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.
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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