Fujitsu UTF-Y90A4A Service Manual

Multi Air Conditioning System
for Buildings

VRF (FREELY SELECTABLE MULTI TYPE SYSTEM)

SERVICE MANUAL

CONFIDENTIAL

Multi Air Conditioning System

for Buildings

VRF (FREELY SELECTABLE MULTI TYPE SYSTEM)

SERVICE MANUAL

– 2 –

CONTENTS

1. OUTLINE OF SYSTEM

1-1

MODEL CONSTRUCTION

1-2

SYSTEM CONSTRUCTION CONDITIONS

1-2-1
1-2-2

1-3

(1)
(2)

REFRIGERANT PIPING

SYSTEM WIRING
ADDRESS SETTING
KINDS OF ADDRESS AND SETTING RANGE
EXAMPLES OF SYSTEM SETTING

................................................................................................

................................................................................................

2. TEST RUN ADJUSTMENT

CHECK ITEMS BEFORE TEST RUN

2-1
2-2

2-2-2

OUTDOOR PC BOARD2-2-1

TEST OPERATION USING REMOTE CONTROLLER
TEST RUN CONTROL2-3

................................................................................................TEST RUN METHOD

3. REFRIGERANT PIPE SYSTEM DIAGRAM

COOLING ONLY / HEAT PUMP TYPE3-1

3-2

4. FUNCTION OF PRINTED CIRCUIT BOARD

PCB LAYOUTS4-1
MICROPROCESSOR BLOCK DIAGRAM4-2
MICROPROCESSOR FUNCTION LIST4-3
FUNCTION AND SETTING OF EACH SWITCH4-4
INDOOR UNIT
OUTDOOR UNIT
REMOTE CONTROLLER

..........................................................................................................

..........................................................................................................

.......................................................................................................

5. OUTDOOR UNIT OPERATION CONTROL

5-1

COMPRESSOR OPERATION CONTROL
5-1-1
5-1-2
5-1-3

5-2
5-3
5-4
5-5
5-6
5-7
5-8
5-9
5-10
5-11
5-12
5-13

OPERATION STOP CONDITION
COMPRESSOR OUTPUT PATTERN
3 MINUTES RESTART PREVENTION ( 3 MIN ST )

HEAT EXCHANGER CAPACITY CONTROL

OUTDOOR FAN MOTOR CONTROL

EXPANSION VALVE 1/2 CONTROL

FOUR-WAY VALVE 1 CONTROL

CIRCULATING SAVE AMOUNT CONTROL

SOLENOID VALVE 2 CONTROL

FOUR-WAY VALVE 5 CONTROL

DEFROSTING CONTROL

OIL RETURN CONTROL
OIL RECOVERY CONTROL
PROTECTION FUNCTION
PUMP DOWN CONTROL

......................................................................................

......................................................................................

......................................................................

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......................................................................................

...........................................................................................

....................................................................

.........................................................................................HEAT RECOVERY TYPE

.................................................................

....................................................................

........................................................................................ 36

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– 3 –

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...............................................................

..........................................

.......................................................5-1-4 COMPRESSOR RECOVERY OPERATION

............................................................

............................................................

12
13
13
15

19
20
20
20
22

23
24

25
26
28
30
30
34

43
43
43
43
44
45
46
48
49
5
51
52
53
54
55
56
57

5
7
7

0

6. INDOOR UNIT OPERATION

6-1 TIMER CONTROL
6-2 FAN CONTROL

6-2-1

6-3

6-3-3
6-3-4
6-3-5

6-5
6-6
6-7

"AUTO" POSITION .............................................................................................

"LOW" "MED" AND "HIGH" POSITION6-2-2

MASTER CONTROL

OPERATION MODE CONTROL ...........................................................................

"COOL" POSITION
"HEAT" POSITION

"FAN" POSITION
LOUVER CONTROL6-4
ELECTRONIC EXPANSION VALVE CONTROL
AUTO RESTART
DRAIN PUMP OPERATION

..................................................................................................... 59

..........................................................................................................

..................................................................................................

..............................................................................................."AUTO" POSITION6-3-2

...............................................................................................

...............................................................................................

.................................................................................................

.................................................................................................

......................................................................................................

....................................................................................

7. WIRING DIAGRAM

INDOOR UNIT
OUTDOOR UNIT

............................................................................................................

.........................................................................................................

8. TROUBLESHOOTING

8-1

INDOOR UNIT
8-1-1
8-1-2

8-2-1 NORMAL OPERATING DISPLAY

8-4

8-5-1 CHARACTERISTICS OF THERMISTOR

8-5-3 ELECTRIC EXPANSION VALVE

NORMAL OPERATION DISPLAY
ABNORMAL OPERATION DISPLAY

OUTDOOR UNIT8-2

ABNORMAL OPERATION DISPLAY8-2-2
REMOTE CONTROL UNIT8-3
ERROR CODE & TROUBLESHOOTING

INDOOR UNIT TROUBLESHOOTING 91...................................................................

OUTDOOR UNIT TROUBLESHOOTING 96................................................................

CENTRAL REMOTE CONTROLLER TROUBLESHOOTING .................................

OTHERS8-5

PRESSURE SENSOR8-5-2

RB UNIT (HEAT RECOVERY TYPE ONLY)8-5-4

OTHERS8-5-5

............................................................................................................

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.......................................................................................

...................................................................................................................

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.................................................................

........................................................................

....................................................................

........................................................................

...................................................................

................................................................

.......................................................TROUBLESHOOTING (NO ERROR CODE)8-4-1

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........................................................................

........................................................

1

64
64
64
65
656-3-1
65
69
69
70
71

74......................................................

74
74

75
83

84
84
85
88
88
89
90
91

091
141
24
241
261
261
261
261

9. IN USE OF THE NEW REFRIGERANT R407C

10. DISASSEMBLY ILLUSTRATION

11. PARTS LIST

................................................................................................................

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– 4 –

...................................................

291
341
731

1. OUTLINE OF SYSTEM

1-1 MODEL CONSTRUCTION

■ OUTDOOR UNITS

TYPE

COOLING ONLY
HEAT PUMP
HEAT RECOVERY

POWER SOURCE

3 PHASE 4 LINE

380 415V 50Hz
380 415V 50Hz

380 415V 50Hz

CAPACITY RANGE

28.0 kW

28.0 kW

28.0 kW

Compact size

1,380

1,300

Serial installation possible

650

■ INDOOR UNITS

10 types, 39 models ranging from 2.15kW to

17.0kW.

Type

Capacity

kw Model code

14.1

(17.0)

12.7

10.5

8.8

6.8

(7.05)

5.3

(5.7)

4.05

3.6

2.8

2.15

54

(60)

45
36
30

24

(25)

18

(20)

14
12

Ceiling/
Floor

9
7

Ceiling

(High Static

Pressure)

Cassette

(compact)

: 2002

CassetteDuctDuctDuct Duct

Wall

mounted

Wall

mounted

– 5 –

UTR-BP54A Less than 60
UTR-BP90A More than 61 or more
UTR-BP54R Less than 60
UTR-BP90R More than 61 or more

Model Max. connectable indoor units
UTF-Y90A4A 4
UTF-Y54A1A 1

Type Model Total model code of connectable indoor unit

Heat pump

Heat recovery

UTR-HD906A 3 6
UTR-HD908A 7 8
UTR-HD906R 3 6
UTR-HD908R 7 8

Type Model

Connectable indoor units
Cooling only
Heat pump

Heat recovery

RB (REFRIGERANT BRANCH) UNIT

SEPARATION TUBE

Above units are required during heat recovery operation.

HEADER

Cooling only

– 6 –

■

1-2 SYSTEM CONSTRUCTION CONDITIONS

1-2-1 REFRIGERANT PIPING

COOLING ONLY / HEAT PUMP MODEL

a+e 100m (actual pipe length)
Difference in height between outdoor unit and indoor units (H1) maximum 50m.

(For the outdoor unit stated below:maximum 40m)

Difference in height between adjacent indoor units (H2) maximum 15m.

e 40m (actual pipe length)

a 70m (actual pipe length)

a+b+c+d+e 200m (total pipe length)

Outdoor

unit

a

H1

H2

Indoor

unit

Indoor

unit

Indoor

unit

dcb

Indoor

unit

e

a+b+c+d+e+f 100m (actual pipe length)
Difference in height between outdoor unit and indoor units (H1) maximum 50m.

Difference in height between adjacent indoor units (H2) maximum 15m.
From outdoor unit to first separation tube a 70m (actual pipe length)
b+c+d+e+f 40m (actual pipe length)

a+b+c+d+e+f+g+h+i+j+k 200m (total pipe length)

Outdoor

unit

a

bcde

g h i j k

Indoor

unit

Indoor

unit

Indoor

unit

Indoor

unit

Indoor

unit

H2

Indoor

unit

H1

f

a+g+i 100m a+b+f 100m (actual pipe length)
Difference in height between outdoor unit and indoor units (H1) maximum 50m.

Difference in height between adjacent indoor units (H2) maximum 15m.

a 70m (actual pipe length)

g+i 40m b+f 40m (actual pipe length)
a+b+c+d+e+f+g+h+i 200m (total pipe length)

Outdoor

unit

h

Indoor

unit

b

– 7 –

Indoor

unit

Indoor

unit

f

H2

edc

i

Indoor

unit

Indoor

unit

Indoor

unit

H1

a

g

PIPE SIZE

COOLING ONLY / HEAT PUMP MODEL

Pipe size connected to outdoor unit.

Model Gas Pipe Liquid Pipe

AO 90 28.58 12.7

Between two adjacent refrigerant branch kits.

(unit : mm)

(unit : mm)

Total model code of

Gas Pipe Liquid Pipe Separation Kit

indoor unit

Less than 30 15.88 9.53

UTR-BP54A

31 or more to 60 19.05 9.53

61 or more 28.58 12.7 UTR-BP90A

Connection pipe size of indoor unit.

(unit : mm)

Model code of indoor unit Gas Pipe Liquid Pipe

7, 9 9.53 6.35
12, 14

( )

18

12.7 6.35

18, 20, 24, 25 15.88 6.35

30

15.88

9.53

36, 45, 54, 60 19.05 9.53

Cassette(compact) only

– 8 –

■

HEAT RECOVERY MODEL

a+e 100m (actual pipe length)
Difference in height between outdoor unit and indoor units (H1) maximum 50m.

(For the outdoor unit stated below : maximum 40m)

Difference in height between adjacent indoor units (H2) maximum 15m.
Difference in height between RB unit and RB unit (H3) 15m or less.

Difference in height between

RB unit and indoor unit (H4) 5m or less

e

40m (actual pipe length)

f

10m (actual pipe length)

a+b+c+d+e 200m (total pipe length)

.

Outdoor

unit

a

H1

a+b+c+d+e+f 100m (actual pipe length)

b

RB

unit

Indoor

unit

c

Indoor

RB

unit

unit

RB
unit

Indoor

unit

d

RB
unit

H2

Indoor

unit

Difference in height between outdoor unit and indoor units (H1) maximum 50m.
Difference in height between adjacent indoor units (H2) maximum 15m.
Difference in height between RB unit and indoor unit (H3) 5m or less.

From outdoor unit to first separation tube a 70m (actual pipe length)

b+c+d+e+f 40m (actual pipe length)

10m (actual pipe length)

a+b+c+d+e+f+g+h+i+j+k 200m (total pipe length)

Outdoor

unit

a

bcde

g h i j k

RB

unit

Indoor

unit

RB

unit

Indoor

unit

RB
unit

Indoor

unit

RB

unit

Indoor

unit

RB
unit

Indoor

unit

H3

H2

Indoor

a+g+i 100m a+b+f 100m (actual pipe length)
Difference in height between outdoor unit and indoor units (H1) maximum 50m.
Difference in height between adjacent indoor units (H2) maximum 15m.
Difference in height between RB unit and RB unit (H3) 15m or less.
Difference in height between RB unit and indoor unit (H4) 5m or less.
g+i 40m b+f 40m (actual pipe length)

j 10m (actual pipe length)

a+b+c+d+e+f+g+h+i 200m (total pipe length)

Outdoor

unit

a

b

RB unit

4 brunch

RB
unit

unit

e

H3

H4, f

H1

f

H1

g

edc

RB

unit

Indoor

unit

H3

i

H2

Indoor

unit

Indoor

unit

Indoor

unit

Indoor

unit

– 9 –

h

RB
unit

Indoor

unit

H4

f

j

HEAT RECOVERY MODEL

Pipe size connected to outdoor unit.

(unit : mm)

Model Suction Gas Pipe

Discharge Gas Pipe

Liquid Pipe

AO 90 28.58 19.05 12.7

Between two adjacent refrigerant branch kits.

Total model code of Suction Discharge

Liquid Pipe

Separation Kit

indoor unit Gas Pipe Gas Pipe
Less than 30 15.88 12.7 9.53

UTR-BP54R

31 or more to 60 19.05 15.88 9.53

61 or more 28.58 19.05 12.7 UTR-BP90R

Connection pipe size of indoor unit.

(unit : mm)

(unit : mm)

Model code of indoor unit

Gas Pipe Liquid Pipe
7, 9 9.53 6.35
12, 14 12.7 6.35
18, 20, 24, 25 15.88 6.35

30

15.88

9.53

36, 45, 54, 60 19.05 9.53

– 10 –

ADDITIONAL CHARGE

Up to a pipe length of 7.5 m, charging with additional refrigerant is not necessary.
If the pipe length exceeds 7.5 m, charging with refrigerant is necessary.
Charge with additional refrigerant in the amounts shown in the table below.

(1) Pipe length

Liquid pipe (mm) 12.7 9.53 6.35
Additional refrigerant

0.1 0.05 0.03

(R407C) (kg/m)

(2) System type

It is necessary to add refrigerant to all connected Indoor unit.

Add refrigerant to the corresponding type as shown in the Table for every connected Indoor unit to the

refrigerant system.

Example : When AR30 x2 and AU18 x2 are connected to the refrigerant system.

" Additional charge of system type" is 1.0(kg)x2 +0.65(kg)x2=3.3(kg)

Model / Model code

AS
AU
AB

AR

0.65

0.4

7 9

0.65120.65

0.4

0.65

0.45

14

0.9

0.65

0.65

0.45

18

0.65

0.65

0.7

ADDITIONAL CHARGE = (1) + (2)

20

0.9

0.8

24/25

0.9

0.9

0.8

0.8

1.0

1.0

1.0

1.0

30

36

45

54

1.5

1.5

1.0

2.0

amount of refrigerant (kg)

1.0

2.0

1.5

1.0

60

2.0

– 11 –

1-2-2 SYSTEM WIRING

Use

Outdoor

2

unit
Indoor

Power supply
cable (mm )

unit

Transmission
cable (mm )

2

Wired remote control
cable (mm )

1,2

3

4 10m cable attached.

2

The grounding wire is not included in this cable.
Always ground the unit.

Do not bundle the transmission cable with other wires.
Transmission cable between each unit : 200m max
Each unit means indoor unit,outdoor unit,central remote controller,
and signal amplifier.

Total wiring length:maximum 2000m.
However,when wiring exceeds 500m in length,
a signal amplifier (option) is required.

Use the shielded wire specified and always ground(however,one side only).
If not,transmit-receive with a transmission line is not
only impossible normally,but malfunction may occur.

Use the shielded cable in accordance with standards
in the country.

Wiring length of a remote controller group shall be
within 500m.

Size

Maximum H07RN-F or

Minimum equivalent

Maximum H07RN-F or

Minimum equivalent

Maximum

8.0

6.0

2.5

1.5

1.25

Wire type Remarks

Shield cord

(LONWORKS

Minimum

Maximum Sheathed vinyl

Minimum cord cable

0.75

1.25

0.75

compatible part)

3 4 wire 50Hz

380-415V

1 2 wire 50Hz

220-240V

Non-polar

2-core

Polar 3-core

1

2

3

4

Fuse
capacity

per one outdoor unit

5

per one refrigerant system.

6

Model Field fuse

Outdoor
unit

Indoor
unit

40A

20A

5

6

– 12 –

Leakage breaker

40A 100mA 0.1sec or less

20A 40mA 0.1sec or less

1-3 ADDRESS SETTING

This system is needed to set the address for the indoor unit, outdoor
unit and remote controller and central remote controller.

(1) KINDS OF ADDRESS AND SETTING RANGE

UNIT SETTING

Outdoor
unit

Refrigerant
circuit address

Refrigerant
circuit address

Indoor
unit

Indoor unit address

Remote controller
address

SETTING

RANGE

0 99

0 99

0 15

0 15

TYPE OF SWITCH REMARKS

Setting
example

0

Setting
example

63

Setting
example
2

Setting
example

0

0

SW 9 SW 8

6

SW 8 SW 7

0

Show next page

3

2

SW 5

0

Remote controller
switch 1

Remote
controller

Number of indoor
unit connection

Remote controller
switch 2

Central

remote

Central remote
controller address

controller

INDOOR UNIT CONTROL METHOD

DSW1-4

OFF

ON

METHOD

Master
Slave

Allocate remote
by order from the

ON/OFF

ON/OFF

ON/OFF
combi­nation

0 15

REMARKS

control addresses

master unit

SW 9

DIP SW1-1

DIP SW1-2

DIP SW1-4

Initial setting

Terminator

Number of indoor unit

OFFON: 1 unit

: multiple unit

Shown below

– 13 –

Refrigerant circuit address conversion table

Outdoor unit

Rotary switch (SW 8)- - - Factory setting "0"

Rotary switch (SW 9)- - - Factory setting "0"

Indoor Unit

Rotary switch (SW 7)- - - Factory setting "0"
Rotary switch (SW 8)- - - Factory setting "0"

In case of multiple refrigerant system,set SW 8 and SW 9 Indoor unit SW7 and SW8 as shown
in the table for each refrigerant system.

Do not use a nonexistent switch setting combination.

Example : When SW 9 is set to "1" and SW 8 is set to "14" the refrigerant circuit address will be "30".

Refrigerant

circuit

address

0
1
2
3

4
5
6
7
8

9
10
11

12

13
14
15

16
17

18

19

Rotary

Switch setting

OUTDOOR UNIT

SW9

Refrigerant

circuit

address

SW8

INDOOR UNIT

SW7

SW8

0

0
1

0

2

0

3

0
0

4
5

0
0

6

0

7

0

8

0

9

0

10

0

11

0

12

0

13

0

14

0

15

0

1

1

1

2

1

3

1

20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36

37
38
39

Rotary
Switch setting
OUTDOOR UNIT

SW9

Refrigerant

circuit

address

SW8
INDOOR UNIT
SW8

SW7

4

1

5

1

6

1
1

7
8

1

9

1
1

10

1

11

1

12

1

13

1

14

1

15

0

2

1

2

2

2
2

3

2

4

2

5

2

6

2

7

40

41

42
43
44

45

46

47
48
49
50
51
52
53
54
55
56
57
58
59

Rotary
Switch setting
OUTDOOR UNIT

SW9

Refrigerant

circuit

address

SW8

INDOOR UNIT
SW8

SW7

2

8

2

9

2

10

2

11

2

12

2

13

2

14

2

15

3

0
1

3

2

3

3

3
3

4
5

3

6

3
3

7

3

8

3

9

10

3
3

11

60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79

Rotary

Switch setting
OUTDOOR UNIT

SW9

Refrigerant

circuit

address

SW8

INDOOR UNIT

SW7

SW8

3

12

3

13

3

14

3

15

0

4

1

4

2

4

3

4

4

4

5

4

6

4

7

4

8

4

9

4

10

4

11

4

12

4

13

4

14

4

15

4

90
91
92
93
94
95
96
97
98

99

80
81
82
83
84
85
86
87
88
89

Rotary
Switch setting
OUTDOOR UNIT

SW9

SW8

INDOOR UNIT

SW7

SW8

0

5

1

5

2

5

3

5

4

5

5

5

6

5

7

5

8

5

9

5

10

5

11

5

12

5

13

5

14

5
5

15

6

0

6

1
2

6

6

3

– 14 –

(2) SETTING EXAMPLE

Outdoor unit

9 8

Outdoor
unit

Indoor
unit

0

Wired remote
controller

Wireless remote
controller

Transmission line

(Non-polar 2 core)

8 7

5

0

9 8 7

5

1

9 8 7

5

2

9 8 7

9 8 7 5 9 8 7 5 9 8 7

5

3

4

0 0 0 0 0 00 1 0 0 0 1

5

2 (Max.16 Numbers)

9 8

63

8 7

63 0 163 0263 0363 1463 2563 0 63636 0

5

0

9 8 7

5

9 8 7

5

OFF ONDIP SW1-1
OFF ONDIP SW1-4

9 8 7

5

9 8 7

5

9 8 7

5

9 8 7

00

5

9 8 7

14

5

0 0

0 15 0

9 8 7

Central remote
controller

5

9

5

9

7

0

3

OFF ONDIP SW1-1
OFF ONDIP SW1-4

9 8

63

Refrigeration
circuit address
Rotary-sw9,8

Instructions for setting up the address

1 The refrigerant system address of the indoor and outdoor units can be set to optional numbers
in the range of 0 and 99.
2 Address of the indoor unit can be set to optional numbers in the range of 0 to 15.
3 Set address of the remote controller in the order of 0,1,2,...15.(Blank is impossible)
4 Address of the central remote controller can be set to optional numbers in the range of 0 to 15.

ONDIP SW1-1

Number of the unit

in the group

Refrigeration
circuit address
Rotary-sw8,7

DIP SW1-1 Remote controller address1
DIP SW1-2 Number of indoor unit connection
DIP SW1-4 Remote controller address2

00 01 02 03 04

Central Remote controller (Max.16)

Central remote controller address

5

8 7

63 0

9

6

Indoor unit address
Rotary-sw5

Remote controller address
Rotary-sw9

– 15 –

Refrigerant circuit address (Outdoor unit)
Refrigerant circuit address (Indoor unit)

Refrigerant circuit 1 Refrigerant circuit 2

1

00 01 02

1 1 10 1 2 2 2 20 1 2

Outdoor unit PCB (Address setting No.0

99) 99)

Setting by rotary SW8,9

2

00 01 02

Indoor unit PCB (Address setting No.0
Setting by rotary SW7,8

Indoor unit address

0

00 0 01 1 02 2 13 0 14 1 15 003

0 0 0 0 0 0 0

Indoor unit PCB (Address setting No. 0

15)

Setting by rotary SW5

Remote controller address
(Indoor unit)

0

00 0 01 1 02 2 0 03 3 0 04 0 0 05 0

0

Indoor unit PCB (Address setting No.0

0 0

15)

Setting by rotary SW9

– 16 –

Remote controller switch 1

[Master] [Slave]

OFF

ON

Remote controller unit PCB
Setting by DIP SW 1-1

No. indoor unit connection

ON OFF

ON

Remote controller PCB

124

Setting by DIP SW 1-2

– 17 –

Remote controller switch 2
(Remote controller)

[Master] [Slave]

Remote controller unit PCB
Setting by DIP SW 1-4

Central remote controller address

[Master] [Slave]

00

01

02

03

Central remote controller (Max.16)

Set central remote controller address first,to conduct the initial setting of it.

– 18 –

Outdoor

unit

3 4W 50Hz 380 - 415V

1 50Hz
220 - 240V

Transmission line

Indoor

unit

1

13

7 8

4

7

8

1

9

14 15 16

10 11

12

2

3 5 6

13

14

Central

remote controller

Wired

remote controller

RB unit

Before test running, check the following items.

Note: RB unit ( ) is for the heat recovery type.

Is the selection of the outdoor unit and the indoor unit correct?
(Maximum operating indoor unit, total capacity of the indoor unit)

Is the piping length correct?
(Ex. Maximum piping length : 100m)

Is the separate selected correct?
Doesn't gas leak?
Is the refrigerant flow correct?
Are the power supplies connected?

1

2

(Power supply for the indoor unit and outdoor unit is separated.)
Is the spec. for the power supply cable correct?
Is the RB unit cable connected?
Is the length of the transmission line under the limit?
Is the spec. for the transmission cable correct?
(non-polar 2-core, 0.75-1.25mm )
Is the transmission cable connected to all units?

2

Are the addresses set? (Ex. Refrigerant circuit address, indoor unit address, remote controller address, etc.)
Have the all settings done on the PCB?
Is the refrigerant valve opened?

Is the power supplied to crank case heater for 12 hours before winter operation?

3
4
5
6
7

8
9

10

Is the diameter of the pipe selected correct?

11

12
13
14
15

2-1 CHECK ITEMS BEFORE TEST RUNNING

9

2. TEST RUN

1 50Hz 220 - 240V

16

– 19 –

2-2 TEST RUNNING METHOD

Supply power to the crankcase heater for 12 hours prior to the start of operation in the winter.
The following is the procedure for the test operation.

2-2-1 OUTDOOR PC BOARD

If the test operation is to be done for cooling operation, set DIP switch (SW-1-1) to on. If the test operation is to be done for heating,
set DIP switch (SW1-2) to on.

2-2-2 TEST OPERATION USING REMOTE CONTROLLER

(1) Standard wired remote controller
For test running, when the remote controller FAN CONTROL
button and MASTER CONTROL button are pressed simulta-

neously for more than three seconds when the air conditioner is

not running, the air conditioner starts and TEST is displayed on
the remote controller display.
However, the SET TEMP./DAY setting button does not function,
but all other buttons, displays, and protection functions operate.

CLOCK

NON STOP

SET TIME

TIMER
MODE

CLOCK ADJUST

TEST

TEMP./DAY

C

CONTROL

FAN

COOL

MASTER

CONTROL

When EE : EE blinks at the current time display, there

DAY button ( ) are pressed

simultaneously for more than three seconds, the self

be displayed at the current time display. In addition,

lights, press the START/STOP button and after

CLOCK

NON STOP

SET TIME

TIMER

MODE

CLOCK ADJUST

TEMP./DAY

C

CONTROL

FAN

COOL

MASTER

CONTROL

operation lamp goes off, perform the same operation.

ZONE

ENERG

SET

D

is an error inside the air conditioner. If the SET TIME

diagnosis check will start and the error

the remote controller address will be displayed below.

TIMER
MODE

CLOCK ADJUST

SET TIME

TEMP./DAY

FAN

CONTROL

MASTER

CONTROL

OP

SET

button ( ) and SET TEMP.

contents will

When the oper

ation

lamp

Stop operation

ZONE

SET

START/STOP

ENERGY SAVE

DAY OFF

– 20 –

ZONE

SET

SET

START/STOP

ENERGY SAVE

DAY OFF

Error Code

Error contents

Error Code

Error contents

No error

Model information abnormal

Power supply frequency abnormal

EEPROM access error

EEPROM elimination error

Room temperature thermistor error

Indoor unit heat exchange thermistor

(middle) error

Indoor unit heat exchange thermistor

(inlet) error

Indoor unit heat exchange
(exit) error

thermistor

To stop test running, press the START/STOP button.
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 running.

(2) Standard wireless remote controller

Press the remote control unit test run button while the air condi­ tioner is running.

Blower temperature thermistor error

Drain abnormal

Room temperature abnormal

Indoor unit fan error

Communication error

Node setting error

Parallel communication error

Outdoor unit error

Remote control unit

At the end of test running, press the remote control unit start-

stop button.

Operation can be checked by lighting and flashing of the display
section OPERATION and TIMER lamps.
Perform judgment in accordance with the following.

Test running

When the air conditioner is run by pressing the remote control
unit test run button, the OPERATION and TIMER lamps flash
slowly at the same time.

START

STOP

A B C D

START/STOP button

TEST RUN button

– 21 –

– 22 –

1) When the test run signal is transmitted from the standard wired remote controller, the wireless remote controller
and the central remote controller.

(1) In the test running status, operated in accordance with the setting of each switch besides the room temperature

switch. The room temperature adjustment does not funtion, and then the electric expansion valve is controlled

with maximum flow.
(2) De-frosting and de-icing prevention 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, test run will be made in accordance with the operation

mode of the indoor unit , which belongs to the same refrigerant system.

(2) Test running initialization is shown below.

Air Flow Hi Hi

RoomTemperature Indication 18 30

Vertical Air Direction Panel

Horizontal Air Direction Panel

Swing

Operating Mode Cooling Heating

Initialized position Initialized position

Front Front

OFF

OFF

2-3 TEST RUN CONTROL

3.REFRIGERANT PIPE SYSTEM DIAGRAM

3-1 COOLING ONLY / HEAT PUMP TYPE

THOA

THHO THHM THHI

THOA

THHO THHM THHI

THOA

THHO THHM THHI

INDOOR UNIT A INDOOR UNIT B INDOOR UNIT C

EEV

EEV

EEV

HP:High pressure

MP:Middle pressure

LP:Low pressure

HP:High pressure

LP:Low pressure

:Oil sensor

:Dryer

:Pressure switch

THIATHIA THIA

:H.E. middle thermistor

:Outlet air thermistor

:H.E. outlet thermistor

:H.E. inlet thermistor

D

OA

HM

HO

Hi

BV1

SV2

BV2

4WV5

:Discharge thermistor
TH

:Heat exchanger

:Thermistor

:4-way valve

:Check valve

TH

:Expansion valve

:Strainer :Pressure sensor

:Power accumulation unit

:Solenoid valve

BV3

MP

TANK

RECEIVER

THs:Suction thermistor

TH

TH

TH

THR:Room temp thermistor

:Capillary tube

THo:Outdoor temp thermistor

THIA:Indoor Room temp thermistor

:Ball valve

OUTDOOR UNIT

SV3

EEV3

SV1

EEV1

SV7

LP

LP

CCUMU
A

LATEOR

THS

HP

THHO1

H.E.1

THHI1

COMP.1

COMP.2

COMP.3

SV4

THD1

THD2

OIL

SEPARATER

OIL

SEPARATER

THD3

SV6

SV5

4WV2

OIL

SEPARATER

4WV1

HP

SV8

THHO2

H.E.2

THHI2

4WV3

EEV2

THHO3

THO

H.E.3

THHI3

4WV4

– 23 –

3-2 HEAT RECOVERY TYPE

EEV

THIA

THOA

THHO THHM THHI

EEV

THOA

THIA

THHO THHM THHI

R.B UNIT

R.B UNIT

SVD

SVB2

SVB1

SVs

SVD

SVB2

SVB1

SVs

HP:High pressure

MP:Middle pressure

LP:Low pressure

:Pressure switch

:Strainer :Pressure sensor

:Power accumulation unit

:Heat exchanger

HP:High pressure

LP:Low pressure

:Oil sensor

:Dryer

:H.E. middle thermistor

:H.E. outlet thermistor

:H.E. inlet thermistor

:Discharge thermistor

D

Hi

HO

HM

TH

TH

TH

TH

:Thermistor

:Outlet air thermistor

OA

THs:Suction thermistor

TH

THo:Outdoor temp thermistor

THR:Room temp thermistor

THIA:Indoor Room temp thermistor

THOA

THHO THHM THHI

INDOOR UNIT A INDOOR UNIT B INDOOR UNIT C

EEV

:Solenoid valve

:4-way valve

:Check valve

:Expansion valve

:Capillary tube

:Ball valve

THIA

SVD

R.B UNIT

SVB2

SVB1

SVs

4WV5

H.E.1

BV3

MP

TANK

RECEIVER

EEV3

EEV1

SV8

THHO2

H.E.2

EEV2

THHO3

H.E.3

THO

SV2

SV1

BV2

SV7

HO1

T

HP

BV1

LP

LP

CCUMU
A

LATEOR

THS

OUTDOOR UNIT

SV3

THHI1

COMP.1

COMP.2

COMP.3

SV4

THD1

THD2

OIL

SEPARATER

OIL

SEPARATER

THD3

SV6

SV5

4WV2

OIL

SEPARATER

4WV1

HP

THHI2

4WV3

THHI3

4WV4

– 24 –

4. FUNCTION OF PRINTED CIRCUIT BOARD

4-1 PCB LAYOUTS

■

INDOOR UNIT CONTROL CIRCUIT BOARD

CN19 CN20 CN21

CN15

JM1-3

CN10

CN16

CN4

CN11

CN23

CN14

CN18

CN13 CN8

CN22

CN12

CN24

CN26

SW2

SW1

CN17

CN25

SW4

SW3

CN6

SW5

SW9SW7SW8

CN2

CN1

CN3

SW10

■

OUTDOOR UNIT CONTROL CIRCUIT BOARD

CN52

CN53

CN45

CN24

CN25

CN26

CN4

SW9 SW8

CN5

SW6SW7 SW5 SW4 SW3 SW2 SW1

CN27 CN3 4

CN51

CN2
CN22

CN44

CN28

LED4
LED5
LED6

EXT.

INPUT1

CN33

LED1
LED2

LED3

CN43 CN42

EXT.
INPUT2

CN32

CN48CN49CN50

CN35

CN29

CN30

CN31

CN1

CN3

CN21

CN20

CN19

CN18

CN17

CN14

CN12 CN10 CN8

CN13 CN11 CN9 CN7

– 25 –

CN5

CN6

4-2 MICROPROCESSOR BLOCK DIAGRAM

INDOOR UNIT

■

Power supply

ROOM THERMISTER(CN19)
PIPE INLET/IMEDIATE
/OUTLET THERMISTER(CN20)
OUTLET THERMISTER(CN21)

FAN FEEDBACK

DIP SW(SW1-4)

ROTARY SW(SW5,7,9)

FLOAT SW(CN15)

COMMUNICATION
PWB.(CN26)

(CN16)

TEST(CN18)

(CN24)

FILTER CIRCUIT

POWER DETECTION
CIRCUIT

TEMPERATURE
DETECTION CIRCUIT

FAN ROTATION
READ CIRCUIT

SWITCH
READ CIRCUIT

FLOAT SWITCH
INPUT CIRCUIT

TEST INPUT
CIRCUIT

EXTERNAL INPUT
CIRCUIT

COMMUNICATION
CIRCUIT

RECTIFICATION
SMOOTHING
CIRCUIT

MICROPROCESSOR

DC-DC CONVERTER
5V,12V,14V

ACTUATOR
DRIVE CIRCUIT

SP MOTOR
DRIVE CIRCUIT

INDICATOR
DISPLAY OUTPUT

EXTERNAL OUTPUT

AUXILIARY
HEATER OUTPUT

FAN MOTER(CN4)

DRAIN PUMP(CN5)
SV(CN6)

LOUVER(CN10,CN11)

EEV(CN14)

INDICATOR
DISPLAY(CN13)

(CN22)

AUXILIARY
HEATER(CN12)

(CN24)

Wired remote
controller(CN17)

(CN25)

EEPROM

FLASH WRITE
CIRCUIT

RESET CIRCUIT

OSCILLATOR
CIRCUIT

WIRED REMOTE
CONTROLLER
READ CIRCUIT

FLASH WRITE
CIRCUIT

RESET CIRCUIT

OSCILLATOR
CIRCUIT

COMMUNICATION

BUZZER OUTPUT

MICROPROCESSOR

– 26 –

OUTDOOR UNIT

■

Power supply

SUCTION/
OUTDOOR/
DISCHARGE
TEMP. 1-3(CN27)

PRESSURE
SENSOR(CN32-34)

DIP SW(SW1-7)
ROTARY SW(SW8,9)

TEST(CN35)

COMMUNICATION
PWB.(CN51)

(CN44)

FILTER CIRCUIT

POWER DETECTION
CIRCUIT

TEMPERATURE
DETECTION CIRCUIT

PRESSURE
DETECTION CIRCUIT

SWITCH
READ CIRCUIT

TEST INPUT
CIRCUIT

COMMUNICATION
CIRCUIT

EEPROM

FLASH WRITE
CIRCUIT

RECTIFICATION
SMOOTHING
CIRCUIT

MICROPROCESSOR

DC-DC CONVERTER
5V,12V,14V

ST MOTOR
DRIVE CIRCUIT

EEV (CN29-31)

WIRED REMOTE

CONTROLLER(CN17)

OIL SENSOR

SW(CN52,53)

PRESSURE

SW(CN49,50)

(CN49,50)

(CN28)

RESET CIRCUIT

OSCILLATOR
CIRCUIT

POWER DETECTION
CIRCUIT

TEMPERATURE
DETECTION CIRCUIT

OIL SENSOR
READ CIRCUIT

PRESSURE SWITCH
READ CIRCUIT

EXTERNAL
INPUT CIRCUIT

FLASH WRITE
CIRCUIT

RESET CIRCUIT

OSCILLATOR
CIRCUIT

COMMUNICATION

ACTUATOR
DRIVE CIRCUIT

LED OUTPUT

EXTERNAL OUTPUT

COMPRESSOR

(CN24-26)

FAN MOTOR(CN3,4)

4WYV(CN17-21)

SV(CN7-16)

BASE HEATER(CN5)

COMPRESSOR

(CN24-26)

LED(LED1-6)

(CN28)

MICROPROCESSOR

– 27 –

4-3 MICROPROCESSOR FUNCTION LIST

■ INDOOR UNIT

INDOOR UNIT TYPE

60,000
54,000
45,000
36,000
30,000

CAPACITY

(BTU/h)

24,000(25,000)
20,000
18,000
14,000
12,000
9,000
7,000

CN1 ACIN
CN2 TH FUSE
CN3 FAN CAPA
CN4 FAN MOTOR
CN5 DRAIN PUMP
CN6 S. VALVE
CN8 NETWORK
CN10 SP-M(U.D)
CN11 SP-M(R,L)
CN12

HEATER
CN13 DISPLAY
CN14 E.E.VALVE
CN15 FLOAT SW
CN16
CN17

FAN FEEDBACK

WIRED REMOTE

CONTROLLER
CN18 TEST
CN19 R.TH
CN20 P.TH
CN21 S.TH
CN22
CN23

EXT.OUTPUT

EXT.INPUT
CN24 FLASH(MAIN)
CN25 FLASH(SUB)
CN26 COMMUNICATE
SW1
SW2
SW3
SW4

SW5

SW6

SW7

SW8

SW9
SW10

FUNCTION 1

FUNCTION 2

FUNCTION 3

FUNCTION 4

INDOOR UNIT

ADDRESS 1

INDOOR UNIT

ADDRESS 2

REFRIGERANT

ADDRESS 1

REFRIGERANT

ADDRESS 2

REMOTE CONT-

ROLLER ADDRESS

MANUAL AUTO

Large

Ceiling

Universal

Compact
Cassette

Large

Cassette

Compact

Duct

Low

Duct

High

Static

Pressure

Duct

Static

Pressure

25 25

Wall

Mounted

– 28 –

■ OUTDOOR UNIT

OUTDOOR UNIT TYPE
CN1 AC IN
CN2 NET
CN3 FAN.1
CN4 FAN.2
CN5 BASE HEATER
CN6 CRANK CASE HEATER
CN7 S.V.1
CN8 S.V.2
CN9 S.V.3
CN10 S.V.4
CN11 S.V.5
CN12 S.V.6
CN13 S.V.7
CN14 S.V.8
CN17 4WV.1
CN18 4WV.2
CN19 4WV.3
CN20 4WV.4
CN21 4WV.5
CN22 TERMINATOR
CN24 COMP.1
CN25 COMP.2
CN26 COMP.3
CN27 TH.1
CN28 FLASH W/R S
CN29 E.E.V.1
CN30 E.E.V.2
CN31 E.E.V.3
CN32 P.SEN-L
CN33 P.SEN-M
CN34 P.SEN-H
CN35 TEST
CN42 P.SW-H
CN43 P.SW-L
CN44 FLASH W/R M
CN45 TH.2
CN48 EXT.OUTPUT
CN49 EXT.INPUT2
CN50 EXT.INPUT1
CN51 COMMUNICATION

PWB.
CN52 OIL LV-HI
CN53 OIL LV-LO
SW1
SW2
SW3
SW4
SW5
SW6
SW7

SW8

SW9

FUNCTION 1

FUNCTION 1

FUNCTION 1

FUNCTION 1

FUNCTION 1

FUNCTION 1

FUNCTION 1

REFRIGERANT

ADDRESS 1

REFRIGERANT

ADDRESS 2

AOY90TPAMF

– 29 –

4-4 FUNCTION AND SETTING OF EACH SWITCH

■ INDOOR UNIT

1. DIP SWITCH 1

1

Ceiling height setting.
Changeover the fan speed of the indoor fan phase control according to ceiling height (cassette type).
Details of rotation is according to DIP SW3 setting.

CEILING HEIGHT SETTING 1,2

Standard High ceiling 1 Low ceiling

SW1-1

SW1-2

(2)

NOTCH

Ceiling height

Room temp correct coefficient of heating.

2

Decide room temp correct coefficient value of heating.

ROOM TEMP. CORRECT COEFFICIENT OF HEATING

SW1-3

OFF

ON OFF - 2 deg

(3)

(4)

(5)

(6)

OFF

OFF OFF

HIGH(1)

MED

LOW LOW

S-LOW S-LOW S-LOW S-LOW

2.5 3.0m

SW1-4

OFF

ON

3.0 3.5m

Coefficient value

High ceiling 2

ON

HIGH HIGH

MED MED

+ 2 deg

0 degOFF

OFF

ON ON

LOW

more than

3.5m

ON

HIGH

MEDLOW

less than

2.5m

+ 4 degON ON

2. DIP SWITCH 2

Room temp. correct coefficient of cooling.

1

Decide room temp correct coefficient value of cooling.

ROOM TEMP CORRECT COEFFICIENT OF COOLING

SW2-1

OFF

ON + 2 deg

2

Zone control switch.
Decide the indoor unit for zone control use and not for zone control.

ZONE CONTROL SWITCH

SW2-2

OFF

ON

Coefficient value

0 deg

Switch control

Validity

Invalidity

Ð 12Ð

– 30 –