Fujitsu AOU48RLXFZ Service manual

VD014E/06

FUJITSU GENERAL LIMITED

DESIGN & TECHNICAL MANUAL

Hybrid Flex Inverter System

DTR_BMU001E_05

CONTENTS

1. GENERAL INFORMATION

2. MODEL SELECTION

3. OUTDOOR UNITS

4. INDOOR UNITS

5. CONTROL SYSTEM

6. SYSTEM DESIGN

7. OPTIONAL PARTS

1. GENERAL INFORMATION

DTR_BMU001E_03--CHAPTER01

2010.08.25

Hybrid Flex Inverter System

CONTENTS

1. GENERAL INFORMATION

1. FEATURES OF SYSTEM .............................................................01 - 01

1-1.HIGH EFFICIENCY & COMPACT ............................................................. 01 - 01

1-2.FLEXIBLE DESIGN & EASY INSTALLATION.......................................... 01 - 02

1-3.CENTRAL CONTROL ............................................................................... 01 - 05

2. MODEL LINE UP..........................................................................01 - 07

2-1.OUTDOOR UNIT ....................................................................................... 01 - 07

2-2.INDOOR UNIT ........................................................................................... 01 - 08

2-3.CONTROLLER .......................................................................................... 01 - 09

2-4.SEPARATION TUBE ................................................................................. 01 - 10

2-5.BRANCH BOX........................................................................................... 01 - 10

2-6.OTHERS ....................................................................................................01 - 11

FEATURES OF SYSTEM1.

HIGH EFFICIENCY & COMPACT1-1.

HIGH EFFICIENCY



Adopting a large heat exchanger, high efﬁciency ventilation fan, DC twin rotary compressor,

etc. realizes high efﬁciency operation.

Cooling Heating

SEER HSPF15.0 16.00.0 17.0

3.89

8.0 9.00.0 10.0

SEER:17.0 HSPF:9.8

TOP CLASS

TOP CLASS COMPACT DESIGN



Compact and lightweight outdoor unit is easy to carry in, it can be installed unnoticeably in

various places.

50-25/32in.

(1290mm) 36in.

(914mm)

About 48000Btu class New model Height difference

29%

INNOVATIVE TECHNOLOGY



High efficiency

DC twin rotary Compressor:

A high perforamnce, low noise,

large capacity DC twin rotary

compressor is used.

Heat exchanger:

Reduced compact size and

energy saving has been

realized by utilizing high

density piping design and

3-Row heat exchanger.

High efficiency large fan:

New high efficiency fan is

mounted.

DC Fan motor:

High performance and high

7 segment display:

Easy –to-read 7 segment LED

display which explains

operational and trouble status.

efficiency has been realized

by using a small DC fan

motor.

1. GENERAL INFORMATION

- (01 - 01) -

GENERAL

INFORMATION

GENERAL

INFORMATION

FLEXIBLE DESIGN & EASY INSTALLATION1-2.

FLEXIBLE DESIGN



4 types, 12models of indoor units can be selected ranging from 7000BTU to 24000BTU in●

capacity.

Compact Cassette Slim Duct Compact Wall Mounted Wall Mounted

Up to 8 indoor units can be connected to one outdoor unit.●

A maximum of 130% indoor unit connectable capacity. Match any room layout.●

Connectable indoor unit capacity

80 to 130% 2 to 8

Connectable indoor unit

For any room layout-connectable capacity of indoor units is max 130%

Total pipe length Actual pipe length

377ft. max

(115m)

230ft. max

(70m)

Can be installed in high rise condominium or commercial building.

• Height difference between O.U and I.U 98ft.(30m) max.

• Height difference between I.U and I.U 49ft. (15m) max.

1. GENERAL INFORMATION

- (01 - 02) -

GENERAL

INFORMATION

GENERAL

INFORMATION

EASY INSTALLATION



Corresponding to diverse installation environments by use of branch connection system.●

Current model : 4 Rooms multi x 2

New model

Branch box

BRANCH BOX



Branch box has an electronic expansion valve built-in, so it can control the refrigerant flow to●

each indoor unit.

Can be connected by flare connection and both ceiling suspension and wall mounting●

installation are available.

Primary type: UTP-PU03A

Secondary type: UTP-PU03B

Allowed branch box mounting direction



Ceiling suspension Horizontal wall mounted Vertical wall mounted

By reversing the electrical

box position you can orient

the inlet and outlet pipes

into a left hand or right hand

conﬁguration,

By reversing the electrical

box position you can orient

the inlet and outlet pipes

into a left hand or right hand

conﬁguration.

You cannot reverse the

electrical box position when

mounting the branch box

vertically.

1. GENERAL INFORMATION

- (01 - 03) -

GENERAL

INFORMATION

GENERAL

INFORMATION

DECREASE OF INSTALLATION MISTAKE



This operation allows the air conditioner to automatically check the status of the outdoor unit●

and check for wiring mistakes.

Installation procedure



Refrigerant piping and electrical

wiring work

Sealing test

Vacuum process

Additional refrigerant charging

Indoor unit function setting

Check run

Test run

All Flare

connection

Refrigerant piping

& Electric wiring

Installation mistakes and positions where errors are occurring are shown

by the outdoor unit display indicators.

Check item



Check communication●

Check the number of connected indoor units●

Check wiring and piping connection●

SERVICE MAINTENANCE



7 segment LED display



Example

Easy –to-read 7 segment

LED display which explains

operating and trouble status.

Operation mode Error display Operating

information

1. GENERAL INFORMATION

- (01 - 04) -

GENERAL

INFORMATION

GENERAL

INFORMATION

CENTRAL CONTROL1-3.

Support comfort control system for the varied needs of the home and the condominium, etc.

Central remote controller is connected directly to the branch box, making the installation●

process easier.

Once the controller is connected, it can automatic register and display all the indoor units.●

CENTRAL REMOTE CONTROLLER (Option)



Controllable

1Multi system

Max. controllable

8indoor units

UTY-DMMUM

Large and full-dot liquid crystal screen●

Screen with backlight can be seen even in the dark●

Wide and large keys easy to press, user-intuitive arrow key●

1. GENERAL INFORMATION

- (01 - 05) -

GENERAL

INFORMATION

GENERAL

INFORMATION

VARIOUS OPERATION MODES SET BY REMOTE CONTROLLER



Outdoor unit low noise operation



Users can choose from 4 low●

noise levels, depending on the

installation environment.

100%

58dB

Heat load

Air

conditioning

load factor

Low noise operation

Operating

sound

Capacity Down

(time)

Minimum heat (All) operation



While this function is selected, all indoor●

units start the minimum heat operation

when all the indoor units are stopped by

operation of the [On/Off button].

When the room temperature is higher than●

50°F (10°C), MIN. HEAT operation starts

and maintains the room temperature at

50°F (10°C) when the temperature drops

below 50°F (10°C).

When “MIN, HEAT operation stops, the●

room set temperature quickly returns to

the preset temperature.

50°F

70°F

Indoor unit

operation START

“All MIN. HEAT”

operation

All indoor units

OFF

Economy (All) operation



Example : Cooling operation

If all the indoor and outdoor units are●

changed to economy mode, this can

save more energy than setting of each

indoor unit individually.

Economy operation is energy saving,●

as the set temperature of indoor unit is

shifted by 2°F (1°C) and the maximum

electric value of the outdoor unit is

suppressed.

Temp.

Economy operation

Shift

setting

temp

Control maxmum current

Nomal operation Time

Set temperature

Schedule timer



Example

Operation setting can be changed●

4 times in each day of a week, and

2types of the schedule can be set

to suit users' preference.

yadnuS~yadrutaSyadirF~yadnoM

AM7

AM7 AM7PM12 PM1 PM1 PM6PM11 PM11

AM8PM12 PM1 PM6 PM10PM5 PM11 Time

Temp.Temp.

Time

Summer

season

pattern

Winter

season

pattern

Cool Cool Cool Cool Cool Cool

Heat

Heat Heat Heat Heat

1. GENERAL INFORMATION

- (01 - 06) -

GENERAL

INFORMATION

GENERAL

INFORMATION

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