LG TB-C096TSG0 User manual

Ceiling Duct Type
Air Conditioner
SERVICE MANUAL
MODELS: TB-C096TSG0
TB-C096TSG1
TB-C096TSG2
TB-C126TSG0
TB-C126TSG1
TB-C126TSG2
TB-H096TSG0
TB-H126TSG0

Contents
Functions .................................................................................................................................2
Product Specifications (Cooling & Heating)..........................................................................4
Dimensions ..............................................................................................................................6
Refrigeration Cycle Diagram ..................................................................................................9
Wiring Diagram ......................................................................................................................10
Operation Details ...................................................................................................................11
Cycle ........................................................................................................................................15
Cycle Troubleshooting Guide ...............................................................................................18
Electronic Parts Troubleshooting Guide .............................................................................19
Electronic Control Device .....................................................................................................22
Exploded View and Replacement Parts List .......................................................................24
–1–
Schematic Diagram ................................................................................................................... 23

Functions
Indoor Unit
Operation ON/OFF by Remote controller
Sensing the Room Temperature
Room temperature control
Starting Current Control
Time Delay Safety Control
Indoor Fan Speed Control
Soft Dry Operation Mode
Auto Operation(Auto Change Over)
Deice (defrost) control (Heating)
Auto Restart
–2–
Hot-start Control (Heating) • The indoor fan stops until the evaporator piping tempera-
ture will be reached at 25°C.
High head height Drain pump(Optional) • A standard drain-head height of up to 700mm is possible.
Central Control(Optional) •
It is operating individually or totally by central control function.
Group Control(Optional Wiring) •
Each controller can control 16 units and 8 controllers can connect.
• It operates maximum 16 units by only one wired remote con-
troller and each unit starts random to prevent overcurrent.
• Room temperature sensor. (Thermistor)
• Maintains the room temperature in accordance with the Setting Temp.
• Indoor fan is delayed for 5 seconds at the starting.
• Restarting is inhibited for approx. 3 minutes.
• High, Med, Low
• Intermittent operation of fan at low speed.
• Although the air-conditioner is turned off by a power failure, it is restarted automati-
cally previous operation mode after power supply.
• The setting temperature and desired operation mode are auto-
matically set by fuzzy rule.
• Both the indoor and outdoor fan stops during defrosting.
• Hot start after defrost ends.

–3–
Duct Type Remote Controller
Operation ON/OFF
Operation Mode Selection
Fan Speed Selection
Room Temperature Display
Temperature Setting
Setting the Timer
Weekly Program
(Cooling
model only) (Heating
model only)
(Low) (Med) (High)
Cooling Operation Mode ( )
Heating Operation Mode ( ) Auto Operation Mode ( )
Soft Dry Operation Mode ( )
Fan Operation Mode
Phase Control Setting
HIMEDLO
Program Holiday
SET/CLR
MinHour
Week
Timer CancelTimer Cancel
Timer
: High:39°C ↔LOW:11°C
: Fan Operates without cooling & heating
Cooling Heating
Down to 18°C
Up to 30°C
Down to 16°C
Up to 30°C

–4–
Product Specifications (Cooling & Heating)
Item Unit TB-H096TSG0 TB-H126TSG0
lareneG
Cooling Capacity W 2600 3600
Heating Capacity W 2900 4200
Input Cooling W 980 1300
Heating W 950 1350
Running Current Cooling/Heating A 4.8/4.5 6.1/6.3
Power Supply Ø,V,Hz 1,220-240,50 1,220-240,50
E.E.R Cooling W/W 2.65 2.77
Heating W/W 3.05 3.11
Setting temperature range Cooling/Heating 18~30/16~30
Dehumidification Rate l/h 1.0 1.6
External Static Pressure mm Aq （0）3
Refrigerant Control Capillary Tube Capillary Tube
Refrigerant Charge g, type 790, R-22 830, R-22
roo
d
n
I
Indoor Fan Motor
Output W 35 35
Type Condenser Inducted Condenser Inducted
Model YDK110-35-4L YDK110-35-4L
No. of Poles 4 4
Input W 68 71
Running Current A 0.3 0.3
Capacitor uF/Vac 1.5/220 2.0/400
Indoor Fan
Type Sirocco Fan Sirocco Fan
No.used / diameter EA/mm 1/Ø150 1/Ø150
Motor Step 3 3
Indoor Fan RPM Cooling (H/M/L) rpm 900/800/700 960/880/780
Air Circulation Indoor(H/M/L) CMM 8/7/6 9/8/7
Noise Level (Sound Press,1 m) Indoor (H/M/L) dB(A)±3 38/36/34 42/40/38
Temperature Controller Thermistor Thermistor
Indoor Coil
Tube Size (OD) mm 7 7
Fins per inch 18 18
No. of rows and Column 3R 12C 3R 12C
Dimensions (W×H×D) Indoor mm 650*230*535 650*230*535
Net Weight Indoor kg 25 25
ro
o
dtuO
Compressor
Locked Rotor Amp. A19 -
Type Rotary Rotary
Quantity No. 1 1
Model QK164HAA QJ250HAA
Maker LG LG
Capacity Btu/h 9550 14360
Motor Type PSC PSC
Motor Input W 892 1342
Oil Type SUNISO 4GSI SUNISO 4GSI
Oil Charge cc 350 350
PTCR Ohm - -
O.L.P Type (model name) MRA99018-12027 MRA12052-12027
Outdoor Coil
Tube Size (OD) mm 9.52 7
Fins per inch 18 18
No. of rows and Column 1R 20C 2R 24C
Outdoor fan motor
Output W 27 29
Model
A
RC206E11 -
No. of Poles 6 6
Input W 85.6 85.6
Running Current A 0.42 0.42
Capacitor mF/Vac 2/400 2/400
Outdoor Fan
Type Propeller Propeller
No. Used / Diameter EA/mm 1/￠400 1/￠379
Discharge Side/Top Side Discharge Side Discharge
Speed RPM 790 820
Air Circulation Outdoor CMM - -
Noise Level (Sound Press,1 m) Outdoor dB(A)±3 50 53
SVC Valve Liquid inch (mm) 1/4(6.35) 1/4(6.35)
Gas inch (mm) 3/8(9.52) 1/2(12.7)
Dimensions (W×H×D) Outdoor mm 770*540*245 801*555*262
Net Weight Outdoor kg 36 36
re
h
tO
Power Supply cable mm22.5 2.5
Connecting cable mm20.75 0.75
Connecting Tube
(Socket Flare)
Liquid Side inch (mm) 1/4(6.35) 1/4(6.35)
Gas Side inch (mm) 3/8(9.52) 1/2(12.7)
Length, standard meter 5 5
Max length/elevation meter 15/7 15/7
Drain hose Indoor unit(ID) mm 19 19
Packing Dimension (W×H×D) Indoor mm 760*625*300 760*625*300
Outdoor mm 908*565*348 956*600*388
18~30/16~30
（0）3
Notes: 1. Capacities are based on the following conditions:
Cooling: - Indoor Temperature 27°C(80.6°F) DB /19°C(66.2°F) WB Heating: - Indoor Temperature 20°C(68°F) DB / 15°C(59°F) WB
- Outdoor Temperature 35°C(95°F) DB /24°C(75.2°F) WB - Outdoor Temperature 7°C(44.6°F) DB / 6°C(42.8°F) WB
- Interconnecting Piping Length 5m
- Level Difference of Zero. - Level Difference of Zero.
2. Capacities are Net Capacities.
3. Due to our policy of innovation some specifications may be changed without notification.
- Interconnecting Piping Length 5 m

–5–
Product Specifications (Cooling Only)
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Ø,V,Hz
18~30
Notes: 1. Capacities are based on the following conditions:
Cooling: - Indoor Temperature 27°C(80.6°F) DB /19°C(66.2°F) WB Heating: - Indoor Temperature 20°C(68°F) DB / 15°C(59°F) WB
- Outdoor Temperature 35°C(95°F) DB /24°C(75.2°F) WB - Outdoor Temperature 7°C(44.6°F) DB / 6°C(42.8°F) WB
- Interconnecting Piping Length 5m
- Level Difference of Zero. - Level Difference of Zero.
2. Capacities are Net Capacities.
3. Due to our policy of innovation some specifications may be changed without notification.
- Interconnecting Piping Length 5 m

Dimensions
–6–
(1) Indoor Unit
29
7
6
1
1
3
2
35
62
15 434
635
190
116
001
19
72
47
2
31
708
525
455
678

(2) Outdoor Unit
–7–
WL2
L3
1
L
D
H
4L
5L
MODEL
DIMENSION
Wmm
Hmm
Dmm
L1 mm
L2 mm
L3 mm
L4 mm
L5 mm
770
540
245
287
64
518
10
100
TB-C096TSG0/1/2
TB-H096TSG0

W
D
1L
2L
3L
L6L7 L8 L9
4L
H
5L
MODEL
DIMENSION
Wmm
Hmm
Dmm
L1 mm
L2 mm
L3 mm
L4 mm
L5 mm
L6 mm
L7 mm
L8 mm
L9 mm
L10 mm
L11 mm
11L
0
1
L
TB-C126TSG0/1/2
801
555
262
339
37
297
543
11
591
105
105
72
86
77
TB-H126TSG0
(3) Outdoor Unit
– 8 –

1. HEAT PUMP
Refrigeration Cycle Diagram
2. COOLING ONLY
INDOOR UNIT OUTDOOR UNIT
INDOOR UNIT OUTDOOR UNIT
HEAT EXCHANGER
（EVAPORATOR）
HEAT EXCHANGER
（EVAPORATOR）
HEAT EXCHANGER
（CONDENSER）
HEAT EXCHANGER
（CONDENSER）
COMPRESSOR
COMPRESSOR
GAS SIDE
LIQUID SIDE
GAS SIDE
LIQUID SIDE
CAPILLARY TUBE
CAPILLARY TUBE
CAPILLARY TUBE
SOLENOID VALVE
COOLING
HEATING
REVERSING
VALVE
Gas Liquid
Elevation（m）
Piping length（m）* Additional
refrigerant
(g/m)
Pipe size (mm)
Rated RatedMax. Max.
( Diameter )
9. 25 6. 35 5 15 7 20
5
MODEL
12.7 6. 35 5 15 7 30
5
H/P SW
– 9 –
TB-H096*
TB-C096*
TB-H126*
TB-C126*
• Rated performance for refrigerant line length of: 5m.
• If 12K Model is installed at a distance of 15m, 300g of refrigerant should be added (15-5)x30g=300g.

–10–
Wiring Diagram
(1)HEAT PUMP
Model : TB-H096/126TSG0
INDOOR WIRING DIAGRAM
REWOP OT
YL/GN
BR
BL
YL/GN
RD
BK
BR
YL
BK OR BL BL YL/GN
TEMP.
THERMISTOR
PIPE
THERMISTOR
FLOAT S/W
REMOTE
CONTROL
ZONE CONTROL
CN-ZONE
CN-OUT
YAWA
PMOC
CN-AIRC
A/CL
REWOP-NC
TRIAC
CN-INFANSUB
MOTOR
CN-INFAN
CN-D/PUMP
DRAIN
PUMP
CN-ROOM
E
P
IP-
N
C
TAOLF-NC
OMER-NC
FUSE
250V,8A
P/NO:3854A22218A
TINU ROODTUO OT
BR BL
BR
OR
BL
NG/L
Y
BL
BL
BL
BL
RD
TB2
TB1
BK WH
YL
BL
YL
RD
BL
BR
BK
4 (N)
3 (L)
C
S
R
567
L3 L4
L2
L1
NC
TNS
NO NO NC
MOTOR
FAN
7
5
8
6
1
34
2
COMP
OUTDOOR WIRING DIAGRAM
RE
WO
P
Y
ALER
TO INDOOR UNIT
PIPE TH D.P
REVERSING
VALVE
O.L.P
CAPACITOR A
CAPACITOR B
P/NO:3854A20318T
BR BL
BR
OR
BL
BK
NG/L
Y
BL
BL
BL
BL
RD
TB2
TB1
BK WH
YL
BL
YL
RD
BL
BR
BK
4 (N)
3 (L)
C
S
R
567
L3 L4
L2
L1
NC
TNS
NO NO NC
MOTOR
FAN
7
5
8
6
1
34
2
COMP
OUTDOOR WIRING DIAGRAM
RE
WO
P
Y
ALER
TO INDOOR UNIT
PIPE TH D.P
REVERSING
VALVE
O.L.P
CAPACITOR A
CAPACITOR B
P/NO:3854A20318V
BL
BR
(H/P SWITCH APPLIED MODEL)
(2)COOLING ONLY
Model : TB-C096/126TSG0
INDOOR WIRING DIAGRAM
R
EWOP OT
YL/GN
BR
BL
YL/GN
RD
BR
YL
BK OR BL BL YL/GN
ROOM
THERMISTOR
IN-PIPE
THERMISTOR
FLOAT S/W
REMOTE
CONTROL
ZONE CONTROL
CN-ZONE
P
MOC
CN-AIRC
A/CL
REWOP-NC
TRIAC
CN-INFANSUB
MOTOR
CN-INFAN
CN-D/PUMP
DRAIN
PUMP
CN-ROOM
EPIP-NC
T
A
O
LF
-
NC
OMER-
N
C
FUSE
250V,8A
P/NO:3854A20322X
TINU ROODTUO OT
P/NO:3854A20318Q
COMP
BL
RD
BR
C
S
R
O.L.P
BR
CAPACITOR
YL
RD
BL
MOTOR
FAN
R
EW
OP
Y
AL
E
R
BR BL
BL
BL
N
G
/L
Y
RD
4 (N)
3 (L)
5
TO INDOOR UNIT
H FC
OUTDOOR WIRING DIAGRAM

–11–
Operation Details
(1) The function of main control
1. Time Delay safety Control
• 3min... The compressor is ceased for 3minutes to balance the pressure in the refrigeration cycle.
(Protection of compressor)
• 30sec... The 4-way valve is ceased for 30sec. to prevent the refrigerant-gas abnormal noise when the Heating
operation is OFF or switched to the other operation mode while compress is off.
While compressor is running, it takes 3~5 seconds to switch.
2. Soft-Dry Operation
• The indoor fan speed is automatically set to the low, so the shift of the indoor fan speed is impossible because of
already being set to the best speed for Dry Operation by Micom Control.
3. Cooling Mode Operation
• When selecting the Cooling( ) Mode Operation, the unit will operate according to the setting by the remote con-
troller and the operation diagram is as following.
Intake Air temp.
SET TEMP.+0.5°C
(COMP. ON)
SET TEMP. -0.5°C
(COMP. OFF) More than More than
3 minutes 3 minutes
Selecting Selecting Selecting
fan speed fan speed fan speed
COMPRESSOR ON OFF ON OFF ON
INDOOR FAN Low Low

–12–
Intake Air temp.
Setting temp.+3°C
(Compressor OFF)
Setting temp.
(Compressor ON)
INDOOR FAN Low OFF Low Low OFF
COMPRESSOR ON OFF ON OFF
• A point; While the indoor Heat-Exchanger temperature is higher than 40°C fan operates at low speed, when
it becomes lower than 40˚C fan stops.
• B point; When the indoor Heat-Exchanger temperature is higher than 42°C, fan operates at seleted fan
speed, when it becomes lower than 39°C, the fan operates at low speed.
4. Heating Mode Operation (Except Cooling Model)
The unit will operate according to the setting by the remote controller and the operation diagram is shown as following.
Hot Start Low
Selecting
Fan Speed
minimum 3min
Selecting fan
speed
minimum
10sec.
1min
A A
minimum
10sec.
B
5. Hot-Start Control
• The indoor fan stops until the evaporator piping temperature will be reached to 25°C.
• The operation diagram is as following.
PIPING
TEMPERATURE 1min
COMPRESSOR
INDOOR FAN
ON
22°C
: Selected Fan : Low Fan : Fan Stop
25°C

–13–
6. Defrost Control
• Defrost control is availavle 45 minutes later since heating mode operation started, and it will not prolong over
10 minutes.
• Defrost control is carried out when the outdoor pipe temp. falls below -6°C for more than 3 minutes after 45
minutes passed from starting of heating operation.
• Defrost ends after 10 minutes passed from starting of defrost operation or when the outdoor pipe temp. rises
over 12°C after 5 minutes passed from starting of defrost.
7. Self-diagnosis Function
• 'CHECK' will flash in the remote controller display when a problem occurs. Then please contact your dealer.
• Correct the accident point as shown in the table below before restarting operation.
• During the normal operation 'CHECK' won't be displayed in the remote controller.
Remote controller LCD Accident Point
CH 01 Indoor room temperature thermistor error
CH 02 Indoor piping thermistor error
CH 03 Indoor main body / Remote controller unit communication error
CH 04 (Optional) Water level float switch error
More than 45 minutes
of heating operation
Within
10 min
ON OFF
ON ON
ON
ON OFF
OFF
COMPRESSOR
4-WAY VALVE
INDOOR FAN
-6°C ON
12°C OFF
The outdoor
piping Temp.
ON
More than 10 min.
running of compressor
More than 45 minutes
of heating operation
3 min
HOT-
START
ON

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
-14-
Open
(with charging cylinder)
Open
(with charging cylinder)

–15–
Cycle
1. Installation (Connecting the piping between indoor and outdoor unit)
• Installation
(1) Connect the piping between the indoor and
outdoor unit firmly.
– Incorrect connection may cause the leakage and
incomplete vacuuming.
(2) Attach the charging hose (manifold gage) to the
service port.
– Charging hose is necessary to check the pressure
and to inject N2for leakage test.
– The valve of charging hose must be closed before
being connected.
(3) Inject the 100~300g N2through the charging hose
opening the valve.
(4) Check the joint part using a gas detector or soapy
water for leakage.
– On checking, the service valve of main service port
must be closed, this test is only for checking whether
pipe connection is OK or not.
(5) If there is no leakage, discharge N2in piping
completely into tank for retrieving.
– Completely discharge is needed for vacuuming.
– If leakage is found, please fasten the joint more
tightly.
(6) After closing the valve of charging hose,
disconnect the tank and connect the vacuum pump
to charging hose and open the valve again for
vacuuming.
(7) Turn on the vacuum pump until the pressure drops
below 0 kg/cm2.
(8) After vacuuming, disconnect the vacuum pump and
open the spindle of service port (liquid-side)
slightly for 30 sec and then open the spindle of
service port (gas side) with hexagonal wrench.
(9) Open the liquid side completely first and then the
gas side fully in order.
Lo
Purge the air
Outdoor unit
Indoor unit Liquid side
Gas side
3-Way
valve
3-Way
valve
Gas cylinder
R22

2. Disconnection (on moving)
• Disconnection
(1) Attach the charging hose (manifold gage) to
the service port.
– Connect the manifold gage once to the service
port not stopping. Stopping in the middle of
process may cause the leakage.
(2) Purge the air in hose into special device such
as retrieving tank opening the valve of
charging- hose (gas side) slightly and then
close it tightly.
(3) Operate the air conditioner for 10~15 min until
cycle is stabilized.
(4) Close the spindle of service port (liquid side-
high pressure) and wait till pressure of gas
side (low pressure) drops below 0kgf/cm2.
(5) After the needle of gage indicates below
0 kgf/cm2, close the valve of gas side quickly
and turn off the power.
(6) Disconnect the piping between indoor and
outdoor unit and then put on service cap to
the service port.
Lo
Outdoor unit
Indoor unit Liquid side
Gas side
Retrieving Tank
–16–

3. 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.
– If you are using a gas cylinder, also use a scale
and reverse the cylinder so that the system can
be charged in liquid state.
(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.
(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.
(4) Immediately disconnect the charge hose from
the 3-way valve’s service port.
– Stopping par tway 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.
(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.
Lo
Charging
cylinder
Outdoor unit
Indoor unit Liquid side
Gas side
CLOSE
Open
2-Way
valve
3-Way
valve
OPEN
Open
Check valve
(1)
–17–

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
rated current
Temp. difference : approx. 8°C
Current : less than 80% of
rated current
Temp. difference : less than 8°C
Current : over the rated
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
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.
2. Check temperature and pressure of refrigeration cycle.
Notice :
1. The suction pressure is usually 4.5~6.0 kg/cm2G 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 value)
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
Insufficient amount of Current is low
Lower Higher refrigerant (Leakage)
Clogging Current is low
High
Higher
–18–

Electronic Parts Troubleshooting Guide
: The unit does not operate.
Possible Trouble 1
–19–
YES
NO
YES
Is the input voltage
of transformer DC230V?
Check the FUSE
and the wiring diagram.
Is the PIN 49,58 of
MICOM. DC5V?
Exchange MICOM.
YES
NO Check the main P.C.B
pattern.
NO
YES
Is the output voltage
of IC03D DC5V?
NO Exchange
IC03D .
Is the input voltage
of IC03D about AC12V?
Check the
5V P.C.B pattern.