LS-C126RLA2 / LS-H126RGA2_RMA2_RLA2 Service Manual ↓ Size: 3.84 MB | Pages: 68 in PDF or view online for FREE

Model
AS-H076QGA2_QNA2 AS-H096QGA2_QNA2 AS-H126RGA2_RNA2 LS-C096QLA2 LS-H096QLA2 LS-C126RLA2 LS-H126RGA2_RMA2_RLA2
Pages
68
Size
3.84 MB
Type
PDF
Document
Service Manual
Brand
Device
Air Conditioner
File
as-h076qga2-qna2-as-h096qga2-qna2-as-h126rga2-rna2.zip
Date
PREV: LG AS-C0764DM0 / AS-H0764DM0 / LS-C1264DM0 / LS-H0764DM0 / AS-C0964DM0 / AS-H0964DM0 / LS-C1865DM0 / LS-H0964DL0 / AS-C1264DM0 / AS-H1264DM0 / LS-C2665DM0 / LS-H1264DM0 / AS-C1865DM0 / AS-H1865DM0 / LS-H1865DM0 / AS-C2465DM0 / AS-H2465DM0 / LS-H2665DM0 / AS-C0764DB0 / AS-H0764GM0 / LS-H2465DM0 / AS-C0964DB0 / AS-H0964GM0 / AS-C1264DB0 / AS-H1264GM0 / AS-C1865DB0 / AS-H1865GM0 / AS-C2465DB0 / AS-H2465GM0 Service Manual

LG AS-H076QGA2_QNA2 / AS-H096QGA2_QNA2 / AS-H126RGA2_RNA2 / LS-C096QLA2 / LS-H096QLA2 / LS-C126RLA2 / LS-H126RGA2_RMA2_RLA2 Service Manual ▷ View online

Service Manual  41
Troubleshooting Guide 
Troubleshooting Guide 
INDOOR UNIT
OUTDOOR UNIT
INDOOR UNIT
OUTDOOR UNIT
HEAT
EXCHANGE
(EVAPORATOR)
HEAT
EXCHANGE
(EVAPORATOR)
HEAT
EXCHANGE
(CONDENSER)
HEAT
EXCHANGE
(CONDENSER)
COMPRESSOR
COMPRESSOR
ACCUMU
LATOR
GAS SIDE
GAS SIDE
3-WAY VALVE
LIQUID SIDE
LIQUID SIDE
3-WAY VALVE
CAPILLARY TUBE
CAPILLARY TUBE
CHECK VALVE
(Heating Model only)
COOLING
HEATING
REVERSING
VALVE
(Heating Model Only)
(1) Cooling Only Models
Refrigeration Cycle Diagram
(2) Cooling & Heating Models
42 Room Air Conditioner
Troubleshooting Guide 
CAUTION:* Capicity is based on standard length and maximum allowance length
is the basis of reliability.
* Oil trap should be installed per 5~7 meters.
Outdoor unit
Indoor unit
A
B
A
Oil trap
Outdoor unit
Indoor unit
B
In case more than 5m
7k~14k
3/8"(Ø9.52)
1/4"(Ø6.35)
4 or 7.5
7
15
20
1/2"(Ø12.7)
1/4"(Ø6.35)
4 or 7.5
7
15
20
1/2"(Ø12.7)
1/4"(Ø6.35)
4 or 7.5
15
30
20
18k~28k
5/8"(Ø15.88)
1/4"(Ø6.35)
4 or 7.5
15
30
20
5/8"(Ø15.88)
3/8"(Ø9.52)
4 or 7.5
15
30
30
30k~38k
5/8"(Ø15.88)
3/8"(Ø9.52)
7.5
15
30
30
3/4"(Ø19.05)
3/8"(Ø9.52)
7.5
15
30
50
Pipe Size
Capacity
(Btu/h)
GAS
LIQUID
Additional
Refrigerant
(g/m)
Max. 
Length
A  (m)
Max.
Elevation
B  (m)
Standard
Length
(m)
Pipe Length and the Elevation
Service Manual  43
Troubleshooting Guide 
2-way,  3-way Valve 
2-way Valve (Liquid Side)
3-way Valve (Gas Side)
Shaft position
Shaft position
Service port 
Closed
Closed
Closed
(with valve cap)
(with valve cap)
(with cap) 
Open
Closed
Open
(counter-clockwise)
(clockwise)
(push-pin or with
vacumm pump)
Open
Open
Closed
(with valve cap)
(with valve cap)
(with cap)
Closed
Open
Open
(clockwise)
(counter-clockwise)
(connected manifold
gauge) 
Open
Open
Open
(with charging 
cylinder)
Open
Open
Open
(with charging
cylinder) 
Open
Open
Open
Open
Works
Shipping
Air purging
(Installation)
Operation
Pumping down
(Transfering)
Evacuation
(Servicing)
Gas charging
(Servicing)
Pressure check
(Servicing)
Gas releasing
(Servicing) 
1.
2.
3.
4.
5.
6.
Valve cap
Open position
Closed position
Pin
Service
port
Service
port cap
To outdoor unit
Flare nut
To 
piping 
connection
To outdoor unit
Hexagonal wrench (4mm)
Open position
Closed position
To 
piping 
connection
Flare nut
Open
(with charging cylinder)
Open
(with charging cylinder)
44 Room Air Conditioner
Troubleshooting Guide 
• Procedure 
(1) Confirm that both the 2-way and 3-way valves
are set to the open position.  
–  Remove the valve stem caps and confirm that
the valve stems are in the raised position. 
– Be sure to use a hexagonal wrench to operate
the valve stems. 
(2) Operate the unit for 10 to 15 minutes. 
(3) Stop operation and wait for 3 minutes, then
connect the charge set to the service port of
the 3-way valve.
–  Connect the charge hose with the push pin to
the service port.
(4) Air purging of the charge hose.
–  Open the low-pressure valve on the charge set
slightly to air purge from the charge hose. 
(5) Set the 2-way valve to the closed position. 
(6) Operate the air conditioner at the cooling
cycle and stop it when the gauge indicates
1kg/cm
2
g.
(7) Immediately set the 3-way valve to the closed
position.
–  Do this quickly so that the gauge ends up indi-
cating 3 to 5kg/cm
2
g.
(8) Disconnect the charge set, and mount the 2-
way and 3-way valve’s stem nuts and the ser-
vice 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. 
Lo
Closed
Purge the air
Outdoor unit
Indoor unit
Liquid side
Gas side
CLOSE
Open
2-Way
valve
3-Way
valve
CLOSE
Pumping Down 
CAUTION: Do not use the existing
charge set for R-22.
It is necessary to use new charge set for R-
410A. The pressure of R-410A is 1.6 times
higher than that of R-22. Thus, the high pres-
sure side gauge of charge set should be used
higher pressure gauge of 50kg/cm
2
range.
Page of 68
Display

Click on the first or last page to see other AS-H076QGA2_QNA2 / AS-H096QGA2_QNA2 / AS-H126RGA2_RNA2 / LS-C096QLA2 / LS-H096QLA2 / LS-C126RLA2 / LS-H126RGA2_RMA2_RLA2 service manuals if exist.

RANDOM: