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AP

STOP

RUN

Power LED
(D514)

LED 1 (D302)
LED 2 (D303)

MODE

TEST

CHK

LED (red × 2)

LED 1 and 2 blink alternately while automatic address setting is in progress.
Display the alarm contents for alarms that are detected by the outdoor unit.

LED (green): Power indicator

Indicates the DC 5V power on the outdoor unit control PCB.

2P plug : Start pin

Short-circuit this pin and apply a pulse signal to start all indoor units in that 
refrigerant system.

Short-circuit this pin and apply a pulse signal to stop all indoor units in that 
refrigerant system.

2P plug : Vacuuming pin

To perform vacuuming of the outdoor unit, short-circuit this pin and then turn
the power ON. All solenoid valves turn ON and vacuuming begins smoothly. 
(Do not perform automatic address setting at this time.)
Release the short-circuit to return the unit to normal status.

3P plug : Indoor unit Heating/Cooling mode change pin

When operating the compressors to perform automatic address setting,
operation in Heating mode can be normally used. However, short-circuiting this
pin performs operation in Cooling mode. (Static signal)

Short-circuiting this pin during ordinary operation changes the mode from 
Cooling to Heating (if the current mode is Cooling) or from Heating to Cooling
(if the current mode is Heating).

2P plug 

2P plug (black)

This pin is used to test the PCB at the factory.

Short-circuit during the test run operation. 
Open the circuit after the test run.

When the power is turned ON after this pin has been short-circuited, all output
signals will be output  in sequence. (Sequential output does not occur if this pin
is short-circuited when the power is already ON.) Releasing this pin returns the 
unit to normal control.

2P plug : Stop pin

SILENT

2P plug (White) : Socket for silent mode

CN-OPTION 1, 2

Plug for Demand Terminal (optional CZ-CAPDC3)

Used for installing the external timer for the silent mode.
(Refer to the section 1-14. Servicing and Maintenance Functions in service manual.)

(CN-SILENT)

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1

OFF

OFF

1
2
3
4
5
6
7
8
9

10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30

1
2
3
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5
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0
1
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5
6
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9
0
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8
9
0

OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF

ON
ON
ON
ON
ON
ON
ON
ON
ON
ON

OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF

ON

OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF

ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON

1
2
3

9

10

11

12
13
14

1
2
3

9

A
B

C
D

E

F

5

1

0

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Causes and corrections in instances when automatic address setting cannot be started.

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Causes and corrections in instances when automatic address setting starts, but cannot be completed successfully.

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If alarm E15, E16, or E20 appears after automatic address setting is started, check the following items.

The power LED on the outdoor unit control PCB does not turn ON.

LED 1 and 2 on the outdoor unit control PCB do not turn OFF when 
the outdoor unit power is turned ON, and automatic address setting 
cannot be started.

Check for any errors in the power wiring to 
the outdoor unit, and check for a missing 
phase.

Check the "Alarm Displays" table and 
correct the problem.

Check that the remote controller wiring 
and the inter-unit control wiring are 
connected correctly.
Check that the indoor unit power is ON.

An alarm appears on the remote controller sometime from several 
seconds to several minutes after automatic address setting is started.

LED 1 and 2 on the outdoor unit control PCB indicate that automatic 
address setting is in progress (the LEDs blink alternately) for several 
minutes after automatic address setting is started (the compressors 
may also start and stop several times), however LED 1 and 2 never 
indicate that automatic address setting is completed (turn OFF).

Check the "Alarm Displays" table and 
correct the problem.

Check the alarm details on the "Outdoor 
Unit Control PCB LED 1 and 2 Alarms" 
table, then check the "Alarm Displays" 
table and correct the problem.

E15

E16

E20

The number of indoor units detected during automatic address setting was smaller than the 
number of indoor units which was set with switch S004 on the outdoor unit PCB.

The number of indoor units detected during automatic address setting was larger than the 
number of indoor units which was set with switch S004 on the outdoor unit PCB.

The outdoor unit received no serial signals from indoor units within 90 seconds after automatic 
address setting was started.

An alarm appears immediately when automatic address setting is 
started from the remote controller.

Nothing happens when the operator attempts to start automatic 
address setting from the remote controller.

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5

1

E

6

1

E

0

2

E

Check that the indoor unit power is turned ON.

Check that the inter-unit control wiring is connected correctly. (Check that there are no open 
circuits, short circuits, terminal plugs, incorrect wiring to the remote controller terminals, or 
similar problems.)

Check that the remote controller wiring is connected correctly. (Check that there are no open 
circuits, short circuits, incorrect wiring to the inter-unit control wiring terminals, control wiring 
for group control, or similar problems.)

Check that the number of indoor units has been set correctly using switch S004 on the 
outdoor unit control PCB.

Check that the amount of additional refrigerant charge is correct (if automatic address setting 
is performed with the compressors ON).

Check that the refrigerant tubing connections are correct (if automatic address setting is 
performed with the compressors ON).

Check that there are no problems with indoor unit sensors E1 and E3 (if automatic address 
setting is performed with the compressors ON).

Check that there are no indoor units where the system address was already incorrectly set 
by manual or automatic address setting.

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• If one of the below alarms appears when the remote controller is operated after automatic address setting was 

completed (LED 1 and 2 on the outdoor unit control PCB are turned OFF), follow the instructions in the table 
below and correct the problem location.

E01

E02

E09

Nothing is 
displayed.

The remote controller is not connected correctly (remote controller receiving trouble).
The remote controller of an indoor unit where the indoor unit address is not set is inadvertently 
operated. (Communications with the outdoor unit are not possible.)

The remote controller is not connected correctly (trouble with sending of the signal from the 
remote controller to the indoor unit).

The indoor unit ceiling panel connector is not connected correctly.

Even if alarm E15 or E16 appears, addresses are set at those indoor units which could be verified. The set
addresses can be checked using the remote controller.

In the case of indoor unit group control, if there is a mistake in the remote controller inter-unit control wiring for 
group control, addresses may not be set even if                (SETTING) appears.

When automatic address setting is started from the outdoor unit control PCB or from the remote controller,
                (SETTING) appears on the remote controller at units where the inter-unit control wiring and remote con-
troller wiring are connected correctly. LED 1 and 2 on the outdoor unit control PCB blink alternately.

The remote controller is not connected correctly (power trouble).
The indoor unit power was cut off after automatic address setting was completed.

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