Fujitsu ARA12LATN Service Instruction page 116

2. BENDING PIPES (3) When the fl are nut is tightened properly by your hand, use a
torque wrench to fi nally tighten it.
The pipes are shaped by your hands. Be careful not to collapse
them.
Holding spanner
Body side
Extend the pipe
Good Bad
by unwinding it
Do not bend the pipes in an angle more than 90°.
When pipes are repeatedly bent or stretched, the material will
harden, making it diffi cult to bend or stretch them any more. Do
not bend or stretch the pipes more than three times.
CAUTION
When bending the pipe, do not
Pipe
Hold the torque wrench at its grip, keeping it in the
bend it as is. The pipe will be
Heat insulating
right angle with the pipe, in order to tighten the fl are
collapsed. In this case, cut the
Pipe
nut correctly.
heat insulating pipe with a sharp
Cutter
cutter as shown on the right, and
bend it after exposing the pipe.
Flare nut
After bending the pipe as you
Cut line
6.35 mm (1/4 in.) dia. 14 to 18 N·m (140 to 180 kgf·cm)
want, be sure to put the heat
insulating pipe back on the pipe, 9.52 mm (3/4 in.) dia. 33 to 42 N·m (330 to 420 kgf·cm)
and secure it with tape.
12.70 mm (1/2 in.) dia. 50 to 62 N·m (500 to 620 kgf·cm)
CAUTION
CAUTION
1 To prevent breaking of the pipe, avoid sharp
Be sure to connect the large pipe after connecting
bends.
the small pipe completely.
Bend the pipe with a radius of curvature of
150 mm or over.
• Lay the piping.
2 If the pipe is bent repeatedly at the same place,
A. CEILING CONCEALED TYPE
it will break.
Control box cover
3. CONNECTION PIPES
Indoor unit
(1) Detach the caps and plugs from the pipes.
CAUTION
Pipe
1 Be sure to apply the pipe against the port on
Good
the indoor unit correctly. If the centering is
improper, the fl are nut cannot be tightened
B. FLOOR STANDING CONCEALED TYPE
smoothly. If the fl are nut is forced to turn, the
threads will be damaged.
2 Do not remove the fl are nut from the indoor unit
pipe until immediately before connecting the
connection pipe.
(2) Centering the pipe against port on the indoor unit, turn the
fl are nut with your hand.
Good Good
CAUTION
To prevent gas leakage, coat the flare
surface with alkylbenzene oil (HAB).
1 Install the piping so that the control box cover
Do not use mineral oil.
can be removed for servicing.
2 In order to prevent water from leaking into the
control box, make sure that the piping is well
insulated.
6
[Troubleshooting at the remote control LCD]
TEST RUN
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-
("EE" will appear in the set room temperature display.)
mal?
(2) Does each lamp light normally?
Unit number
(3) Do not air fl ow direction louvers operate normally?
(4) Is the drain normal?
(5) Is there any abnormal noise and vibration during operation?
SU MO TU WE TH FR SA
• Do not operate the air conditioner in the running state for a
long time.
EX. Self-diagnosis
[Using the wireless remote control]
Error code Error contents
• For the operation method, refer to the operating manual.
01
• The outdoor unit may not operate, depending on the room
temperature. In this case, press the test run button on the 13
Indoor signal error
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 Wired remote controller abnormal
ball-point pen, etc.)
02
Indoor room temperature sensor error
Indoor heat exchanger temperature sensor
04
Transmitter section
(middle) error
Indoor heat exchanger temperature sensor
28
(inlet) error
09 Float switch operated
Outdoor discharge pipe temperature sensor
0C
error
Outdoor heat exchanger temperature sensor
Test run button 06
(outlet) error
0A
Outdoor temperature sensor error
• To end test operation, press the remote control unit START/
15 Compressor temperature sensor error
STOP button.
1d 2-way valve temperature sensor error
(When the air conditioner is run by pressing the test run button,
the OPERATION indicator lamp and TIMER indicator lamp will 1E
3-way valve temperature sensor error
simultaneously fl ash slowly.)
Outdoor heat exchanger temperature sensor
29
(middle) error
[Using the wired remote control]
20 Indoor manual auto switch abnormal
• For the operation method, refer to the operating manual.
2A
Power supply frequency detection error
17 IPM protection
(1) Stop the air conditioner operation.
18 CT error
(2) Press the master control button and the fan control button
1A
simultaneously for 2 seconds or more to start the test run. Compressor location error
1b Outdoor fan error
1F
Connected indoor unit abnormal
FAN MODE
1c Outdoor unit computer communication error
12 Indoor fan abnormal
0F
Discharge temperature error
Test run display
24 Exessive high pressure protection on cooling
2c 4-way valve abnormal
(3) Press the start/stop button to stop the test run.
16 Pressure switch abnormal
2b Compressor temperature error
19
Active fi lter abnormal
25 PFC circuit error
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.
9374815043_B2.indd 2 9374815043_B2.indd 2
3 4
INSTALLING THE
COUPLER HEAT
INSULATION
HOW TO CONNECT WIRING TO THE
TERMINALS
After checking for gas leaks, insulate by wrapping insulation
around the two parts (gas and liquid) of the indoor unit coupling,
A. For solid core wiring
using the coupler heat insulation.
After installing the coupler heat insulation, wrap both ends with (1) Cut the wire end with a wire cutter or wire-cutting pliers,
Torque wrench
vinyl tape so that there is no gap.
(2) Using a screwdriver, remove the terminal screw(s) on the
Coupler heat insulation
Body (3) Using pliers, bend the solid wire to form a loop suitable for
No gap
(4) Shape the loop wire properly, place it on the terminal
Be sure to overlap the Coupler heat
insulation insulation
CAUTION B. For strand wiring
Tightening torque Must fi t tightly against body without any gap. (1) Cut the wire end with a wire cutter or wire-cutting pliers,
(2) Using a screwdriver, remove the terminal screw(s) on the
(3) Using a round terminal fastener or pliers, securely clamp
(4) Position the round terminal wire, and replace and tighten
Bad
Bad
7 8
STATIC PRESSURE
CHARACTERISTIC
CAUTION
If the applicable static pressure does not match the 1 When setting DIP switches, do not touch any
static pressure mode, the static pressure mode may
be changed to another mode automatically.
Error code
2 Be sure to turn off the main power.
RECOMMENDED RANGE OF
EXTERNAL STATIC PRESSURE
GROUP CONTROL SYSTEM
0Pa to 90Pa
A number of indoor units can be operated at the same time using
a single remote controller.
1. STATIC PRESSURE MODE (1) Wiring method (indoor unit to remote controller)
It is necessary to set up a static pressure mode for each usage
Indoor unit
of static pressure. No.
Determine the applicable range of static pressure in each mode
and wind volume, referring to the TECHNICAL MANUAL.
2. MODE SETTING
It is possible to change the setting of static pressure mode. Refer
to [5] FUNCTION SETTING and to the INSTALLATION INSTRUC-
Remote controller wire
TION SHEET of remote controller for a setting method.
(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
Example : No. 3
1. CONNECTION DIAGRAMS
ELECTRICAL WIRING
Remote controller
Red
3
White
2
Black
1
Power line
Red
3 -
White
2
then strip the insulation to about 25 mm (15/16") of expose
Black 1
the solid wire.
Control line
terminal board.
Indoor unit
side terminal
the terminal screw.
board and tighten securely with the terminal screw using
2. CONNECTION CORD PREPARATION
a screwdriver.
Keep the earth wire longer than the other wires.
then strip the insulation to about 10 mm (3/8") of expose
the strand wiring.
terminal board.
Earth wire
a round terminal to each stripped wire end.
the terminal screw using a screwdriver.
A. Solid wire B. Strand wire
3. CONNECTION OF WIRING
Round
terminal
WARNING
Loop
1 Before starting work, check that power is not
being supplied to the indoor unit and outdoor
unit.
Insulation
Screw with
2 Match the terminal board numbers and con-
special washer
Screw with nection cord colors with those of the outdoor
special washer
Round terminal
unit.
Terminal Erroneous wiring may cause burning of the
Round
Wire
board
terminal
electric parts.
Wire
3 Connect the connection cords firmly to the
terminal board. Imperfect installation may cause
a fi re.
4 Always fasten the outside covering of the con-
nection cord with the cord clamp. (If the insula-
tor is chafed, electric leakage may occur.)
5 Always connect the ground wire.
6 Install the remote controller wires so as not to
be direct touched with your hand.
9
SPECIAL INSTALLATION CUSTOMER GUIDANCE
METHODS
Explain the following to the customer in accordance with the
CAUTION
operating manual:
(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
louvers.
(3) Give the operating and installation manuals to the customer.
(4) If the signal code is changed, explain to the customer how it
change (the system returns to signal code A when the batteries
in the remote control unit are replaced).
*(4) is applicable to using wireless remote control.
Indoor unit Indoor unit Indoor unit
0 No. 1 No. 2 No. 3
1 2 3 1 2 3 1 2 3 1 2 3
1 2 3
Remote
controller
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
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
ON
1 2 3 4
PART NO. 9374815043
(1) Remove the control box cover and install each connection 5
FUNCTION SETTING
wire.
Control box
Screw
• Follow the instructions in the Local Setup Procedure, which is
supplied with the remote control, in accordance with the installed
condition. After the power is turned on, perform the Function
Control box cover
Setting on the remote control.
Remove the 4 screws and
• The settings may be selected between the following two: Func-
remove the control box cover
Outdoor unit
from the control box. tion Number or Setting Value.
• Settings will not be changed if invalid numbers or setting values
are selected.
(2) After wiring is complete, secure the remote controller cord,
connection cord, and power cord with the cord clamps.
Setting the Static Pressure
1 2 3 1 2 3
Setting Description
Normal
High static pressure 1
High static pressure 2
TO REMOTE UNIT High static pressure 3
Determine the wind volume in each mode i.e., applicable
Power supply cord
Nylon clamp range of static pressure, refering to [7] STATIC PRESSURE
or connection cord
CHARACTERISTICS. (The unit is factory-set to "00".)
Cord clamp
Remote control cord
Setting the Cooler Room Temperature Correction
Connection cord
• Depending on the installed environment, the room temperature
sensor may require a correction. The settings may be selected
as shown in the table below. (The unit is factory-set to "00".)
CAUTION
Setting Description
1 Tighten the indoor unit connection cord (to the
Standard
outdoor unit) and power supply indoor and
outdoor unit terminal board connections fi rmly
Lower control
with the terminal board screws. Faulty connec-
tion may cause a fi re.
Setting the Heater Room Temperature Correction
2 If the indoor unit connection cord (to the outdoor
• Depending on the installed environment, the room temperature
unit) and power supply are wired incorrectly, the
sensor may require a correction. The settings may be changed
air conditioner may be damaged.
as shown in the table below. (The unit is factory-set to "00".)
3 Wire the indoor unit connection cord (to the
outdoor unit) by matching the numbers of
Setting Description
the outdoor and indoor units terminal board
numbers as shown in terminal label.
Standard
4 Ground both the indoor and outdoor units by
Lower control
attaching a ground wire.
Slightly warmer control
5 Unit shall be grounded in compliance with the
Warmer control
applicable local and national codes.
Setting Other Functions
• The following settings are also possible, depending on the
operating conditions. (The unit is factory-set to "00".)
Auto Restart
Setting Description Function Number Setting Value
Yes 00
40
No 01
Indoor Room Temperature Sensor Switching Function (Wired
remote controller only)
Setting Description Function Number Setting Value
No 00
Function Number Setting Value
42
Yes 01
00
01 • If setting value is "00", room temperature is controlled by the
21
indoor unit temperature sensor.
02
• If setting value is "01", room temperature is controlled by either
03 indoor unit temperature sensor or remote control unit sensor.
[When using the wireless remote controller]
SWITCHING REMOTE CONTROL UNIT
SIGNAL CODES
• Confi rm the setting of the remote control unit signal code and
the printed circuit board setting.
If these are not confi rmed, the remote control unit cannot be
used to operate for the air conditioner.
Function Number Setting Value
Jumper wire
Remote control unit
signal code
00 JM1 JM2
30
Connect Connect A (Primary setting)
01
Disconnect Connect b
Connect Disconnect c
Disconnect Disconnect d
Setting Record
• Record any changes to the settings in the following table.
Function Number Setting Value
Setting Setting Value
00
01 Static pressure
31
02
Cooler room temperature
correction
03
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.
1/11/07 2:17:00 PM 1/11/07 2:17:00 PM