LG TBNH488RSS5.ANWBAEC User guide

Brand: LG

Model: TBNH488RSS5.ANWBAEC

Category: Split-system air conditioners

Type: User guide

LG TBNH488RSS5.ANWBAEC ceiling duct type air conditioner offers powerful cooling and heating capabilities with a rated cooling capacity of 14kW and a heating capacity of 15.2kW. It features inverter technology for energy efficiency and precise temperature control. The unit has a soft dry operation mode to maintain a comfortable humidity level without over-cooling the room. Additionally, it comes with a wired remote controller for convenient operation and a built-in timer for scheduling on and off times.

Ceiling Duct Type

Air Conditioner

SERVICE MANUAL

MODELS:

TB-H488RSS5

Contents

Functions ..................................................................................................................................3

Product Specifications .............................................................................................................5

Dimensions ..............................................................................................................................11

Refrigeration Cycle Diagram ..................................................................................................31

Wiring Diagram .......................................................................................................................35

Operation Details ....................................................................................................................51

Installation of Indoor, Outdoor Unit ......................................................................................54

Test running ............................................................................................................................66

Optional Operation .................................................................................................................68

External Static Pressure & air Flow ......................................................................................70

3-way Valve .............................................................................................................................71

Cycle ........................................................................................................................................74

Cycle Troubleshooting Guide ................................................................................................78

Electronic Parts Troubleshooting Guide ..............................................................................79

Electronic control device .......................................................................................................82

Exploded View and Replacement Parts List ........................................................................83

–2–

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

–3–

Hot-start Control (Heating)

• The indoor fan does not start until the evaporator piping

temperature will be reached at 28°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)

Radio Frequency Control (Optional)

•

Each controller can control 16 units and 8 controllers can be connected.

•

It operates maximum 16 units with the help of only one wired remote

controller and each unit can be randomly started to prevent overcurrent.

• Room temperature sensor. (Thermistor)

•

Maintains the room temperature in accordance with the Setting Temperature.

• Indoor fan is delayed for 5 seconds at the starting.

• Restarting is inhibited for approx. 3 minutes.

• High, Medium, 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 stop during defrosting.

• Hot start after defrost ends.

–4–

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

HIMEDLO

Program Holiday

SET/CLR

MinHour

Week

Timer CancelTimer Cancel

: High:39°C ļ LOW:11°C

: Only the Fan is in operation.

Cooling Heating

Down to 18°C

Up to 30°C

Down to 16°C

Up to 30°C

1. Specifications

1.1 Indoor unit

-5-

1. Specifications

1.2 Outdoor Unit

-6-

Note :

1. All data are based on the following conditions:

- Cooling Temperature : Indoor 27°C(80.6°F) DB / 19°C(66.2°F) WB

Outdoor 35°C(95°F) DB / 24°C(75.2°F) WB

- Heating Temperature : Indoor 20°C(68°F) DB / 15°C(59°F) WB

Outdoor 7°C(44.6°F) DB / 6°C(42.8°F) WB

- Piping Length : Interconnected Pipe L

ength = 7.5m

- Difference Limit of Elevation (Outdoor ~ Indoor Unit) is Zero.

2. Wiring cable size must comply with the applicable local and national code.

3. Due to our policy of innovation some specifications may be changed without notification.

4. Sound Level Values are measured at Anechoic chamber.

Therefore, these values can be increased owing to ambient conditions during opration.

TBUH488RSS5

Rated kW 14.0

Rated Btu/h 48,000

Rated kW 15.2

Rated Btu/h 52,000

Cooling Rated kW 5.30

Heating Rated kW 5.00

W / W 2.65 / 3.05

V / Ø / Hz 380-415 / 3 / 50

Cooling Rated A 9.0

Heating Rated A 8.0

Cooling Max. A -

Heating Max. A -

Wiring Connections Power Supply Cable (included Earth)

No. x mm

(AWG)

5C x 3.5 (12)

- White

W x H x D mm 900 × 1,165 × 370

W x H x D inch 35-7/16 × 45-7/8 × 14-9/16

kg (lbs) 95.0 (209.4)

- Scroll

Model x No. SB061YAB x 1

- Three Phase Induction Motor

W x No. 4,050 x 1

- R22

g (oz) 3,600 (141.1)

m (ft) 7.5 (24.6)

g/m (oz/ft) 65 (0.76)

- Capillary

- SUNISO 4GSI or NM56M

x No. 1,650 x 1

- (2 × 26 × 17) × 2

- Propeller

/min x No.

52.5 x 2

- AC

W x No. 77 x 2

Cooling Rated dB(A) 61

Heating Rated dB(A) 61

Liquid Outer Dia. mm(inch) Ø 9.52 (3/8)

Gas Outer Dia. mm(inch) Ø 19.05 (3/4)

Max. m (ft) 50 (164)

Maximum Height

Difference

Outdoor Unit ~ Indoor Unit Max. m (ft) 30 (98.4)

Cooling Min. ~ Max.

℃ DB (℉ DB)

21 (69.8) ~ 54 (129.2)

Heating Min. ~ Max.

℃ DB ( ℉ DB)

-5(23.0) ~ 24 (75

.2)

Heat Exchanger (Row x Column x Fins per inch) x No.

Operation Range

(Outdoor Temperature)

Fan

Fan Motor

Sound Pressure Level

Pipin

g Connections

Pipi

ng Length

Type

Air Flow Rate

Type

Dimensions

Casing Color

EER / COP

Type

Refrigerant Oil

Type

Precharged Amount

Charged volume

Power Input

Running Current

Starting Current

Power Supply

Output

Compressor

Refrigerant

Net Weight

Motor type

Motor Output

Chargeless-Pipe Length

del

Additional Charging Volume

Control

Outdoor unit

Capacity

Cooling

Heating

–9–

Description

PCB Connector

CN-PIPE

CN-ROOM

Model No.: TB-H488RSS5

High

Pressure

Switch(By-Pass)

High

Pressure

Switch

Compressor

Outdoor Unit

Indoor Unit

Ø9.52 / 3 way

Flare Connection

Ø19.05 / 3 way

Flare Connection

Ø19.05 / 2 way

Flare Connection

Ø9.52 / 2 way

Flare Connection

: Cooling

: Heating

BY-PASS

4 way

Valve

Accumulator

Condenser out

Capillary Tube

Cooling

Capillary Tube

Evaporator in

Capillary Tube

Heating

Capillary Tube

MM MM

Thermistor for

Suction

Air

temperature

Thermistor for evaporator

outlet temperature

Thermistor for evaporator outlet temperature

Thermistor for Suction Air temperature

3.Piping diagrams

Operation Details

(1) The function of main controls/controller

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 abnormal noise of the refrigerant gas when the

Heating operation is OFF or switched to the other operation mode while compressor 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 remote controller settings and

the operation diagram is as following.

–10–

Intake Air temp.

SET TEMP.+0.5°C

(COMP. ON)

SET TEMP. -0.5°C

nahteroMnahteroM)FFO.PMOC(

setunim3setunim3

gnitceleSgnitceleSgnitceleS

deepsnafdeepsnafdeepsnaf

COMPRESSOR ON OFF ON OFF ON

INDOOR FAN Low Low

–11–

Intake Air temp.

Setting temp.+3°C

(Compressor OFF)

Setting temp.

(Compressor ON)

FFOwoLwoLFFOwoLNAFROODNI

COMPRESSOR ON OFF ON OFF

• A point; While the Indoor Heat-Exchanger temperature is higher than 40°C, the fan operates at low speed,

and when it becomes lower than 40ÛC 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 remote controller settings and the operation diagram is shown as following.

Hot Start

Low

Selecting

Fan Speed

minimum 3min

Selecting fan

speed

minimum

10sec.

1min

minimum

10sec.

5. Hot-Start Control

• The indoor fan stops until the evaporator piping temperature reaches to 31°C.

• The operation diagram is as following.

PIPING

TEMPERATURE

1min

COMPRESSOR

INDOOR FAN

28°C

: Selected Fan : Low Fan : Fan Stop

31°C

–12–

6. Defrost Control

• Defrost control is available for 45 minutes since heating mode operation is 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 are passed from starting of heating operation.

• Defrost ends after 10 minutes are passed from starting of defrost operation or when the outdoor pipe temp.

rises to 12°C after 5 minutes are passed from starting of defrost.

7. Self-diagnosis Function

• 'CHECK' : Please contact your dealer if the remote controller displays this message 'CHECK'.

• Rectify the problem 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

9min. 45sec.

ON OFF

NONO

ON OFF

OFF

COMPRESSOR

4-WAY VALVE

INDOOR FAN

-6°C ON

12°C OFF

The outdoor

piping Temp.

More than 10 min.

running of compressor

More than 45 minutes

of heating operation

5sec.

HOT-

START

–13–

Installation of Indoor, Outdoor Unit

1. Selection of the best location

1) Indoor unit

Select location

Install the air conditioner in the location that satis-

fies the following conditions.

• Place should easily bear a load exceeding four

times the indoor unit’s weight.

• The place should enable the unit to be inspected

as shown in fig.

• The place should be such that leveled.

• The place should allow easy water drainage.(Suit-

able dimension “H” is necessary to get a slope to

drain as figure.)

• The place should easily connect with the outdoor

unit.

• The place where the unit is not affected by an

electrical noise.

• The place where air circulation in the room will be

good .

• There should not be near the unit any heat source

or steam.

2) Outdoor unit

• If an awning is built over the unit to prevent direct

sunlight or rain exposure, be careful that heat

transfer from the condenser is not restricted.

• There should be no animals or plants in vicinity of

the hot discharged air.

• Ensure the space indicated by arrows from the

wall, ceiling, fence or other obstacles.

More than

30cm

More than

30cm

More than

70cm

Sunroof

Fence or

obstacles

Top view

(unit: mm)

Front view

450

Front

Inspection hole

(450X450)

Control box

0001

–14–

2. Indoor unit installation

Installation of Unit

Install the unit above the ceiling correctly.

• Apply a joint-canvas between the unit and duct to

absorb unnecessary vibration.

• Apply a filter Accessory at air return hole.

• Install the unit leaning to a drainage hole side as

shown in figure for easy water drainage.

• A place where the unit will be leveled and that can

support the weight of the unit.

• A place where the unit can withstand its vibration.

• A place where service can be easily performed.

CASE 1

POSITION OF SUSPENSION BOLT

CASE 2

POSITION OF CONSOLE BOLT

(Unit:mm)

Drainage hole

M10 Nut

M10 SP. washer

M10 washer

X 4

(Local

supply)

X 4

M10 Nut

M10 SP. washer

M10 washer

X 4

(Local

supply)

X 4

1-3 mm

(G)

E F

NOTE:

• Throughly study the following installation locations:

1. In places such as restaurant and kitchen, considerable amount of oil steam and flour adhere to the fan, the fins of the heat

exchanger, resulting in heat exchange reduction, spraying, dispersing of water drops, etc.

In such cases, take the following actions:

• Make sure that the ventilation fan for smoke-collecting hood on a cooking table has sufficient capacity so that it draws oily

steam which should not flow into the suction of the air conditioner.

• Make enough distance from a cooking room to install the air conditioner in such a place where it may not suck in oil steam.

2. Avoid installing air conditioner in such circumstances where cutting oil mist or iron powder is in suspension in factories,etc.

3. Avoid places where inflammable gas is generated, flows in, is stored or vented.

4. Avoid places where sulfurous acid gas or corrosive gas is generated.

5. Avoid places near high frequency generators.

–15–

3. The Indoor Unit Installation

• Select and mark the position for fixing bolts.

• Drill the hole for set anchor on the face of ceiling.

• Insert the set anchor and washer onto the suspen-

sion bolts for locking the suspension bolts on the ceil-

ing.

• Mount the suspension bolts to the set anchor firmly.

• Secure the installation plates onto the suspension

bolts (adjust level roughly) using nuts, washers and

spring washers.

4. Remote Controller Installation

• Although the room temperature sensor is in the indoor unit, the remote controller should be installed

in such places away from direct sunlight and high humidity.

Installation of the remote controller

• Select places that are not splashed with water.

• Select control position after receiving customer's consent.

• The room temperature sensor is built in the indoor unit.

• This remote controller equipped with liquid crystal display. If this position is higher or lower, display is difficult

to see.(The standard height is 1.2 ~ 1.5m high)

Routing of the remote controller cord

• Keep the remote controller cord away from the refrigerant pipe and drain pipe.

• To protect the remote controller cord from electrical noise, place the cord at least 5cm away from other power

cables (audio equipment, television set, etc.)

• If the remote controller cord is secured to the wall, provide a trap at the top of the cord to prevent water

droplets from running.

Tighten the nut and bolt to prevent the unit from falling.

CAUTION

1 Set anchor

Old building New building

2 Plate washer

3 Spring washer

4 Nut

5 Suspension

bolts

• Local supply

Set anchor

Plate washer - M10

Spring washer - M10

Nut - W3/8 or M10

Suspension bolt - W3/8 or M10

–16–

Remote control

box body

Cord clamp

(accessory)

Lever carefully

the box open

using a screw

driver, etc.

Front case

The lower part

Face of wall

Under plate

Screw (accessory)

Remove the battery cover from the remote con-

troller.

• Slide the cover according to the arrow direction.

Insert the two batteries.

• Be sure that the (+) and (-) directions are correct.

• Be sure that both batteries are new.

Re-attach the cover.

• Slide it back into position.

• Fix the under plate on the wall

• Separate the under plate from Remote control box.

• Fix the cord clamps on the wall by ø 3 tapping

screws (accessory).

• Fix the remote control cord.

WIRED REMOTE CONTROL INSTALLATION

REMOTE CONTROL PREPARATION(OPTIONAL)

DISASSEMBLING

ELECTRICAL WIRING

HOW TO MOUNT ONTO A WALL

HOW TO INSERT BATTERIES

Wire and make sure that terminal

numbers are matched on unit side and

remote controller side.

The maximum length of the cord is 100m.

If the length of the cord exceeds 50m,

use a wire size greater than 0.5mm

Remote controller

(Main board)

CN REMO

• Do not use rechargeable batteries,

such batteries differ from standard dry

cells in shape, dimensions, and per-

formance.

• Remove the batteries from the remote

controller if the air conditioner is not

going to be used for some long time.

HOW TO INSERT BATTERIES

5. Connecting Cables between Indoor Unit and Outdoor Unit

–17–

1) Connecting cables to the Indoor Unit

Connect the wires to the terminals on the control board individually according to the

outdoor unit connection.

• Ensure that the color of the wires of outdoor unit and the terminal No. are the same as

) Clamping of cables

Make sure that the terminal screws are not loose.

WARNING

1) Arrange 2 power cables on the control panel.

2) First, fasten the steel clamp with a screw to the inner boss of control panel.

3) For the cooling model, fix the other side of the clamp with a screw strongly.

For the heat pump model, put the 1.25mm

cable(thinner cable) on the clamp and tighten it with a

plastic clamp to the other boss of the control panel.

4) In Australia, the length of power supply cord measured from the entry of the power supply cord to the

middle of live pin on the power plug should be over 1.8m.

If the supply cord is damaged, it must be replaced by a special cord or assembly availible from the manufacturer of its service agent.

CAUTION

2 0 m m

N/YLG

NORMAL

CROSS-SECTIONAL

AREA 0.75mm

(18k/24k/30k/36k/42k)

1.25mm

(48k/60k)

Capacity

48kBtu/h

1 Phase

3 Phase

3.5mm

NORMAL CROSS-SECTIONAL AREA

The connecting cable connected to the indoor and outdoor unit should be

complied with the following specifications (Rubber insulation, type H05RN-

F approved by HAR or SAA).

The power cord connected to the outdoor unit should be complied with

the following specifications (Rubber insulation, type H05RN-F approved by

HAR or SAA).

Therminals on the indoor unit

1(L) 2(N) 3

POWER INPUT

S T N

Therminals on the outdoor unit

1(L) 2(N) 3

(380-415V 3N~ 50Hz)

•

Heating Pump type

48k Btu/h

–18–

Outdoor

Indoor

Control terminal board

Control box

Control box cover

(On which the Electric

Wiring Connection is put)

Main terminal board

Control terminal board

Cover control

A A view

Remote

control cord

Connection

cord between

the indoor unit

and the

outdoor unit

Cord clamper

Main

power source

Switch box

Circuit Breaker

Use a 35A(60K)

circuit breaker or time

delay fuse.

ELECTRICAL WIRING

INDOOR UNIT

• Remove the control box cover for electrical con-

nection between the indoor and outdoor

unit.(Remove two screws

• Use the cord clamper to fix the cord.

Perform the electrical wiring work according to the electrical wiring

connection.

• All wiring must comply with local requirements.

• Select a power source that is capable of supply-

ing the current required by the air conditioner.

• Use a recognized circuit breaker between the

power source and the unit. A disconnection

device to adequately disconnect all supply lines

must be fitted.

WIRING CONNECTION

OUTDOOR UNIT

• Remove the control cover for wiring connection.

• Use the cord clamper to fix the cord.

• Earthing work

Connect the cable of diameter 1.6mm

or more to

the earthing terminal provided in the control box

and do earthing.

Please check !!

Capacity 1 Phase 3 Phase

48kBtu/h - 30A

–19–

• Preparation of Piping

6. Connecting Pipes to the Indoor Unit

–20–

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LG TBNH488RSS5.ANWBAEC User guide

Brand: LG

Model: TBNH488RSS5.ANWBAEC

Category: Split-system air conditioners

Type: User guide

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LG TBNH488RSS5.ANWBAEC User guide

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