Fujitsu Airstage V series User manual

DESIGN BY TAKASHI UTSUMI
Variable Refrigerant Flow System
Multi Air Conditioning System for Buildings
SERVICE MANUAL
TM

CONTENTS
1. TEST RUN
1-3 TEST RUN CONTROL................................................................................................
1-2-1 Procedure.............................................................................................................
1-2-2 Test Run From Outdoor PC Board.......................................................................
2-2 MICROPROCESSOR FUNCTION LIST.....................................................................
2-1 PCB LAYOUTS...........................................................................................................
2. FUNCTION OF PRINTED CIRCUIT BOARD
1-2 TEST RUN METHOD..................................................................................................
1-1 CHECK ITEMS BEFORE TEST RUN.........................................................................
2-1-2 Outdoor Unit Control Circuit Board......................................................................
2-1-1 Indoor Unit Control Circuit Board.........................................................................
2-1-3 Wired, Simple Remote Controller Circuit Board..................................................
2-2-1 Indoor Unit............................................................................................................
2-2-2 Outdoor Unit.........................................................................................................
2-3 FUNCTION AND SETTING OF EACH SWITCH........................................................
2-3-1 Indoor Unit ...........................................................................................................
2-3-2 Indoor Unit (COMPACT WALL MOUNTED TYPE)..............................................
2-3-3 Outdoor Unit.........................................................................................................
2-4 EXTERNAL INPUT & OUTPUT..................................................................................
2-4-1 Indoor Unit ...........................................................................................................
2-4-2 Indoor Unit (COMPACT WALL MOUNTED).......................................................
1-2-3 Test Run From Remote Controller.......................................................................
02-01
02-01
02-03
02-04
02-11
02-11
02-14
02-15
02-15
02-18
02-22
02-36
02-36
02-38
01-01
01-03
01-03
01-04
01-04
01-06
2-1-4 Central Remote Controller Circuit Board............................................................. 02-05
2-1-5 Network Convertor Circuit Board......................................................................... 02-06
2-1-6 Signal Amplifier Circuit Board.............................................................................. 02-08
2-1-7 Group Remote Controller Circuit Board............................................................... 02-09
2-1-8 External Switch Controller Circuit Board.............................................................. 02-10
2-3-4 Wired, Simple Remote Controller........................................................................ 02-27
2-3-5 Central Remote Controller................................................................................... 02-28
2-3-6 Network Convertor............................................................................................... 02-30
2-3-7 Signal Amplifier.................................................................................................... 02-32
2-3-8 Group Remote Controller..................................................................................... 02-32
2-3-9 External Switch Controller................................................................................... 02-33
2-4-3 Outdoor Unit........................................................................................................ 02-40
2-4-4 Central Remote Controller / PC Controller.......................................................... 02-41
2-4-5 Network Convertor............................................................................................... 02-43

CONTENTS
3-1-3 Basic Circuit of 3 Phase Inverter.........................................................................
3-1-2 Inverter Block of Outdoor Unit.............................................................................
3-1-1 What is Inverter...................................................................................................
3-1 INVERTER CONTROL...............................................................................................
3. INVERTER CONTROL
3-1-4 PWM Control (General Consideration)..............................................................
3-2 CIRCUIT DESCRIPTION............................................................................................
03-01
03-01
03-01
03-02
03-02
03-03
3-2-3 Power Relay & Resistor.......................................................................................
3-2-2 Current Transformer............................................................................................
3-2-1 Filter PCB............................................................................................................
3-2-4 Coil (Reactor)......................................................................................................
03-03
03-03
03-03
03-03
3-2-6 IGBT (Insulated Gate Bipolar Transistor)...........................................................
3-2-5 Smoothing Capacitor........................................................................................... 03-03
03-03
4-1 INPUT / OUTPUT LIST..............................................................................................
4. OUTDOOR UNIT OPERATION CONTROL
4-2 COMPRESSOR OPERATION....................................................................................
04-01
04-02
04-02
04-03
4-2-4 Oil Return Control................................................................................................
4-2-3 Frequency Range of Start,Stop,and Operation...................................................
4-2-2 Capacity Control.................................................................................................
04-02
4-2-1 Operation / Stop Condition.................................................................................
4-2-5 Compressor Sequence Operation.......................................................................
04-03
04-04
4-5 SPECIAL OPERATION.............................................................................................. 04-06
04-06
04-07
4-5-2 Oil Balance Operation........................................................................................
4-5-1 Oil Recovery Operation......................................................................................
4-6 PROTECTIVE FUNCTION........................................................................................ 04-10
04-10
4-6-1 Protective Function List......................................................................................
4-5-3 Pre-Heat Operation............................................................................................ 04-08
4-5-4 Defrost Operation Control.................................................................................. 04-09
4-3 FAN CONTROL.......................................................................................................... 04-05
4-4 EXPANSION VALVE CONTROL............................................................................... 04-06
04-05
04-06
4-3-3 Snow Falling Protection Fan Mode.....................................................................
4-3-1 Cooling Operation...............................................................................................
04-05
4-3-2 Heating Operation...............................................................................................

CONTENTS
5-2 MASTER CONTROL..................................................................................................
5-1-2 "AUTO" Position...................................................................................................
5-1-1 Fan Speed Setting...............................................................................................
5-1 FAN CONTROL..........................................................................................................
5. INDOOR UNIT OPERATION
5-2-1 Operation Mode Control.......................................................................................
5-2-2 Auto Changeover.................................................................................................
05-01
05-01
05-01
05-02
05-02
05-02
5-3 LOUVER CONTROL..................................................................................................
5-2-4 "FAN" Position.....................................................................................................
5-2-3 "COOL" Position.................................................................................................. 05-03
5-2-4 "HEAT" Position.................................................................................................. 05-03
05-03
05-04
5-5 DRAIN PUMP OPERATION.......................................................................................
5-4 ELECTRONIC EXPANSION VALVE CONTROL......................................................
5-6 FUNCTION..................................................................................................................
05-07
05-07
05-08
5-6-1 Auto Restart......................................................................................................... 05-08
6-1-3 Operation Not Trouble.........................................................................................
6-1-2 Outdoor Unit Display...........................................................................................
6-1-1 Indoor Unit Display..............................................................................................
6-1 NORMAL OPERATION..............................................................................................
6. TROUBLE SHOOTING
6-2 ABNORMAL OPERATION.........................................................................................
6-2-1 Indoor Unit Display..............................................................................................
06-01
06-01
06-02
06-03
06-04
06-04
6-2-4 Trouble Level of System......................................................................................
6-2-3 Outdoor Unit Display............................................................................................
6-2-2 Remote Controller................................................................................................
6-3 TROUBLE SHOOTING...............................................................................................
06-05
06-06
06-07
06-08
6-3-3 Trouble Shooting With Error Code (OUTDOOR UNIT)........................................
6-3-2 Trouble Shooting With Error Code (INDOOR UNIT)...........................................
6-3-1 How to Trouble Shoot From the Symptom..........................................................
6-3-4 Trouble Shooting With No Error Code.................................................................
6-3-5 Trouble Shooting for Optional Parts.....................................................................
06-08
06-09
06-20
06-60
06-65
6-4 SERVICE INFORMATION.......................................................................................... 06-83
6-5 SERVICE PARTS INFORMATION............................................................................. 06-88
5-6-2 Icing Protection Control....................................................................................... 05-08
5-6-3 Oil Recovery Operation....................................................................................... 05-08
5-7 TIMER CONTROL...................................................................................................... 05-09
5-7-1 Wireless Remote Controller................................................................................ 05-09
5-7-2 Group Remote Controller..................................................................................... 05-11
5-7-3 Wired Remote Controller..................................................................................... 05-13
6-4-3 Work procedure after the backup operation.........................................................
6-4-2 Heating backup operation....................................................................................
6-4-1 Cooling backup operation.................................................................................... 06-83
06-85
06-87

CONTENTS
7-2-1 Pressure Sensor.........................................................................................
7-2 CHARACTERISTICS OF SENSORS.........................................................................
7-1 REFRIGERANT PIPE SYSTEM DIAGRAM...............................................................
7. APPENDING DATA
7-3 WIRING DIAGRAM.....................................................................................................
7-3-1 Indoor Unit......................................................................................................
07-01
07-05
07-05
07-08
07-08
7-4 OUTDOOR INTERNAL LAYOUT...............................................................................
7-3-2 Outdoor Unit.................................................................................................. 07-21
07-25
7-5 MODEL DESIGNATION..............................................................................................07-30
8-2 INDOOR UNIT............................................................................................................
8-1 OUTDOOR UNIT........................................................................................................
8. DISASSEMBLY ILLUSTRATION & PARTS LIST
08-01
08-23
8-3 STANDARD ACCESSORIES UNIT........................................................................... 08-23

1 . TEST RUN

1-1 CHECK ITEMS BEFORE TEST RUN
01-01
1. TEST RUN
Before test run, check the following items.
Outdoor
unit
(Slave 2)
3 50Hz
380-415V
1 50Hz 220-240V
1 50Hz
220-240V
Wired remote controller
Transmission line
Central remote
controller
Outdoor
unit
(Master)
Outdoor
unit
(Slave 1)
Indoor
unit
Indoor
unit
Installation
location
Installation
environment
Outdoor unit
Indoor unit
Outdoor unit
Indoor unit
Select a place where noise and vibration will be low.
Select a place to provide adequate strength.
Fasten the outdoor unit securely.
Install the outdoor unit in a location
where it will avoid getting wet from rain.
Install the unit where it will not be tilted by more than 3deg.
The work space to repair is secured enough.
If possible,do not install the unit
where it will be exposed to direct sunlight.
Select a place where noise and vibration will be low.
Select a place to provide adequate strength.
Fasten the outdoor unit securely. (Should not drop.)
The Service hole is secured specified position
and appointed size.
DESIGN&TECHNICAL DATA
4-5 DIMENSIONS
DESIGN&TECHNICAL DATA
6-1-1 INSTALLATION OF OUTDOOR UNIT
DESIGN&TECHNICAL DATA
3-5 INSTALLATION SPACE
4-5 DIMENSIONS
The work space to repair is secured enough.
Installation
condition
Outdoor / Indoor unit are installed based on specifications.
(Ex. In the same refrigerant system,difference in height between
outdoor units and indoor units.
In the same refrigerant system,difference in height between
outdoor unit and outdoor unit.
In the same refrigerant system,difference in height between
indoor units and indoor units.)
INSTALLATION MANUAL
2-1 SELECTING THE MOUNTING POSITION
INSTALLATION MANUAL
SELECTION THE MOUNTING POSITION
(Compact Duct Type)
SELECTION THE MOUNTING POSITION
(Duct Type)
SELECTION THE MOUNTING POSITION
(Wall Mounted Type)
Section Description Check
field
check item Standard
Piping Use the piping size,material and thickness
as per specifications.
DESIGN&TECHNICAL DATA
6-2 PIPING DESIGN
The Separation tube as per specifications
are used correctly.
( Ex. Piping size, Installation angle )
DESIGN&TECHNICAL DATA
6-2-4 PIPE SIZE
INSTALLATION MANUAL
3-2 OPTIONAL PART
DESIGN&TECHNICAL DATA
6-2-3 LIMITATIONS
The piping length is within the limits of specifications.
There are not impossible bending and crushing of piping.
There are no gas leaks.
Draw a vacuum enough with a vacuum pump.
Charge a suitable amount.
Using a special R410A gauge manifold and charging hose.
DESIGN&TECHNICAL DATA
6-2-6 ADDITIONAL CHARGE CALCULATION
Fully open respective stop valves on liquid, gas, oil.
Additional refrigerant
charge
3 way valve
Seal with nitrogen up to 4.15 Mpa.
After 24 hours, check that the pressure
has not fallen by leak.
Vacuuming When -76 cmHg is reached, operate
the vacuum pump for at least 1 hour.
Piping length
Gas leakage check
Piping size,material
and thickness
T-shaped tube kit and
Separarion tube kit
specification
Section Description Check
field
check item Standard

01-02
Others Use the Pipe heat insulating material
as per specifications.
DESIGN&TECHNICAL DATA
6-2-5 SELECTION OF PIPE HEAT
INSULATIONG MATERIAL
Drain
hose
Indoor unit Drain water does not collects in the middle of drain hose. INSTALLATION MANUAL
6. INSTALLING DRAIN HOSE
(Compact Duct Type)
5. INSTALLING DRAIN HOSE (Duct Type)
1. INDOOR UNIT INSTALLATION
(Wall Mounted Type)
Install the drain hose with downward
gradient (1/50 to 2/50) and so there are no rises or
traps in the hose.
Wiring Use the power supply cable as per specifications.
There are not deficient phase, miss wiring, and breaking
of wire for each indoor unit and outdoor unit.
DESIGN&TECHNICAL DATA
6-3-2 POWER SUPPLY CABLE WIRING
3-10 ELECTRIC CHARACTERISTICS
4-4 ELECTRIC CHARACTERISTICS
DESIGN&TECHNICAL DATA
6-3-3 TRANSMISSON LINE
DESIGN&TECHNICAL DATA
6-3-2 POWER SUPPLY CABLE WIRING
3-10 ELECTRIC CHARACTERISTICS
DESIGN&TECHNICAL DATA
6-3-1 WIRING SPECIFICATION
Use the ground wire as per specifications.
There are not miss wiring, and breaking of wire. INSTALLATION MANUAL
8 ELECTRICAL WIRING (Compact Duct Type)
7 ELECTRICAL WIRING (Duct Type)
6 ELECTRICAL WIRING (Wall Mounted Type)
5 OUTDOOR UNIT WIRING SETTING
INSTALLATION MANUAL
8 ELECTRICAL WIRING (Compact Duct Type)
7 ELECTRICAL WIRING (Duct Type)
6 ELECTRICAL WIRING (Wall Mounted Type)
5 OUTDOOR UNIT WIRING SETTING
INSTALLATION MANUAL
8 ELECTRICAL WIRING (Compact Duct Type)
7 ELECTRICAL WIRING (Duct Type)
6 ELECTRICAL WIRING (Wall Mounted Type)
INSTALLATION MANUAL
6-5 TERMINAL RESISTOR SETTING
Use the breaker as per specifications.
Use the ground wire as per specifications.
There are not miss wiring, and breaking of wire.
The wiring length is within the limits of specifications.
Use the transmission cable as per specifications.
There are not miss wiring, and breaking of wire
for each indoor unit and outdoor unit.
Use the terminal resistor that came with the master unit.
Use the remote controller cable as per specifications.
Connect the remote controller cable correctly.
Section Description Check
field
System Address
setting
Refrigeration circuit Set all the address. And avoid overlapping. DESIGN&TECHNICAL DATA
6-4-2 ADDRESS SETTING
Indoor unit
Outdoor unit
Remote controller
Others Outdoor unit
capacity
Check current setting. If the setting is wrong,
set the DIP SW as per specifications. (For outdoor unit)
DESIGN&TECHNICAL DATA
6-6-2 SWITCH FUNCTION
Number of
slave unit
Check current setting. If the setting is wrong,
set the DIP SW as per specifications. (For outdoor unit)
(Only for master unit)
Pipe length Check current setting. If the setting is wrong,
set the DIP SW as per specifications. (For outdoor unit)
(Only for master unit)
Refrigerant type Check current setting. If the setting is wrong,
set the DIP SW as per specifications. (For indoor unit)
DESIGN&TECHNICAL DATA
6-6-2/6-6-6 SWITCH FUNCTION
Connected
outdoor unit
Check current setting. If the setting is wrong,
set the DIP SW as per specifications. (For indoor unit)
System
distribution diagram
System distribution diagram (Piping distribution diagram,
Wiring distribution diagram and
Address distribution diagram) shall be always updated.
check item Standard
Terminal resistor
Remote controller cable
Breaker
Transmission cable
Power supply cable
Pipe heat insulating
material
Section Description Check
field
check item Standard
Section Description Check
field
check item Standard

1-2 TEST RUN METHOD
01-03
1-2-1 Procedure
Procedure Check item check
field
Procedure Check item check
field
1. Turn on
outdoor unit power
Supply power to the crankcase heater for 12 hours prior to
the start of operation if the outdoor temperature is lower than 20
There are not instrument anomalies.
LED 1 lights. (For master unit & slave unit)
2. Turn on
indoor unit power
There are not instrument anomalies.
Blinking Operation indicator and Timer indicator alternately.
The middle of the screen displays " "mark.(Simple Remote Controller)
The middle of the screen displays time.(Wired Remote Controller)
Operation Check
Turn Power On
Operate all of
the indoor units
The address reading check
which uses the Service tool
Check the all of the indoor units and outdoor units on the Service tool
Abnormal noise
and abnormal vibration
There are no abnormal noise or abnormal vibration.
Water drain Check the indoor units for water leaks.
Drain the water without accumulating.
Check intake
and exhaust air temperatures
Intake - exhaust air temperature differential is 10 and over (Cooling),
15 and over. (Heating).
Operate
one indoor unit
Fan rotation Check the operation in each fan mode.
Abnormal noise
and abnormal vibration
There are no abnormal noise or abnormal vibration.
Water drain Check the indoor units for water leaks.
Drain the water without accumulating.
Check intake
and exhaust air temperatures
Intake - exhaust air temperature differential is 10 and over (Cooling),
15 and over. (Heating).
Operate
the outdoor unit
Compressor operation The compressor operates.
(Check by noise of operation and blink of LED3.)
Run the indoor units one at a time,
and make sure that the corresponding outdoor units also run.
Fan rotation Check the operation in each fan mode.
Abnormal noise
and abnormal vibration
There are no abnormal noise or abnormal vibration.
Check high pressure
and low pressure
Cooling : low pressure 0.8 Mpa (approx.)
Heating : high pressure 3.0 Mpa (approx.)
Check discharge pipe temperature
Below 120
Check suction pipe temperature
Remote controller Operate the remote controller Operation by remote control can be performed by each remote controller.
( Simple RC, Wired RC and Wireless RC )

1-2-3 Test Run From Remote Controller
01-04
Short two metal contacts under the battery compartment lid, while the air conditioner is running.
To stop test run operation, push button of the wireless
remote controller.
When the air conditioner is being test run, the OPERATION
and TIMER lamps of indoor unit flash slowly at the same time. START/STOP button
Test run button
(Metal contacts)
TEST
RUN
UTB - YVB / GVB
2. Standard wireless remote controller
1-2-2 Test Run From Outdoor PC Board
All the indoor units connected to the outdoor unit can be test-operated by DIP switch setting. (Only for master unit)
SW1-1 SW1-2 Test Run Remarks
OFF OFF Normal operation
ON OFF Cooling test run OFF/OFF or ON/ON
ON
OFF Heating test run
ON ON Normal operation
ON/OFF
SW1-1/SW1-2:
OFF/ON or ON/OFF OFF/OFFSW1-1/SW1-2:
OFF/OFF or ON/ON OFF/ONSW1-1/SW1-2:
OFF/ON or ON/OFF ON/ON
SW1-1/SW1-2:
Stop the indoor unit. Push the button and
button simultaneously for more than two seconds.
The air conditioner will start to conduct a test run and " " will display on
the remote controller display.
However, the , setting button does not have function,
but all other buttons, displays, and protection functions will operate.
To stop test run, push the button of the standard wired remote
controller.
For the operation method, refer to the operating manual and perform operation
check.
Check that there are no abnormal sounds or vibration sounds during test run
operation.
Perform the test operation for 60 minutes.
DAY OFF
DELETE SET
ENERGY
SAVE THERMO SENSOR
SET BACK
DAY
CLOCK ADJUST
UTB-YUB / GUB / TUB
1. Standard wired remote controller

4. Central remote controller
CHECK
ACL MASTER
ENERGY ANTI
FAN
TIMER
SET
TIMER
DELETE
TIMER
DAY
CLOCK
ADJUST
DAY OFF
TEMP.
MEMORY
OPERATION
MEMORY
TEST
SET
CENTRAL
DELETE
BACK
GROUP
ZONE
ON OFF
TIME
CONTROL
CONTROL
FILTER
RESET
CONTROL
FREEZE
COPY
TIMER
MODE SAVE
SETTING SETTING
Push to select control mode from among Individual control mode / Group
control mode / All control.
When Group control mode is selected use to select the desired group number,
then go to (3).
SET
60 minutes' test run starts.
To stop the test run,
It is possible to change the settings for the operation mode (heating / cooling) and fan setting.
do the operation shown in (3) above and press .
ON OFF
will come on, then do the operation shown in (4). Test run will stop.
When Individual control mode is selected, use and to select the desir-
ed central control number, then go to (3).
When All control mode is selected, go directly to (3).
Press TEST and will light up. The operation setting is applied to the selected
units.
Press to send the signal and test run setting is sent to the indoor unit.
will flash as the signal is being transmitted.
(1) (2)
(3)(4)
(1)
(2)
(3)
(4)
SELECT
01-05
UTB-YCA / GCA
button
button and
Stop the indoor and outdoor units. Push the remote controller
simultaneously for more than three seconds. The air conditioner will start to conduct a test
run and will display on the temperature display.
SET
However the setting button does not have function but all other buttons,
displays and protection functions will operate.
To stop test running press the button of the simple remote controller.
For the operation method refer to the operating manual and perform operation check.
Check that there are no abnormal sounds or vibration sounds during test run operation.
UTB-YPB / GPB / TPB
3. Simple remote controller

1-3 TEST RUN CONTROL
01-06
1. When the test run signal is transmitted from standard wired, wireless remote controller,
simple remote controller and central remote controller.
(1) The test run operation starts and the electric expansion valve is controlled to a maximum flow, regardless of
the temperature condition.
(2) Frost prevention operation has priority over item(1).
(3) After 60 minutes passes, the test run stops.
2. When the test run signal is transmitted from the outdoor unit.
(1) Whether state of the indoor unit operates or stops, All units in the same refrigerant system will start to conduct a
test run in accordance with the operation mode set by DIP SW 1-1 and SW 1-2 of outdoor unit ( see 1 - 2 - 2 ).
(2) Test running initialization is shown below.
Fan speed Hi Hi
Room Temperature Indication 18 30
Hi Hi
18 30
Vertical Air Direction Panel
Swing
Operating Mode
Cooling Heating Cooling Heating
OFF OFF
Position 1Position 4
EXCEPT FOR THE DUCT MODEL DUCT TYPE
CEILING TYPE
COMPACT CASSETTE TYPE
COMPACT WALL MOUNTED TYPE
4
3
2
1
1
2
3
4
4
3
2
1
1
2
3
4
*ENSAMPLE

2 . FUNCTION OF PRINTED CIRCUIT BOARD

2-1 PCB LAYOUTS
2. FUNCTION OF PRINTED CIRCUIT BOARD
02-01
2-1-1 Indoor Unit Control Circuit Board
SWITCH POSITION
MODELS : AUXB, AU A, AR B07-18, ARXB, ARXA, ARXC, AB A, AS A18-30, AW A
CN27
CN23 CN24
CN22 CN21
SW1 SW2
SW3 SW4 SW5
SW7
SW9
SW6
SW8
SW10
1 Forbidden
Forbidden
Forbidden
2
3 Room temp correct coefficient of heating 1
4 Room temp correct coefficient of heating 2
1 Room temp correct coefficient of cooling
2
3 Refrigerant type
4 Auto restart validity / invalidity
1 Forbidden (Indoor unit fan speed switch 1)
2 Forbidden (Indoor unit fan speed switch 2)
3 Forbidden (Indoor unit fan speed switch 3)
4 External input select edge / pulse
1 Forbidden (Indoor unit model code)
2 Forbidden (Indoor unit model code)
3 Forbidden (Indoor unit model code)
4 Forbidden (Indoor unit model code)
1 Wireless remote controller custom code switch 1
2 Wireless remote controller custom code switch 2
3 Outdoor unit series setting
4 Draft prevention setting switch
Indoor unit address switch 1
Indoor unit address switch 2
Refrigerant circuit address switch 1
Refrigerant circuit address switch 2
Remote controller address switch
SW 9
SW 10
Rotary SW
SW 1
SW 2
SW 3
SW 4
SW 5
DIP-SW
SW 6
SW 7
SW 8
AUXB, AU A, ARXB, ARXA, AB A AS A18-30, AW A
CN23
CN22
CN24
CN21
SW1
SW2
SW3
SW4
SW5
SW7
SW9
SW6
SW8 SW10

SWITCH POSITION
Compact wall mounted type indoor unit control circuit board
Controller PCB
02-02
2.COMPACT WALL MOUNTED TYPE
MODELS : AS E07-14
1 Forbidden (Indoor unit fan speed switch 1)
2 Forbidden (Indoor unit fan speed switch 2)
3 Forbidden
4 External input select edge / pulse
1 Forbidden (Indoor unit model code)
2 Forbidden (Indoor unit model code)
3 Forbidden
4 Auto restart validity / invalidity
1 Wireless remote controller custom code switch 1
2 Wireless remote controller custom code switch 2
3 Outdoor unit series setting
4 Refrigerant type
1 Indoor unit address switch 2
2 Indoor unit address switch 3
3 Forbidden
4 Forbidden
1 Refrigerant circuit address switch 2
2 Refrigerant circuit address switch 3
3 Refrigerant circuit address switch 4
4 Forbidden
Indoor unit address switch 1
Refrigerant circuit address switch 1
Remote controller address switch
Rotary SW
DIP SW
SW 1
SW 2
SW 3
SW 4
SW 5
SW 6
SW 7
SW 8
DIP SWITCH (SW1~5)
Example : SW3
ON
OFF
SW
3-1
SW
3-2
SW
3-4
SW
3-3
CN8
CN9
SW1SW2SW3SW4SW5
SW8 SW7 SW6

02-03
2-1-2 Outdoor Unit Control Circuit Board
CN52CN50
CN49
CN48
SW1 SW2 SW4SW3
SW5 SW6 SW10SW7
LED1 SW9 SW8
LED2
LED3
LED4
LED5
LED6
Outdoor unit control circuit board
SWITCH POSITION
1 Test run (Cooling)
2 Test run (Heatling)
3 Pump down operation
4
1 Silent operation mode
2 Snow falling protection fan mode
3 Sequential start shift switch 1
4 Sequential start shift switch 2
1 Outdoor unit capacity switch 1
2 Outdoor unit capacity switch 2
3 Outdoor unit address setting switch 1
4 Outdoor unit address setting switch 2
1 Number of slave unit connection 1
2 Number of slave unit connection 2
3
4 Error reset
Forbidden
Forbidden
1 Cooling capacity shift switch 1
2 Cooling capacity shift switch 2
3 Heating capacity shift switch 1
4 Heating capacity shift switch 2
1 Pipe length switch 1
2 Pipe length switch 2
3 Forbidden
4 Forbidden
1 System type switch 1
2
3 Indoor unit small capacity switch
Forbidden
4 Forbidden
1 Forbidden
2 Forbidden
3 Forbidden
4 Forbidden
Refrigerant circuit address switch 1
Refrigerant circuit address switch 2
SW 8
SW 9
DIP SW
Rotary SW
SW 1
SW 2
SW 3
SW 4
SW 5
SW 6
SW 7
SW 10

02-04
2-1-3 WIRED, SIMPLE REMOTE CONTROLLER CIRCUIT BOARD
MODEL : UTB - PB MODEL : UTB - RA
SWITCH POSITION
Wired remote controller
Simple remote controller
DIP Switch
Front case (back side)
ONOFF
1
2
3
4
5
6
ON
OFF
1 2 3 4 5 6
DIP switch
ON
OFF
1 2 3 4 5 6
DIP switch
Wired, simple remote controller
DIP SW
Dual remote controller setting
Group control setting
Model setting
Auto changeover setting
1
2
3
4
5
6Memory backup setting (Wired remote controller only)
MODEL : UTB - UB

02-05
2-1-4 Central Remote Controller Circuit Board
DIP SW2
DIP SW3 SWITCH 42
DIP SW
1
2
3
4
5
6
7
8
1
2
3
4
RC operation prohibit function validity/invalidity
Central remote controller
SW 2
Filter sign indication ON / OFF
Forbidden
Forbidden
Memory backup setting ON / OFF
Initial setting
External input validity / invalidity
External input select edge / pulse
Forbidden
Forbidden
Forbidden
Forbidden
SW 3
SW 42
Temperature display C / F
o o
Central remote controller (UTB-YCA / UTB-GCA)

02-06
2-1-5 Network Convertor Circuit Board
1. Network convertor (UTR-YRDA)
Forbidden
Wired remote controller validity / invalidity
External input validity / invalidity
External input select edge / pulse
Auto changeover validity / invalidity
Auto restart validity / invalidity
Refrigeration circuit address 1
SWITCH POSITION
Indoor unit control method
Number of connected indoor units
Refrigeration circuit address 2
DIP SW
1
2
3
4
5
6
7
8
1
2
1
2
Network convertor (UTR-YRDA)
SW 103
SW 107
SW 109
1
2
Rotary SW
Push SW
SW 108
SW 110
SW 111
Software reset
SW 104
SW111
SW109
SW103
SW107
SW110
SW108
D129
SW105
SW101 SW102SW104
CN109
CN108
CN105

02-07
2. Network convertor (UTR-YLLA)
Item
SW1
SW2
SW3
SW4
SW8
SW7
Push switch
Push switch
Push switch
Push switch
Push switch
Push switch CPU reset
Forbidden
DetailsType
Forbidden
Service pin It is used for the commissioning.
It is used for the initial setting.
It is used to display the mode of the network convertor mode.
It is used for the back up battery setting.
It is used for the initial setting. The CPU will be reset.
Set button
Forbidden
JP1 Jumper switch Back up battery
D19 LED Forbidden
SWITCH POSITION
SW3 SW4
JP1
SW7 SW2
SW1
D19
SW8