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
0
0
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
ON
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. Temp.Temp.
Time
Time
Time
Summer
season
pattern
Winter
season
pattern
Cool Cool Cool Cool Cool Cool
Heat
Heat
Heat Heat Heat Heat
1. GENERAL INFORMATION
- (01 - 06) -
GENERAL INFORMATION GENERAL INFORMATION

MODEL LINE UP2.
OUTDOOR UNIT2-1.
LINE UP

HP Capacity Model name Connectable
indoor unit
(BTU/h)
5 48000 AOU48RLXFZ 2 to 8
MODEL DESIGNATION

A O U 4 8 R L X F Z
1 23 4567 8910
Type
AO : Outdoor unit
Destination
U: FUJITSU
Function
L: Inverter
Function
R: Heat
pump
Function
X:
Extended
line set
Function
Z: Zoning
Function
F: Flexible
Model code
(BTU/h)
48 : (48000)
1. GENERAL INFORMATION
- (01 - 07) -
GENERAL INFORMATION GENERAL INFORMATION

INDOOR UNIT2-2.
LINE UP

Various combinations of types and capacity 4 types 12 models, ranging from 7000BTU to
24000BTU.
Capacity Compact
Cassette Slim Duct Compact
Wall Mounted Wall Mounted
BTU/h Model
code
7000 7
9000 9
12000 12
18000 18
24000 24
Compact Cassette Slim Duct Compact Wall Mounted
AUU9RLF
AUU12RLF
AUU18RLF
ARU9RLF
ARU12RLF
ARU18RLF
ARU24RLF
ASU7RLF
ASU9RLF
ASU12RLF
Wall Mounted
ASU18RLF
ASU24RLF
MODEL DESIGNATION

Function
L: Inverter
Function
R: Heat
pump
Function
F: Flexible
A S U 1 8 R L F
12345678
Type
AU: Cassette
AR: Duct
AS: Wall Mounted
Destination
U: FUJITSU
Model code
(BTU/h)
7 (7000)
9 (9000)
12 (12000)
18 (18000)
24 (24000)
1. GENERAL INFORMATION
- (01 - 08) -
GENERAL INFORMATION GENERAL INFORMATION

CONTROLLER2-3.
LINE UP

Type Model
Indoor units
Compact
Cassette Slim Duct
Compact
Wall
mounted
Wall
mounted
Central remote controller UTY-DMMUM *1 *1 *1 *1
Wired Remote Controller UTY-RNNUM  *2 
Wireless Remote Controller UTY-LNHUM --

AR-RAH1U - - -
IR Receiver Unit UTY-LRHUM - --
Simple Remote Controller UTY-RSNUM  *2 
: Accessory, : Optional, -: It is not possible to connect it.
*1: Central remote controller is connected to Branch Box.
*2: Optional Communication kit (UTY-XCBXZ1) is necessary for the installation.
CENTRAL CONTROL

Central remote controller
INDIVIDUAL CONTROL

Wired Remote Controller Simple Remote Controller Wireless Remote Controller
IR Receiver Unit
UTY-LNHUM AR-RAH1U
1. GENERAL INFORMATION
- (01 - 09) -
GENERAL INFORMATION GENERAL INFORMATION

SEPARATION TUBE2-4.
Separation tube
Model : UTP-SX248A
Liquid pipe Gas pipe
BRANCH BOX2-5.
Primary type
Model : UTP-PU03A
Secondary type
Model : UTP-PU03B
1. GENERAL INFORMATION
- (01 - 10) -
GENERAL INFORMATION GENERAL INFORMATION

OTHERS2-6.
LINE UP

Type Model
Indoor units
Outdoor
unit
Compact
Cassette Slim Duct
Compact
Wall
mounted
Wall
mounted
Grill kit UTG-CCGF ----
Air outlet shutter plate UTR-YDZB ----
Insulation kit for high humidity UTZ-KXGC ----
Fresh air intake kit UTZ-VXAA ----
External control set UTD-ECS5A - ---
External connect kit UTY-XWZX -*1 -
Externalconnectkit UTY-XWZXZ3----

External connect kit
(For Base heater) UTY-XWZXZ4----

Apple catechin filter UTR-FA16 - - --
UTR-FA13-1---
-
Ion deodorisation filter UTR-FA16-2 - - --
UTR-FA13-2---
-
Communication kit UTY-XCBXZ1 - - --
: Optional, -: It is not possible to connect it.
*1: Optional Communication kit (UTY-XCBXZ1) is necessary for the installation
1. GENERAL INFORMATION
- (01 - 11) -
GENERAL INFORMATION GENERAL INFORMATION

PARTS

Air outlet shutter plate
Models : UTR-YDZB
For Compact Cassette type
Grille kit
Model : UTG-CCGF
For Compact Cassette type
Insulation kit for high humidity
Model : UTZ-KXGC
Insulation
Kit
For Compact Cassette type
Fresh air intake kit
Model : UTZ-VXAA
For Compact Cassette type
External control set
Model : UTD-ECS5A
( x 1 ) ( x 2 )
( x 1 ) ( x 2 )
For Slim Duct type
External connect kit
Model : UTY-XWZX
( x 1 ) ( x 1 )
For Compact Cassette / Compact Wall Mounted / Wall
Mounted
External connect kit
Model : UTY-XWZXZ3
For Outdoor unit
External connect kit
(For Base heater) Model : UTY-XWZXZ4
For Outdoor unit
1. GENERAL INFORMATION
- (01 - 12) -
GENERAL INFORMATION GENERAL INFORMATION

PARTS

Apple catechin filter
Model : UTR-FA13-1
For Wall mounted type
Apple catechin filter
Model : UTR-FA16
For Compact wall mounted type
Ion deodorisation filter
Model : UTR-FA16-2
For Compact wall mounted type
Ion deodorisation filter
Model : UTR-FA13-2
For Wall mounted type
Communication kit
Model : UTY-XCBXZ1
For Compact wall mounted type
1. GENERAL INFORMATION
- (01 - 13) -
GENERAL INFORMATION GENERAL INFORMATION

2. MODEL SELECTION
DTR_BMU001E_04--CHAPTER02
2010.10.04
Hybrid Flex Inverter System

CONTENTS
2. MODEL SELECTION
1. MODEL SELECTION PROCEDURE............................................02 - 01
2. MODEL LINE UP..........................................................................02 - 02
2-1.OUTDOOR UNIT ....................................................................................... 02 - 02
2-2.INDOOR UNIT ........................................................................................... 02 - 02
2-3.OPTIONAL PARTS.................................................................................... 02 - 02
3. MODEL SELECTION AND CAPACITY CALCULATION .............02 - 04
3-1.SELECTION PROCEDURE OF INDOOR UNIT AND OUTDOOR UNIT .. 02 - 04
3-2.THE EXAMPLE OF CALCULATION......................................................... 02 - 05
3-2-1. COOLING EXAMPLE ..............................................................................................02 - 05
3-2-2. HEATING EXAMPLE ...............................................................................................02 - 09
4. CAPACITY TABLE .......................................................................02 - 13
4-1.COOLING CAPACITY ............................................................................... 02 - 13
4-2.HEATING CAPACITY ................................................................................ 02 - 15
5. CAPACITY COMPENSATION COEFFICIENT.............................02 - 17
5-1.COMPENSATION COEFFICIENT OF PIPE LENGTH.............................. 02 - 17
5-2.COMPENSATION COEFFICIENT OF FROSTING / DEFROSTING......... 02 - 18

2. MODEL SELECTION
MODEL SELECTION PROCEDURE1.
Selection of indoor units See 2-2.MODEL LINE UP(INDOOR UNIT) and
3-1. SELECTION PROCEDURE OF INDOOR UNIT AND
OUTDOOR UNIT
See 2-3.MODEL LINE UP(OPTIONAL PARTS)
See 2-3.MODEL LINE UP(OPTIONAL PARTS)
See 2-3.MODEL LINE UP(OPTIONAL PARTS)
See 2-3.MODEL LINE UP(OPTIONAL PARTS)
See 2-3.MODEL LINE UP(OPTIONAL PARTS)
Selection of required optional parts
Grill kit for Compact Cassette type●
Selection of controller units
Central Remote Controller●
Wired Remote Controller●
Simple Remote Controller●
Wireless Remote Controller●
IR Receiver Unit●
Selection of Separation tube
END
Selection of other optional parts
Air Outlet Shutter Plate●
Insulation Kit for High humidity●
Fresh air intake kit●
External Control Set●
External Connect Kit●
Apple catechin filter●
Ion deodorisation filter●
Communication kit●
Selection of Branch box
- (02 - 01) -
MODEL SELECTION MODEL SELECTION