Fujitsu ARC72LHTA Service manual

DESIGN & TECHNICAL MANUAL
SINGLE
INDOOR
OUTDOOR
AOA72LALT
AOA90LALT
ARC72LHTA ARC90LHTA
AIR CONDITIONER
Duct type

1. INDOOR UNIT
DTR_AR061E_03
2013.11.08
DUCT TYPE :
ARC72LHTA
ARC90LHTA

DUCT TYPE ARC72-90LHTA DUCT TYPE ARC72-90LHTA
CONTENTS
1. INDOOR UNIT
1. FEATURES ........................................................................................................ 01 - 01
2. WIRED REMOTE CONTROLLER ................................................... 01 - 06
3. SPECIFICATIONS ........................................................................................ 01 - 08
4. DIMENSIONS................................................................................................... 01 - 09
5. WIRING DIAGRAMS.................................................................................. 01 - 12
6. CAPACITY TABLE....................................................................................... 01 - 13
6-1. COOLING CAPACITY ................................................................................ 01 - 13
6-2. HEATING CAPACITY ................................................................................. 01 - 14
7. FAN PERFORMANCE AND CAPACITY..................................... 01 - 15
8. OPERATION NOISE................................................................................... 01 - 19
8-1. NOISE LEVEL CURVE............................................................................... 01 - 19
8-2. SOUND LEVEL CHECK POINT ............................................................... 01 - 20
9. ELECTRIC CHARACTERISTICS..................................................... 01 - 21
10. SAFETY DEVICES....................................................................................... 01 - 22
11. EXTERNAL INPUT & OUTPUT ......................................................... 01 - 23
11-1. EXTERNAL INPUT...................................................................................... 01 - 23
11-2. EXTERNAL OUTPUT ................................................................................. 01 - 24
12. FUNCTION SETTINGS............................................................................. 01 - 29
12-1. INDOOR UNIT.............................................................................................. 01 - 29
12-2. INDOOR UNIT (Setting by remote controller) ..................................... 01 - 31
12-3. WIRED REMOTE CONTROLLER............................................................ 01 - 34
13. OPTIONAL PARTS...................................................................................... 01 - 35
13-1. CONTROLLER ............................................................................................ 01 - 35
13-2. OTHERS ....................................................................................................... 01 - 35

- (01 - 01) -
DUCT TYPE ARC72-90LHTA DUCT TYPE ARC72-90LHTA
FEATURES1.
MODEL

ARC72LHTA / AOA72LALT
ARC90LHTA / AOA90L ALT
FEATURES

Signicantly improved EER/COP
z
Signicantly improved Hi-efciency is realized by the use of a ALL-DC components, inverter
technology, and large heat exchanger.
Energy saving technology
z
OUTDOOR UNIT
INDOOR UNIT
Previous
model
Cooling Heating
New
model
EER2.0 3.00.0
CoolingEER
57%increase!
!
2.03
3.20
2.0 3.00.0 COP
Heating COP
44%increase!
2.36
3.40
(AR¾C90L) (AR¾C90L)
Surface area
1.7times!
New model
Power consumption
has been reduced
by 25% compared to
previous models by
using a compact and
high performance DC
fan motor.
High efciency
operation is
realized by
using a sine
wave DC
inverter control.
Signicantly
greater efciency
is realized by
use of a large
capacity DC twin
rotary compressor
with substantially
increased
refrigerant intake
and compression
efciency.
Heat exchange efciency is signicantly
improved by the introduction of a new
4-face heat exchanger that increases
effective surface area.
In multiple outdoor unit installations, the
unique front intake design improves airow
into the Heat exchanger.
Previous
model
ARC72LHTA
ARC90LHTA
The power consumption has
been reduced drastically by the
introduction of DC fan motors.

- (01 - 02) -
DUCT TYPE ARC72-90LHTA DUCT TYPE ARC72-90LHTA
Space saving and compact size
z
Compact size has been achieved by signicantly reducing the width of the outdoor units
compared to previous models.
Static pressure selection
z
5 Static Pressure modes are available.
Improvement and design exibility has allowed multiple fan speeds and static pressure modes.
The air ow rate has been improved to meet the requirements of complex ductwork layout designs.•
→ By introducing a new DC fan motor, the static pressure range selected by the installer can
range between 50 to 250Pa.
A three speed fan (High, Medium and Low) allows accurate airow control.•
A decrease in the power consumption of the indoor unit has been realised by optimizing the •
control of the indoor fan motor rotation frequency.
Low static pressure - High static pressure
Fan motor speed : Low speed - High speed
3900
0
50
100
150
200
250
300
4100 4300 4500 4700 4900 5100 5300 5500
Normal (72Pa)
LSP mode (50Pa)
HSP mode 1 (150Pa)
HSP mode 2 (200Pa)
HSP mode 3 (250Pa)
Static pressure (Pa)
Air flow (m3/h)
Max. 250Pa
Rating
(AR¾C90L)
]Efciency of the indoor unit operation has
been improved in both the static pressure and
air ow design.
1,300
930
28%
reduction
Previous model New model

- (01 - 03) -
DUCT TYPE ARC72-90LHTA DUCT TYPE ARC72-90LHTA
Outdoor unit quiet operation
z
Low noise mode (Optional parts: UTY-XWZXZ2)
Introduction of a low outdoor noise operation mode allow the outdoor unit to have two quiet mode
operation settings.
* Performance may drop depending on the outside air temperature condition, etc.
1) Level1 (Rated noise value -3dB)
2) Level2 (Rated noise value -5dB)
Peak cut operation
z
Peak cut mode (Optional parts: UTY-XWZXZ2)
The introduction of a peak power consumption mode control a 4 step outdoor operation control to
cut down energy usage at peak energy usage times.
* Performance drops by reducing the power consumption preferentially.
Level 1 ... Performs operation which suppresses the power consumption to almost 0% by stopping
the compressor.
Level 2 ... Performs operation which suppresses the power consumption to 50% of the rated
power consumption value.
Level 3 ... Performs operation which suppresses the power consumption to 75% of the rated
power consumption value.
Level 4 ... Performs operation which suppresses the power consumption to the rated power
consumption value (100%).

- (01 - 04) -
DUCT TYPE ARC72-90LHTA DUCT TYPE ARC72-90LHTA
Easy service & maintenance
z
Outdoor unit
Indoor unit
Consolidated electrical
components make maintenance
easy
Maintenance of electrical
components, valves, and
compressor parts from
the front is possible.
Movable PCB panel that allows for
easier maintenance work behind
the PCB
Split front panel allows for
maintenance from top or
bottom of the outdoor unit
Easy-to-read 7-segment LED display
which explains operational and
trouble status
Fan unit
Left and Right fan motors can be removed
separately which has made servicing of
the indoor unit easier.

- (01 - 05) -
DUCT TYPE ARC72-90LHTA DUCT TYPE ARC72-90LHTA
Adoption of blue n heat exchanger
z
Corrosion resistant of the heat exchanger has been improved by the introduction of blue n
treatment to the outdoor unit’s heat exchanger.
Improvement of piping length
z
Improvement of low outdoor ambient temperature performance
z
Blue fin heat exchanger
Standard chromate protection
Cobalt Blue protection
Aluminium base material
Hydrophilic coating
Previous model New model
50m 75m
Previous model New model
Cooling 0°C -5°C
Heating -10°C -15°C

- (01 - 06) -
DUCT TYPE ARC72-90LHTA DUCT TYPE ARC72-90LHTA
WIRED REMOTE CONTROLLER2.
FEATURES

Various timer setup (ON / OFF / WEEKLY) are possible.

Equipped with weekly timer as standard function.(2 times Start / Stop

per day for a week)
When setting up a timer, operation mode and a temperature setup

can be changed.
When a failure occurs, the error code is displayed. (Maximum of 16)

Error indication.(A maximum of 16 error histories are memorizable.)

Up to 16 indoor units can be simultaneously controlled.

The room temperature can be controlled by being detected the

temperature accurately with built-in thermo sensor.
Simple function setting
z
Setting of the air conditioner selection function is performed by remote controller.
High performance and compact size
z
Three functions are combined in
one unit.
Built-in timers
z
Wired
remote
controller
Weekly
timer
Setback
timer
+ +
Weekly timer Setback timer
At "Weekly timer" + "Set back timer" setup
Easy-to-understand operation
z
[Variable timer control]
The operation/display sections are zoned
according to time and operation, enabling
variable programming to match application.
Simple installation
z
Components are compatible with standard
switch boxes. Flat back construction allows
equipment to be installed wherever it is
needed.
SU MO TU WE TH FR SA
7
3 12 6 9 15 18 21
SU MO TU WE TH FR SA
7
3 12 6 9 15 18 21
SU MO TU WE TH FR SA
3 12 6 9 15 18 21
Possible to set ON/OFF time to operate twice each day
of the week.
Setup screen example
(Set to Wednesday: 8:00 to 20:00.)
Screen
after setup
European
switch box
JIS box
Setup screen example
(Set from Sunday to Saturday: 12:00 to 15:00, 28 °C.)
Possible to set temperature for two time spans and
for each day of the week.
Easy-to-understand time bar display
24°C
036912 15 18 21 Time
28°C
036912 15 18 21 Time
28°C
24°C
036912 15 18 21 Time
24°C 28°C 24°C
Timer
area
Operation
area

- (01 - 07) -
DUCT TYPE ARC72-90LHTA DUCT TYPE ARC72-90LHTA
FUNCTIONS

Display panel
DIMENSION

SPECIFICATION

WIRING SPECIFICATIONS

Use Size Wire type Remarks
Remote controller
cable
0.33mm2
( 22AWG ) Polar 3 core Use sheathed PVC cable.
15
11
10
9
8
21
3
5
14
4
12
13
6
7
17
16 18
19 20
21
120
120
120
18
Side ViewFront View
SIZE (H x W x D mm) 120 x 120 x 18
WEIGHT ( g ) 160
CABLE LENGTH ( m ) 10
POWER ( V ) 12
1 START/STOP button
Pressed to start and stop operation.
2 SET TEMP. button
Selects the setting temperature.
3 MODE button
Selects the operating mode (AUTO, HEAT, FAN, COOL, DRY).
4 FAN button
Selects the fan speed (AUTO, LOW, MED, HIGH).
5 ECONOMY button
Turns the economy efcient mode on and off.
6 TIMER MODE (CLOCK ADJUST) button
Selects the timer mode (OFF TIMER, ON TIMER, WEEKLY
TIMER). Set the current time.
7 DAY (DAY OFF) button
Temporarily cancels of one day timer.
8 SET BACK button
Pressed to select the set back timer.
9 Set time button
Pressed to set time.
10 TIMER DELETE button
The schedule of a weekly timer is deleted.
11 TIMER SET button
Sets the date, hour, minute and on-off time.
12 Vertical airow direction and swing button
Push for two seconds to change the swing mode.
13 Horizontal airow direction and swing button
Push for two seconds to change the swing mode.
14 FILTER RESET button
15 Operation lamp
Lights during operation and when the timer is on.
16 Timer and clock display
17 Operation mode display
18 Fan speed display
19 Operation lock display
20 Temperature display
21 Function display
Defrost display
Thermo sensor display
Economy display
Vertical swing display
Horizontal swing display
Filter display
Functions will be different due to type of indoor unit.
For details, please see operation manual.
[ Unit : mm ]