Lennox LIUH018021T431E-1 User manual

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Service Manual
LIUH018021T431E-1
LIUH024021T431E-1
LIUH036021T431E-1
LIUH048021T431E-1
LIUH060021T431E-1
LIFHC018021T431E-1
LIFHC024021T431E-1
LIFHC036021T431E-1
LIFHC048021T431E-1
LIFHC060021T431E-1
LIFHC012021T431E-1
LICH4018021T431E
LICH4024021T431E-1
LICH4036021T431E-1
LICH4048021T431E-1
LICH4060021T431E-1
LICH4012021T431E-1
LIHP012000T431E
LIHP018000T431E
LIHP024000T431E
LIHP036000T431E
LIHP036000M431E
LIHP048000T431E
LIHP048000M431E
LIHP060000M431E

Contents
Part 1 General Information .................................................................................................... 1
Part 2 Indoor Units ................................................................................................................. 4
Part 3 Outdoor Units ............................................................................................................ 63
Part 4 Installation ................................................................................................................. 76
Part 5 Electrical Control System ....................................................................................... 106
※The specifications, designs, and information in this book are subject to change without notice for
product improvement.

General Information
General Information 1
Part 1
General Information
1. Model Lists...........................................................................................2
2. External Appearance ...........................................................................3
2.1 Indoor Units............................................................................................................... 3
2.2 Outdoor Units............................................................................................................ 3

Indoor Units
Indoor Units 2
1. Model Lists
1.1 Indoor Units
R410A (capacity multiplied by 1000Btu/h)
Type Function 12 18 24 36 48 55
Super slim cassette Cooling and heating ●●●●
A6 Duct Cooling and heating ●●●●●●
Ceiling-floor Cooling and heating ●●●●●
Four-way
cassette(compact) Cooling and heating ●●
1.2 Outdoor Units
Universal Outdoor unit Model Compressor type Compressor Brand Matched indoor units
LIHP012000T431E Rotary GMCC LIFHC012021T431E-1
LICH4012021T431E-1
LIHP018000T431E Rotary GMCC LIUH018021T431E LIFHC018021T431E-1
LICH4018021T431E
LIHP024000T431E Rotary GMCC LIUH024021T431E-1 LIFHC024021T431E-1
LICH4024021T431E-1
LIHP036000T431E Rotary GMCC LIUH036021T431E-1
LIFHC036021T431E-1
LICH4036021T431E-1
LIHP036000M431E Rotary GMCC
LIHP048000T431E Rotary GMCC LIUH048021T431E-1
LIFHC048021T431E-1
LICH4048021T431E-1
LIHP048000M431E Rotary GMCC
LIHP060000M431E Rotary GMCC LIUH060021T431E-1 LIFHC060021T431E-1
LICH4060021T431E-1

Indoor Units
Indoor Units 3
2. External Appearance
2.1 Indoor Units
Super slim cassette
Duct
Ceiling-Floor Compact Four-way cassette
2.2 Outdoor Units
Single fan outdoor unit Double fan outdoor unit

Indoor Units
Indoor Units 4
Part 2
Indoor Units
Super Slim Cassette Type ....................................................5
A6 Duct Type ......................................................................20
Ceiling & Floor Type ..........................................................38
Four-way Cassette Type (Compact) .................................53

Super Slim Cassette Type
Indoor Units 5
Super Slim Cassette Type
1. Features ...........................................................................6
2. Dimensions ......................................................................9
3. Service Space ................................................................10
4. Wiring Diagrams ............................................................11
5. Air Velocity Distributions (Reference Data).................12
6. Electric Characteristics.................................................15
7. Sound Levels .................................................................16
8. Accessories....................................................................17
9. The Specification of Power ...........................................18
10. Field Wiring ..................................................................19

Features
Indoor Units 6
1. Features
1.1Overview
➢Compact design, super slim body size, less space requiring in installation
➢Each louver can be separately controlled, more comfort air blowing is possible.
➢Auto-lifting panel design, more convenient to clean and maintain the filter. (optional)
1.2 Fresh air intake function
➢Fresh air fulfills air quality more healthy and comfortable.
➢Ventilation motor is optional to increase the effect of fresh air.
1.3Optional ionizer generator
➢Ionizer generator is optional to get refreshing air to your room.
➢Ionizer can be switched on or off by remote controller.
When pressing the Clean Air button on the remote controller, Ionizer will work and the indicator light on
display board will shine.
1.4 External air duct design
➢Reserve external air duct, more flexible for the air supply.
Ionizer generator
connector
Ventilation motor
connector

Features
Indoor Units 7
1.5 Built-in draining pump
➢Due to the improvement of structure, more convenient to repair or replace the draining pump.
➢Built-in draining pump to make sure condensed water drain out reliably.
1.6Terminals for alarm lamp and long-distance on-off controller connection are
standard
➢Reserve terminals for the connection of alarm lamp and long-distance on-off controller, more human
control.
Draining Pump

Features
Indoor Units 8
1.7Twins Combination(18k-30k)
➢The units can be installed as Twin systems: one outdoor unit can connect with two indoor units. The
indoor units can be combined in any of the different available ratings.
Alarm lamp
Long-distance on-off controller