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1-1

3-1. Auto Address Setting ...................................................................................................... 1-5

3-2. Automatic Address Setting from the Remote Controller ............................................... 1-10

3-3. Display during automatic address setting ..................................................................... 1-11

3-4. Request concerning recording the indoor/outdoor unit combination Nos. .................... 1-12

3-5. Checking the indoor unit addresses ............................................................................. 1-12

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1-2

1.
2.

Turn the remote power switch on at least 5 hours before the test, in order to energize the crankcase heater.
Turn the outdoor service valves (2 locations) to the full-open positions.

Use caution when making the settings. 
If there are duplicated system addresses, or if the settings for the Nos. of the indoor units are not consistent, an alarm will occur 
and the system will not start. 
These settings are not made on the indoor unit PCB.

Recheck the items to check before the test run.

Set the No. of indoor units.

Are the inter-unit control wires 

connected to more than 1 refrigerant 

system?

Set the system address.

When multiple outdoor units exist, disconnect the terminals extended 
from the shorted plugs (CN-TERMINAL) at all outdoor main unit PCBs 
except for 1. Alternatively, move the sockets to the OPEN side. 

<Outdoor unit control PCB> 

No. of  I/U setting switch

(S004)

(Check the link wiring.)

<Outdoor unit control PCB> 

R. C. ADD setting switch

(S002 and S003)

NO

YES

YES

NO

NO

YES

CASE 1

CASE 2

Refer to 
page 1-3.

Is it possible to turn ON the 

power only for the 1 refrigerant system where the 

test run will be performed?

Will automatic address setting be 

performed in Heating mode?

CASE 3B

CASE 3A

Turn ON the indoor and 

outdoor unit power for that 

refrigerant system only.

Short-circuit the automatic address pin 
(CN-A.ADD) on the outdoor unit PCB 
for 1 second or longer, then release it.

LED 1 and 2 blink alternately 
(about 2 or 3 minutes).

Are LEDs 1 and 2 on the 

outdoor unit PCB OFF?

Refer to “Table of 
Self-Diagnostic Functions and 
Description of Alarm Displays.”

YES

NO

Turn OFF the indoor and 

outdoor unit power.

Make necessary 

corrections.

Check the alarm contents.

Make necessary 
corrections

Turn OFF the 
indoor and 
outdoor unit 

Check the alarm

contents.

Is it OK to start the compressors?

Turn ON the indoor and 

outdoor unit power.

Short-circuit the cooling side of the 
mode change 3P pin (CN-MODE) 
on the outdoor main unit PCB. 
At the same time, short-circuit the 
automatic address pin (CN-A.ADD) 
for 1 second or longer, then pull it 
out. 

Start indoor and outdoor unit 
cooling operation. 
LED 1 and 2 blink alternately.

Start indoor and outdoor unit 
heating operation. 
LED 1 and 2 blink alternately.

Short-circuit the automatic 
address pin (CN-A.ADD) on the 
outdoor unit PCB for 1 second 
or longer, then release it.

Turn ON the indoor and 

outdoor unit power.

Is it OK to start the 

compressors?

*2

*2

3

*

3

*

Are LEDs 1 and 2 on the 

outdoor unit PCB OFF?

YES

NO

Check that test run preparation is OK. 
(Do not allow the short-circuited pins to remain short-circuited.)

NO

YES

Set the wired remote controller for test run.

Refer to the remote 
controller test-run 
settings.

Return remote control to normal mode

Check and make corrections according to “Table of Self-Diagnostic Functions.”

Does system operate?

End test run.

*1  Use a flathead screwdriver to short-circuit the pin on the PC board.

*2  A minimum of 5 hours must have passed after the power was turned ON 

to the outdoor unit.

Refer to Section 2 “1. Remote Controller Test Run Settings”.

Refer to Section 5. Self-Diagnostics Function Table.

*3  All indoor units operate in all refrigerant systems where the power is ON.

*1

*1

*1

*5

*5

*4

*4

*4

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D303 (LED2)

D302 (LED1)

TERMINAL

TERMINAL

D303 (LED2)

D302 (LED1)

A.ADD

MODE

A.ADD

MODE

S003

JP001

S002

S004

CN-OPT1

CN-OPT2

EMG plug (CN-EMG)

SILENT 
(CN-SILENT)

TEST

AP

RUN

STOP

LED for EEPROM 

memory IC (D330)

POWER LED 

(D514)

High-pressure 

sensor (CN-HPS)

Outdoor air 

temp (CN-TO)

Comp discharge

temp (CN-TD)

RC plug 
(CN-RC)

Liquid temp

(CN-C1)

Suction temp (CN-TS)

High-pressure switch 
plug (CN-63PH)

OC plug (CN-OC)

MOV plug (CN-MOV1)

EEPROM memory 

IC (IC18)

CHK

S003

JP001

CN-PRY2

CN-PRY1

S002

S004

TEST

AP

RUN

STOP

CHK

CN-OPT1

CN-OPT2

EMG plug 
(CN-EMG)

SILENT 
(CN-SILENT)

LED for EEPROM 
memory IC (D330)

POWER LED (D514)

High-pressure 

sensor (CN-HPS)

Outdoor air 

temp (CN-TO)

Comp discharge

temp (CN-TD)

RC plug (CN-RC)

Liquid temp (CN-C1)

Suction temp (CN-TS)

High-pressure switch 
plug (CN-63PH)

OC plug (CN-OC)

MOV plug (CN-MOV1)

EEPROM memory IC 
(IC18)

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MODE (3P) 

Changes the operating mode (heating/cooling). (Can be used only at the main unit.)
During normal operation: Short-circuiting these pins once will change all indoor units in that 
system to either cooling mode or heating mode.
During automatic address setting: When the pins are not connected, the mode is heating mode.

A. ADD (2P) 

Short-circuited for 1 second or longer  → Automatic address setting begins when the pins are  
released. Short-circuiting these pins for 1 second or longer while automatic address setting is in 
progress interrupts automatic address setting.

CHK (2P) 

When these pins are short-circuited, the mode is test run mode. (Test run mode is automatically 
canceled after 1 hour.) When the pins are released, test run mode is canceled.

RC (3P, blue) 
(CN-RC)

The outdoor unit maintenance remote controller can be connected here to check the alarm 
details.

RUN (2P) 

Short-circuit these pins and apply a pulse signal to start all indoor units in that system.

STOP (2P) 

Short-circuit these pins and apply a pulse signal to stop all indoor units in that system.
(If the pins are left short-circuited, it will not be possible to start operation from the indoor unit 
remote controllers.)

AP (2P) 

Socket for silent 
mode 
2P plug (White) 
(CN-SILENT)

These pins are used when applying vacuum to the outdoor unit.

1 unit (factory setting)

 set to 1

2 units

 set to 2

9 units

 set to 9

System 1 (factory setting)

Both OFF

ON

1

2

ON

OFF

 set to 1

System 11

1 ON

ON

1

2

ON

OFF

 set to 1

System 21

2 ON

ON

1

2

ON

OFF

 set to 1

System 30

1 & 2 ON

ON

1

2

ON

OFF

 set to 0

Used for installing the external timer for the silent mode.
(Refer to Section 1-14. Servicing and Maintenance Functions in Service Manual.)

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