Fujitsu AU*A12LALN Service Instruction page 130

5
ELECTRICAL WIRING
Keep the earth wire longer than the other wires.
HOW TO CONNECT WIRING TO THE
TERMINALS
Earth wire
A. For solid core wiring
(1) Cut the wire end with a wire cutter or wire-cutting pliers, then strip
the insulation to about 25 mm of expose the solid wire.
(2) Using a screwdriver, remove the terminal screw(s) on the terminal
• Use a 4-core wire cord.
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
2. CONNECTION OF WIRING
tighten securely with the terminal screw using a screwdriver.
WARNING
B. For strand wiring
1 Before starting work, check that power is not being
(1) Cut the wire end with a wire cutter or wire-cutting pliers, then strip
supplied to the indoor unit and outdoor unit.
the insulation to about 10 mm of expose the strand wiring.
(2) Using a screwdriver, remove the terminal screw(s) on the terminal
2 Match the terminal board numbers and connection
board.
cord colors with those of the outdoor unit.
(3) Using a round terminal fastener or pliers, securely clamp a round
Erroneous wiring may cause burning of the electric
terminal to each stripped wire end.
parts.
(4) Position the round terminal wire, and replace and tighten the
terminal screw using a screwdriver.
3 Connect the connection cords firmly to the terminal
Round board. Imperfect installation may cause a fire.
A. Solid wire B. Strand wire
terminal
4 Always fasten the outside covering of the connection
Loop
cord with the cord clamp. (If the insulator is chafed,
electric leakage may occur.)
5 Always connect the ground wire.
Insulation
6 Install the remote controller wires so as not to be di-
Screw with
rect touched with your hand.
special washer
Screw with
Round terminal special washer (1) Remove the control box cover and terminal box cover and install each
connection wire.
Terminal
Wire Round
board terminal
Wire
1. CONNECTION DIAGRAMS
Connection cord (to outdoor unit)
Control line
Terminal box cover
3
2 Control box cover
1
Power line (2) After wiring is complete, clamp the remote controller cord with the
nylon clamp, and clamp the connection cord with the cord clamp.
Indoor unit
side
Wired remote controller cord (option)
*
Red
3
White
2
Black
1
Indoor unit Connection cord (to outdoor unit)
side
Wired remote controller cord (option)
* Ground the remote controller ip it has a ground wire
8
TEST RUN TROUBLESHOOTING
[Troubleshooting with the indoor display]
CHECK ITEMS
Troubleshooting at the display is possible either on the wired or wireless
(1) Is operation of each button on the remote control unit normal? remote control.
(2) Does each lamp light normally?
(3) Do not air flow direction louvers operate normally? FILTER lamp TIMER lamp OPERATION lamp
(4) Is the drain normal? (ORANGE) (GREEN) (RED)
(5) Is there any abnormal noise and vibration during operation?
• Do not operate the air conditioner in the running state for a long time.
CHECKING DRAINAGE
To check the drain, remove the water cover and fill with 2 to 3rof water as
shown in the figure. The OPERATION, TIMER and FILTER lamp operate as follows table ac-
The drain pump operates when operating in the cooling mode. cording to the error contents.
OPERATION
Error contents
lamp (RED)
Indoor signal error
Drain pipe
Wired remote controller abnormal
Indoor room temperature sensor error (2 times)
Water cover
Indoor heat exchanger temperature
(2 times)
sensor (middle) error
Indoor heat exchanger temperature
(2 times)
sensor (inlet) error
Float switch operated (2 times)
Outdoor discharge pipe temperature
Watering pot
(3 times)
sensor error
• Test running Outdoor heat exchanger temperature
(3 times)
sensor (outlet) error
When the air conditioner is run by pressing the remote control unit test
Outdoor temperature sensor error (3 times)
run button, the OPERATION and TIMER lamps flash slowly at the same
time. Heatsink sensor error
(3 times)
Compressor temperature sensor error (3 times)
[Using the wireless remote control]
2-way valve temperature sensor error (3 times)
• For the operation method, refer to the operating manual.
3-way valve temperature sensor error (3 times)
• The outdoor unit may not operate depending on the room temperature.
Outdoor heat exchanger temperature
In this case, press the test run button on the remote control unit while (3 times)
sensor (middle) error
the air conditioner is running. (Point the transmitter section of the re-
Indoor manual auto switch abnormal (4 times)
mote control unit toward the air conditioner and press the test run but-
ton with the tip of a ball-point pen, etc.) Power supply frequency detection
(4 times)
error
Transmitter section
IPM protection (5 times)
CT error
(5 times)
Compressor location error (5 times)
Outdoor fan error (5 times)
Connected indoor unit abnormal (5 times)
Outdoor unit computer communication
(5 times)
error
Indoor fan abnormal (6 times)
Test run button
Discharge temperature error (7 times)
• To end test operation, press the remote control unit START/STOP button. Excessive high pressure protection on
(7 times)
(When the air conditioner is run by pressing the test run button, the cooling
OPERATION indicator lamp and TIMER indicator lamp and TIMER in-
4-way valve abnormal
(7 times)
dicator lamp will simultaneously flash slowly.)
Pressure switch abnormal (7 times)
[Using the wired remote control] Compressor temperature error (7 times)
Active filter abnormal (8 times)
• For the operation method, refer to the operating manual.
PFC circuit error (8 times)
(1) Stop the air conditioner operation.
(2) Press the master control button and the fan control button simultane- : 0.5s ON/0.5s OFF (Flash) : OFF
ously for 2 seconds or more to start the test run.
Test run display
(3) Press the start/stop button to stop the test run.
6
BLOWER COVER INSULATION
Terminal Connection cord Install the blower cover insulation only when the outlet direction is not
Power supply cord (to outdoor unit)
specified.
Cord clamp
or connection cord
Two blower cover insulations are packed with the indoor unit.
Install the blower cover insulation at the diffuser position shown in figure.
At this time, use the piping position as the criteria.
Terminal
2 direction example
Nylon clamp
Wired remote controller cord
(option)
(3) Install control box cover and terminal box cover.
CAUTION
Do not bundle the remote controller cord, or wire the re-
mote controller cord in parallel, with the indoor unit con-
nection wire (to the outdoor unit) and the power supply (Piping direction)
cord. It may cause erroneous operation.
(4) Attach the rubber sheets at the two places indicated in the figure be-
INSTALLING THE INTAKE GRILLE
low.
(1) Mount the grille hinge wire to the hook shaft as shown in figure.
Rubber sheets
(2 places)
Rubber sheet Rubber sheet
• Latch the grille hinge wire to the hook shaft, and fasten.
Part A detail view
Reference line Reference line
CAUTION
Be sure that the rubber sheets are correctly attached so
that the wires are covered.
9
[Troubleshooting at the remote control LCD]
This is possible only on the wired remote control.
[SELF-DIAGNOSIS]
If an error occurs, the following display will be shown.
1 When setting DIP switches, do not touch any other parts
("EE" will appear in the set room temperature display.)
on the circuit board directly with your bare hands.
Unit number
2 Be sure to turn off the main power.
Error code
1. GROUP CONTROL SYSTEM
SU MO TU WE TH FR SA
A number of indoor units can be operated at the same time using a
single remote controller.
(1) Wiring method (indoor unit to remote controller)
Indoor unit
Ex. Self-diagnosis
No. 0
TIMER lamp FILTER lamp
Error code Error contents
(GREEN) (ORANGE)
01
13
(8 times)
Indoor signal error
26
(2 times)
27
(3 times)
00 Wired remote controller abnormal
Remote controller wire
02
Indoor room temperature sensor error
(4 times)
Indoor heat exchanger temperature sensor (middle)
04 (2) DIP switch setting (indoor unit)
(6 times)
error
Set the unit number of each indoor unit using DIP switch on the indoor
Indoor heat exchanger temperature sensor (inlet) unit circuit board. (see following table and figure.)
(2 times)
28
error DIP switch is normally set to make unit number No. 0.
09 Float switch operated
(3 times)
0C Outdoor discharge pipe temperature sensor error
Indoor unit
(4 times)
Outdoor heat exchanger temperature sensor (outlet)
06
(7 times) error Unit number
(8 times) 0A Outdoor temperature sensor error
(2 times) 0E Heatsink sensor error
0
(3 times) 15
Compressor temperature sensor error 1
1d
2-way valve temperature sensor error 2
(4 times)
1E 3-way valve temperature sensor error 3
(2 times)
Outdoor heat exchanger temperature sensor (middle)
4
29
error
(4 times)
5
20 Indoor manual auto switch abnormal
6
(2 times)
2A Power supply frequency detection error
7
(3 times)
17 IPM protection
8
(5 times)
18 CT error
9
(6 times)
1A
Compressor location error
10
(7 times)
1b
Outdoor fan error
11
(8 times) 1F Connected indoor unit abnormal
12
1c Outdoor unit computer communication error
(2 or 3 times) 13
12 Indoor fan abnormal
(2 times) 14
0F Discharge temperature error
15
(3 times)
24 Excessive high pressure protection on cooling
2c 4-way valve abnormal
Example : No. 3
(4 times)
16
Pressure switch abnormal
(5 times)
2b
Compressor temperature error
(6 times)
19 Active filter abnormal
(2 or 3 times)
25 PFC circuit error
(4 times)
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.
GRILLE INSTALLATION (2) Install the hook wire.
• Pass the hook wire through the panel base from the rear side as
shown in figure, and fasten to the reinforced metal fitting of the
intake grille using a screw.
Hook wire
RFM (grille)
Panel
base
A A
Section view
Drain
Hook wire
pan
Blower cover
insulation
A-A Section view
Screw
(3) Loosen the screw, put the loop of the hook wire over it, and tighten
the screw again.
A
CAUTION
Install the intake grille hook wire to the grille assem-
bly. If it falls, it may cause injuries.
(4) Bring up the intake grille by pushing it up at an angle as shown in
figures, and fasten.
Part A section view
Hook shaft
Grille hinge
wire
10
SPECIAL INSTALLATION OPENING THE DUCT
METHODS CONNECTION HOLE
CAUTION
Distribution duct Fresh air
Distribution duct
Indoor unit Indoor unit Indoor unit
No. 1 No. 2 No. 3
1 2 3 1 2 3 1 2 3 1 2 3
CAUTION
1 When performing hole opening work, be careful not to
1 2 3
Remote
damage the drain pan.
controller
2 When connecting the distribution duct, to make the air
flow easily, block the outlet port with the blower cover
insulation as shown by the hatched lines in the figure.
For the blocking direction, refer to blower cover insu-
lation figure.
1. DIMENSION
Screw position and connection hole which are fresh air duct and distribu-
DIP SWITCH No.
tion duct.
1 2 3 4
P. D 120 P. D 88
OFF OFF OFF OFF
ON OFF OFF OFF
OFF ON OFF OFF
ON ON OFF OFF
OFF OFF ON OFF
ON OFF ON OFF
OFF ON ON OFF
160 mm 334.2 mm
ON ON ON OFF
12-ø3.3 self tapping screw holes (for 4 mm)
OFF OFF OFF ON
2. DISTRIBUTION DUCT AND FRESH AIR DUCT
ON OFF OFF ON
HOLE PROCESSING
OFF ON OFF ON
ON ON OFF ON
Use the distribution duct hole and fresh air duct hole by removing the
OFF OFF ON ON
insulation material as shown below.
ON OFF ON ON
OFF ON ON ON
ON ON ON ON
Cut
Cabinet
ON
Cut
1 2 3 4
7
FUNCTION SETTING Setting the Heater Room Temperature Correction
• Depending on the installed environment, the room temperature sensor
may require a correction. The settings may be changed as shown in the
• Follow the instructions in the Local Setup Procedure, which is supplied table below. (The unit is factory-set to "00".)
with the remote control, in accordance with the installed condition. After
Setting Description Function Number
the power is turned on, perform the Function Setting on the remote
Standard
control.
• The settings may be selected between the following two: Function
Lower control
Number or Setting Value. 31
• Settings will not be changed if invalid numbers or setting values are Slightly warmer control
selected. Warmer control
Setting the Ceiling Height
Setting Other Functions
• Select the setting values in the table below according to the height of
• The following settings are also possible, depending on the operating
the ceiling. (The unit is factory-set to "00".)
conditions. (The unit is factory-set to "00".)
Setting Description Function Number Setting Value
Auto Restart
Standard
00
(2.3 m to 3.0 m)
20 Setting Description Function Number
High ceiling
01
Yes
(3.0 m to 4.2 m)
40
No
The ceiling height values are for the 4-way outlet.
Do not change this setting in the 3-way or 2-way outlet mode.
Indoor Room Temperature Sensor Switching Function (Wired remote con-
troller only)
Setting the Outlet Directions
Setting Description Function Number
• Select the setting values in the table below for using a 3-way or 2-way
No
outlet. (The unit is factory-set to "00".)
42
Yes
Setting Description Function Number Setting Value
• If setting value is "00", room temperature is controlled by the indoor unit
4-way 00
temperature sensor.
• If setting value is "01", room temperature is controlled by either indoor
3-way 22
02
unit temperature sensor or remote control unit sensor.
2-way
[When using the wireless remote controller]
Setting the Filter Sign
SWITCHING REMOTE CONTROL UNIT SIGNAL
• The indoor unit has a sign to inform the user that it is time to clean the
CODES
filter.
• Select the time setting for the filter sign display interval in the table • Confirm the setting of the remote control unit signal code and the printed
below according to the amount of dust or debris in the room. (The unit circuit board setting.
is factory-set to "00") If these are not confirmed, the remote control unit cannot be used to
• If you do not wish the filter sign to be displayed, select the setting value
operate for the air conditioner.
for "No indication".
Jumper wire
Setting Description Function Number Setting Value
JM1 JM2
Standard
00
(2,500 hours) Connect Connect
Long interval Disconnect Connect
01
(4,400 hours) 11 Connect Disconnect
Short interval
Disconnect Disconnect
02
(1,250 hours)
No indication 03
Setting the Cooler Room Temperature Correction
• 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".)
Setting Description Function Number Setting Value
00
Standard
30
Lower control 01
• Cut off the part (Cabinet) indicated by the arrow in the figure with
nippers, needle nose pliers, etc.
Knife
Cabinet
Insulation
(Inner box)
• Open the holes and cut the insulation with a knife.
* Be careful not to damage the internal parts.
* Be careful not to cut yourself on the cutout in the metal plate.
* Please remove the insulation (inner box) left over after cutting.
• Connect the distribution duct.
* When mounting the duct, block the gap so that there is no cold air leakage.
* Insulate the duct and cut connection.
CAUTION
The air conditioner cannot take in fresh air by itself. When
connecting a fresh air duct, always use a duct fan.
11
CUSTOMER GUIDANCE
Explain the following to the customer in accordance with the operating
manual:
(1) Starting and stopping method, operation switching, temperature ad-
justment, timer, air flow switching, and other remote control unit op-
erations.
(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 changed
(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.
PART NO. 9378016019
Indoor unit
Printed circuit board
Setting Value
00
01
02
03
Setting Value
00
01
Setting Value
Setting record
00
• Record any changes to the settings in the following table.
01
Setting Setting Value
Ceiling height
Outlet directions
Filter sign
Cooler room temperature
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
Remote control unit
and turn it on again.
signal code
A (Primary setting)
b
c
d