LG LG3ZMSS30, LG3ZMSS150, LG2ZMSS02 Specs

Please read this manual carefully before operating your set and retain it for future reference.
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Multi Air Conditioner
A4UW30GFH0 [LMU300HHV] / A3UW24GFH0 [LMU240HHV]
A2UW18GFH0 [LMU180HHV]

P/NO : MFL67452453

SERVICE MANUAL

AIR
CONDITIONER

CONFIDENTIAL

Any reproduction, duplication, distribution (including by way of email, facsimile or other electronic means), publication,
modification, copying or transmission of this Service Manual is STRICTLY PROHIBITED unless you have obtained the prior
written consent of the LG Electronics entity from which you received this Service Manual. The material covered by this
prohibition includes, without limitation, any text, graphics or logos in this Service Manual.

Copyright © 2017 LG Electronics Inc. All rights reserved. Only training and service purposes.

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1. Specification

Note:

1. All data are based on the following conditions:

- Cooling Temperature : Indoor 26.7°C(80°F) DB / 19.4°C(66.9°F) WB
Outdoor 35°C(95°F) DB / 23.9°C(75°F) WB

- Heating Temperature : Indoor 21.1°C(70°F) DB / 15.6°C(60.1°F) WB
Outdoor 8.3°C(46.9°F) DB / 6.1°C(43°F) WB

- Piping Length : Interconnected Pipe Length = 5 m (16.4 ft)

- 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(maximum 3dB(A)) owing to ambi­ent conditions during opration.

** : The unit could be operated on the followig temperature range only when Low

Ambient Kit installed.

- Cooling : Outdoor Temperature -20°C(-4°F) ~ -10°C(14°F) DB

Model Name

A2UW18GFH0
[LMU180HHV]

A3UW24GFH0
[LMU240HHV]

A4UW30GFH0
[LMU300HHV]

Capacity

Nominal Btu/h Class

18,000 24,000 30,000

Cooling Min~Rated~Max Btu/h

8400~18000~19980 8400~24000~30000 8400~28400~34080

Heating Min~Rated~Max Btu/h

10248~22000~24000 10248~26000~31200 10248~28600~41600

Power Input

Cooling Min~Rated~Max kW

0.87~1.33~1.92 0.93~1.78~2.63 0.94~2.27~3.47

Heating Min~Rated~Max kW

1.24~2.20~3.29 1.25~2.12~3.47 1.29~2.32~3.55

EER/COP Non Ducted -

13.5/2.9 13.5/3.6 12.5/3.6

SEER/HSPF

Non Ducted -

21.0/10.0 21.0/10.7 20.0 / 11.0

Mixed -

19.25/9.5 19.0/9.85 18.75/10.25

Ducted -

17.5/9.0 17.0/9.0 17.5/9.5

Power Supply V, Ø, Hz

208/230, 1, 60 208/230, 1, 60 208/230, 1, 60

Running Current

Cooling Min~Rated~Max A

4.1~6.1~8.7 4.2~7.8~11.9 4.0~10.2~16.7

Heating Min~Rated~Max A

5.6~9.8~14.9 4.8~9.9~14.9 4.2~10.9~15.9

Starting Current

Cooling Max A

- - -

Heating Max A

- - -

Wiring Connections

Power Supply Cable (Included Earth) No. x AWG

3C x 12 3C x 12 3C x 12

Power and Communication Cable
(Included Earth)

Outdoor ~ BD Unit No. x AWG

- - -

Combination

Sum of Indoor Units Capacity Max kBth/h

24 33 40

Number of Indoor Units Max EA

2 3 4

Number of BD Units Max EA

- - -

Casing Color -

Warm Gray Warm Gray Warm Gray

Dimensions

W x H x D mm

950 x 834 x 330 950 x 834 x 330 950 x 834 x 330

W x H x D inch

37-13/32 x 32-27/32 x 13 37-13/32 x 32-27/32 x 13 37-13/32 x 32-27/32 x 13

New Weight kg(lbs)

67 (147.7) 69 (152.1) 69 (152.1)

Compressor

Type -

Twin Rotary Twin Rotary Twin Rotary

Model Model x No.

GJT325M X 1 GJT325M X 1 GJT325M X 1

Motor Type -

BLDC BLDC BLDC

Motor Output W x No.

- - -

Refrigerant

Type -

R410A R410A R410A

Precharged Amount g (oz)

2,800 (98.8) 3,200 (112.8) 3,200 (112.8)

Chargeless-Pipe Length m (ft)

15 (49.2) 22.5 (73.8) 30 (98.4)

Additional Charging Volume g/m (oz/ft)

20 (0.22) 20 (0.22) 20 (0.22)

contorl -

Electronic Expansion Valve Electronic Expansion Valve Electronic Expansion Valve

Refrigerant Oil

Type -

FVC68D FVC68D FVC68D

Charged volume cc x No.

950 x 1 950 x 1 950 x 1

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

(3 x 38 x 16) x 1 (3 x 38 x 16) x 1 (3 x 38 x 16) x 1

Fan

Type -

Propeller Propeller Propeller

Air Flow Rate m3/min(ft3/min) x No.

65 (2,295) 65 (2,295) 65 (2,295)

Fan Motor

Type -

BLDC BLDC BLDC

Output W x No.

124.2 x 1 124.2 x 1 124.2 x 1

Sound Pressure Level

Cooling Rated dB(A)

50 52 52

Heating Rated dB(A)

54 55 55

Sound Power Level Cooling Rated dB(A)

- - -

Piping Connections

Liquid Outer Dia. mm(inch)

Ø6.35 (1/4) Ø6.35 (1/4) Ø6.35 (1/4)

Gas Outer Dia. mm(inch)

Ø9.52 (3/8) Ø9.52 (3/8) Ø9.52 (3/8)

Piping Length

Total Piping Max. m (ft)

50 (164) 75 (246.1) 75 (246.1)

Main Piping Max. m (ft)

- - -

Total Branch Piping Max. m (ft)

- - -

Each Branch Piping Max. m (ft)

25 (82.0) 25 (82.0) 25 (82.0)

Maximum Height
Difference

Outdoor Unit ~ Indoor Unit Max. m (ft)

15 (49.2) 15 (49.2) 15 (49.2)

Indoor Unit ~ Indoor Unit Max. m (ft)

7.5 (24.6) 7.5 (24.6) 7.5 (24.6)

BD Unit ~ Indoor Unit Max. m (ft)

- - -

Operation Range
(Outdoor Temperature)

Cooling Min. ~ Max. ℃ DB(℉ DB)

-20(-4)** ~ 48(118) -20(-4)** ~ 48(118) -20(-4)** ~ 48(118)

Heating Min. ~ Max. ℃ DB(℉ DB)

-25 (-13) ~ 24 (75) -25 (-13) ~ 24 (75) -25 (-13) ~ 24 (75)

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2. List of Functions & Accessory

Note :

O : Applied, × : Not applied

2.2 List of Accessory

2.1 List of Functions

Note :

O : Applied, × : Not applied
Accessory model name : Installed at field, ordered and purchased separately by the corresponding model name, supplied with separate package.

Category Functions

A4UW30GFH0[LMU300HHV]
A3UW24GFH0[LMU240HHV]
A2UW18GFH0[LMU180HHV]

Reliability

Defrost/Deicing

O

High pressure switch

X

Low pressure switch

X

Phase protection

X

Restart delay (3-minutes)

O

Self diagnosis

O

Soft start

O

Test function

X

Convenience

Night Silent Operation

O

Wiring Error Check

O

Peak Control

O

Mode Lock

O

Forced Cooling Operation (Outdoor Unit)

O

Network function Network soluation(LGAP)

O

Device

A4UW30GFH0[LMU300HHV]
A3UW24GFH0[LMU240HHV]
A2UW18GFH0[LMU180HHV]

Central Controller

AC Ez (Simple Controller) PQCSZ250S0

AC Ez Touch PACEZA000

AC Smart IV PACS4B000

ACP IV PACP4B000

AC Manager IV PACM4B000

PI485 PMNFP14A0/PMNFP14A1

BNU (Building Network Unit)

LONWORKS Gateway PLNWKB000

BACnet Gateway PQNFB17C0

Installation

Y branch X

Header branch X

Air Guide X

PDI (power distribution indicator) PQNUD1S00

ODU Dry Contact X

Low Ambient Kit O (Logical operation)

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3. Piping Diagrams

PCB Connector Description

CN_MID_BR Cond Middle Pipe

CN_DISCHARGE_BK Discharge Pipe

CN_C_PIPE_VI Cond Out Pipe

CN_SUCTION_GR Suction Pipe

CN_AIR_YL Air

CN_H_PRESS_RD Pressure Sensor

CN_H_GAS_BK Hot Gas Valve

CN_4WAY_YL 4WAY valve

CN_HEATER_BL Base pan heater

3.1 30k

ROOM A

ROOM B

Field Piping
Liquid(Ø6.35)

Field Piping
Gas(Ø9.52)

ROOM C

ROOM D

ROOM A

ROOM B

ROOM C

ROOM D

Outdoor Unit

Ø 6.35
Flare Connection

Electronic

Expansion

Valve

Main SVC V/V

Pressure
Sensor

Ø9.52
Flare Connection

Main SVC V/V

Suction

Temperature

Thermistor

Condenser Out

Temperature

Thermistor

Inlet Air

Temperature

Thermistor

Discharge

Temperature

Thermistor

M

Condensing

Temperature

Thermistor

Accumulator

: Cooling
: Heating

Inverter

Compressor

- 5 -

PCB Connector Description

CN_MID_BR Cond Middle Pipe

CN_DISCHARGE_BK Discharge Pipe

CN_C_PIPE_VI Cond Out Pipe

CN_SUCTION_GR Suction Pipe

CN_AIR_YL Air

CN_H_PRESS_RD Pressure Sensor

CN_H_GAS_BK Hot Gas Valve

CN_4WAY_YL 4WAY valve

CN_HEATER_BL Base pan heater

3.2 24k

Field Piping
Liquid(Ø6.35)

Field Piping
Gas(Ø9.52)

ROOM A

ROOM B

ROOM C

ROOM A

ROOM B

ROOM C

Outdoor Unit

Ø 6.35
Flare Connection

Electronic
Expansion

Valve

Main SVC V/V

Pressure
Sensor

Ø9.52
Flare Connection

Main SVC V/V

Suction

Temperature

Thermistor

Condenser Out

Temperature

Thermistor

Inlet Air

Temperature

Thermistor

Discharge

Temperature

Thermistor

M

Condensing

Temperature

Thermistor

Accumulator

: Cooling
: Heating

Inverter

Compressor