Fujitsu ARA12LATN Service Instruction page 120

2 CONNECTING THE 2. BENDING PIPES
The pipes are shaped by your hands. Be careful not to collapse
PIPE
them.
CAUTION
1 Do not use mineral oil on fl ared part. Prevent
mineral oil from getting into the system as this
would reduce the lifetime of the units. Extend the pipe
by unwinding it
2 While welding the pipes, be sure to blow dry
Do not bend the pipes in an angle more than 90°.
nitrogen gas through them.
When pipes are repeatedly bent or stretched , the material will
harden, making it diffi cult to bend or stretch them any more. Do
1. FLARING
not bend or stretch the pipes more than three times.
(1) Cut the connection pipe to the necessary length with a pipe
cutter. When bending the pipe, do not
(2) Hold the pipe downward so that cuttings will not enter the pipe bend it as is. The pipe will be
collapsed. In this case, cut the
and remove the burrs.
Heat insulating
heat insulating pipe with a sharp
(3) Insert the fl are nut (always use the fl are nut attached to the
Pipe
cutter as shown on the right, and
indoor and outdoor units respectively) onto the pipe and
bend it after exposing the pipe.
perform the fl are processing with a fl are tool.
After bending the pipe as you
Use the special R410A fl are tool, or the conventional fl are
want, be sure to put the heat
tool.
insulating pipe back on the pipe,
and secure it with tape.
Check if [L] is flared uniformly
and is not cracked or scratched
CAUTION
B
1 To prevent breaking of the pipe, avoid sharp
bends.
Die
Bend the pipe with a radius of curvature of 150
A
L
mm or over.
Pipe
2 If the pipe is bent repeatedly at the same place,
it will break.
Dimension A (mm)
Pipe outside diameter
Flare tool for R410A, clutch type
3. CONNECTION PIPES
6.35 mm (1/4 in.)
Indoor unit
9.52 mm (3/8 in.)
0 to 0.5
(1) Detach the caps and plugs from the pipes.
12.70 mm (1/2 in.)
15.88 mm (5/8 in.) CAUTION
1 Be sure to apply the pipe against the port on the
0
Pipe outside diameter Dimension B (mm) indoor unit correctly. If the centering is improper,
-0.4
the fl are nut cannot be tightened smoothly. If
6.35 mm (1/4 in.) 9.1
the fl are nut is forced to turn, the threads will
9.52 mm (3/8 in.) 13.2
be damaged.
12.70 mm (1/2 in.) 16.6 2 Do not remove the fl are nut from the indoor unit
15.88 mm (5/8 in.) 24.0 pipe until immediately before connecting the
connection pipe.
When using conventional fl are tools to fl are R410A pipes, the
dimension A should be approximately 0.5 mm more than
(2) Centering the pipe against port on the indoor unit, turn the
indicated in the table (for fl aring with R410A fl are tools) to achieve
fl are nut with your hand.
the specifi ed fl aring. Use a thickness gauge to measure the
dimension A.
Width across flats
Pipe outside Width across fl ats
To prevent gas leakage, coat the flare
diameter of Flare nut
surface with alkylbenzene oil (HAB).
Do not use mineral oil.
6.35 mm (1/4 in.) 17 mm
9.52 mm (3/8 in.) 22 mm
12.70 mm (1/2 in.) 26 mm
15.88 mm (5/8 in.) 29 mm
5
FUNCTION SETTING Setting Other Functions
• The following settings are also possible, depending on the
operating conditions. (The unit is factory-set to "00".)
Auto Restart
• Follow the instructions in the Local Setup Procedure, which is
supplied with the remote control, in accordance with the installed
Setting Description Function Number
condition. After the power is turned on, perform the Function
Setting on the remote control.
Yes
40
• The settings may be selected between the following two: Func-
No
tion Number or Setting Value.
• Settings will not be changed if invalid numbers or setting values Indoor Room Temperature Sensor Switching Function (Wired
are selected. remote controller only)
Setting the Static Pressure
Setting Description Function Number
No
Setting Description Function Number Setting Value
42
Yes
Normal 00
High static pressure 1 01 • If setting value is "00", room temperature is controlled by the
21
indoor unit temperature sensor.
High static pressure 2 02
• If setting value is "01", room temperature is controlled by either
High static pressure 3 03
indoor unit temperature sensor or remote control unit sensor.
Determine the wind volume in each mode i.e., applicable
[When using the wireless remote controller]
range of static pressure, refering to [7] STATIC PRESSURE
CHARACTERISTICS. (The unit is factory-set to "00")
SWITCHING REMOTE CONTROL UNIT
SIGNAL CODES
Setting the Cooler Room Temperature Correction
• Depending on the installed environment, the room temperature
• Confi rm the setting of the remote control unit signal code and
sensor may require a correction. The settings may be selected
the printed circuit board setting.
as shown in the table below. (The unit is factory-set to "00".)
If these are not confi rmed, the remote control unit cannot be
used to operate for the air conditioner.
Setting Description Function Number Setting Value
Jumper wire
Standard 00 JM1 JM2
30
Lower control 01
Connect Connect
Disconnect Connect
Setting the Heater Room Temperature Correction
Connect Disconnect
• Depending on the installed environment, the room temperature
sensor may require a correction. The settings may be changed Disconnect Disconnect
as shown in the table below. (The unit is factory-set to "00".)
Setting Record
• Record any changes to the settings in the following table.
Setting Description Function Number Setting Value
Standard 00
Setting
Lower control 01
31 Static pressure
Slightly warmer control 02
Cooler room temperature
Warmer control 03
correction
Heater room temperature
correction
Auto restart
Indoor room temperature sensor
switching function
After completing the FUNCTION SETTING, be sure to turn off
the power and turn it on again.
9374318148_B2back.indd 1 9374318148_B2back.indd 1
3
CAUTION
Hold the torque wrench at its grip, keeping it in the
right angle with the pipe , in order to tighten the
fl are nut correctly.
When the fl are nut is tightened properly by your hand, use a torque
After checking for gas leaks, insulate by wrapping insulation
wrench to fi nally tighten it.
around the two parts (gas and liquid) of the indoor unit coupling,
Torque wrench using the coupler heat insulation.
Holding
After installing the coupler heat insulation, wrap both ends with
spanner
vinyl tape so that there is no gap.
Unit
side
Body
Pipe
Flare nut tightening torque
Cutter
Flare nut Tightening torque
Must fi t tightly against body without any gap.
Cut line
6.35 mm (1/4 in.) dia. 14 to 18 N·m (140 to 180 kgf·cm)
15.88 mm (5/8 in.) dia. 63 to 77 N·m (630 to 770 kgf·cm)
CAUTION
Be sure to connect the gas pipe after connecting
the liquid pipe completely.
6
TEST RUN [Troubleshooting at the remote control LCD]
This is possible only on the wired remote control.
[SELF-DIAGNOSIS]
CHECK ITEMS
If an error occurs, the following display will be shown.
(1) Is operation of each button on the remote control unit nor-
Setting Value ("EE" will appear in the set room temperature display.)
mal?
(2) Does each lamp light normally?
00
(3) Do not air fl ow direction louvers operate normally?
01
(4) Is the drain normal?
(5) Is there any abnormal noise and vibration during operation?
• Do not operate the air conditioner in the running state for a
long time.
Setting Value
[Using the wireless remote control]
00 • For the operation method, refer to the operating manual. Error code
• The outdoor unit may not operate depending on the room 01
01
temperature. In this case, press the test run button on the
13
remote control unit while the air conditioner is running. (Point
26
the transmitter section of the remote control unit toward the
27
air conditioner and press the test run button with the tip of a
00
ball-point pen, etc.)
02
04
Transmitter section
28
09
0C
Test run button 06
0A
• To end test operation, press the remote control unit START/
15
STOP button.
Remote control unit
(When the air conditioner is run by pressing the test run button, 1d
signal code
the OPERATION indicator lamp and TIMER indicator lamp will 1E
A (Primary setting) simultaneously fl ash slowly.)
29
b
[Using the wired remote control]
20
c
• For the operation method, refer to the operating manual.
2A
d
17
(1) Stop the air conditioner operation.
(2) Press the master control button and the fan control button 18
simultaneously for 2 seconds or more to start the test run. 1A
1b
1F
Setting Value
FAN MODE
1c
12
0F
Test run display
24
2c
(3) Press the start/stop button to stop the test run.
16
2b
19
25
If "CO" appears in the unit number display, there is a remote
controller error. Refer to the installation instruction sheet included
with the remote controller.
INSTALLING THE 4
ELECTRICAL WIRING
COUPLER HEAT
INSULATION
CAUTION
Do not bundle the remote controller cord, or wire
the remote controller cord in parallel, with the
indoor unit connection wire (to the outdoor unit)
and the power supply cord. It may cause errone-
ous operation.
Coupler heat insulation HOW TO CONNECT WIRING TO THE
TERMINALS
No gap
A. For solid core wiring
Be sure to overlap the Coupler heat
(1) Cut the wire end with a wire cutter or wire-cutting pliers,
insulation insulation
then strip the insulation to about 25 mm (15/16") to expose
the solid wire.
CAUTION
(2) Using a screwdriver, remove the terminal screw(s) on the
terminal board.
(3) Using pliers, bend the solid wire to form a loop suitable for
the terminal screw.
(4) Shape the loop wire properly, place it on the terminal
board and tighten securely with the terminal screw using
a screwdriver.
B. For strand wiring
(1) Cut the wire end with a wire cutter or wire-cutting pliers,
then strip the insulation to about 10 mm (3/8") to expose
the strand wiring.
(2) Using a screwdriver, remove the terminal screw(s) on the
terminal board.
(3) Using a round terminal fastener or pliers, securely clamp
a round terminal to each stripped wire end.
(4) Position the round terminal wire, and replace and tighten
the terminal screw using a screwdriver.
A. Solid wire B. Strand wire
Loop
Insulation
Screw with
special washer
Screw with
Round terminal special washer
Wire
Terminal Round
board terminal
Wire
Terminal block
7
STATIC PRESSURE
CHARACTERISTIC
CAUTION
If the applicable static pressure does not match the
Unit number
static pressure mode, the static pressure mode may
Error code
be changed to another mode automatically.
SU MO TU WE TH FR SA
RECOMMENDED RANGE OF
EXTERNAL STATIC PRESSURE
30Pa to 150Pa
EX. Self-diagnosis
Error contents
1. FAN PERFORMANCE AND AIR FLOW
EXTERNAL STATIC PRESSURE
Indoor signal error
160
Wired remote controller abnormal Mode 4 High
Indoor room temperature sensor error
140
Indoor heat exchanger temperature sensor
(middle) error
120
Indoor heat exchanger temperature sensor
(inlet) error
Mode 3 High
Float switch operated 100
Outdoor discharge pipe temperature sensor
error
80
Outdoor heat exchanger temperature sensor
Mode 2 High
(outlet) error
60
Outdoor temperature sensor error
Compressor temperature sensor error
Mode 1 High
40
2-way valve temperature sensor error
3-way valve temperature sensor error
20
Outdoor heat exchanger temperature sensor
(middle) error
Indoor manual auto switch abnormal
0
500 600 700 800 900 1000 1100 1200
Power supply frequency detection error
IPM protection AIR FLOW (m 3 /h)
CT error
2. AIR FLOW SETTING
Compressor location error
The air fl ow is set according to the DIP switch settings in the
Outdoor fan error
following tables.
Connected indoor unit abnormal
Outdoor unit computer communication error
Mode Setting condition Static pressure range
Indoor fan abnormal
1
Normal 30 g P g 40
Discharge temperature error
2 High static pressure 1 56 g P g 65
Exessive high pressure protection on cooling
4-way valve abnormal 3
High static pressure 2 95 g P g 105
Pressure switch abnormal
4 High static pressure 3 142 g P g 150
Compressor temperature error
Active fi lter abnormal
PFC circuit error
1. CONNECTION DIAGRAMS (1) Remove the control box cover and install each connection
wire.
Remote controller
Red
3
White
2
Black
1
Power line
3
Red
2
White Outdoor unit
Black 1
Control line
Indoor unit
side terminal
2. CONNECTION CORD PREPARATION
Keep the earth wire longer than the other wires.
(2) After wiring is complete, secure the remote controller cord,
connection cord, and power cord with the cord clamps.
Power supply cord
Earth wire
or connection cord
3. CONNECTION OF WIRING
WARNING
1 Before starting work, check that power is not
being supplied to the indoor unit and outdoor
unit.
2 Match the terminal board numbers and con-
nection cord colors with those of the outdoor Connection cord
(to outdoor unit)
Round unit.
terminal
Erroneous wiring may cause burning of the
electric parts.
3 Connect the connection cords firmly to the
45 mm
terminal board. Imperfect installation may
cause a fi re.
4 Always fasten the outside covering of the
connection cord with the cord clamp. (If the
insulator is chafed, electric leakage may occur.) Cord clamp
5 Always connect the ground wire.
6 Install the remote controller wires so as not to
be direct touched with your hand.
8 9
SPECIAL INSTALLATION CUSTOMER GUIDANCE
METHODS
Explain the following to the customer in accordance with the
CAUTION
operating manual:
1 When setting DIP switches, do not touch any
(1) Starting and stopping method, operation switching, tempera-
other parts on the circuit board directly with
ture adjustment, timer, air fl ow switching, and other remote
your bare hands.
control unit operations.
(2) Air filter removal and cleaning, and how to use the air
2 Be sure to turn off the main power.
louvers.
(3) Give the operating and installation manuals to the customer.
(4) If the signal code is changed, explain to the customer how it
GROUP CONTROL SYSTEM
changed (the system returns to signal code A when the bat-
A number of indoor units can be operated at the same time using teries in the remote control unit are replaced).
a single remote controller.
*(4) is applicable to using wireless remote control.
(1) Wiring method (indoor unit to remote controller)
Indoor unit Indoor unit Indoor unit Indoor unit
No. 0 No. 1 No. 2 No. 3
1 2 3 1 2 3 1 2 3 1 2 3
1 2 3
Remote
controller
Remote controller wire
(2) DIP switch setting (Indoor unit)
Set the unit number of each indoor unit using DIP switch on the
indoor unit circuit board. (See following table and fi gure.)
DIP switch is normally set to make unit number No. 0.
Indoor unit
Unit number DIP SWITCH No.
1 2 3 4
0 OFF OFF OFF OFF
1 ON OFF OFF OFF
2 OFF ON OFF OFF
3 ON ON OFF OFF
1300
4 OFF OFF ON OFF
5 ON OFF ON OFF
6 OFF ON ON OFF
7 ON ON ON OFF
8 OFF OFF OFF ON
9 ON OFF OFF ON
10 OFF ON OFF ON
11 ON ON OFF ON
12 OFF OFF ON ON
13 ON OFF ON ON
14 OFF ON ON ON
15 ON ON ON ON
Example : No. 3
ON
1 2 3 4
CAUTION
1 Tighten the indoor unit connection cord (to the
outdoor unit) and power supply indoor and
outdoor unit terminal board connections fi rmly
with the terminal board screws. Faulty connec-
tion may cause a fi re.
2 If the indoor unit connection cord (to the outdoor
unit) and power supply are wired incorrectly, the
air conditioner may be damaged.
3 Wire the indoor unit connection cord (to the
outdoor unit) by matching the numbers of
the outdoor and indoor units terminal board
Control box cover
Screw numbers as shown in terminal label.
4 Ground both the indoor and outdoor units by
attaching a ground wire.
5 Unit shall be grounded in compliance with the
applicable local and national codes.
(3) Install control box cover.
Remote
Cord clamp
controller cord
Adjust the position of the screws for control box cover according
to the installation.
PART NO. 9374318148
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