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Mini VRF SYSTEM
PCB Settings
4
1. Outdoor Unit Control PCB
4-5
HIC PCB (HIC-6LE1E8)
U
P
PIN1
(VDC+)
PIN2
(VDC-)
V
W
NU
4WAY Valve
(CN-20S)
Crankcase
heater
(CN-CH)
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Mini VRF SYSTEM
PCB Settings
4
1. Outdoor Unit Control PCB
4-6
1-3. Functions of Outdoor Unit PCB
CN-A. ADD
2P plug : Automatic address setting pin
Short-circuit this pin for 1 second or longer to automatically set the addresses at
the indoor units that are connected to that outdoor unit and are within the same
system.
the indoor units that are connected to that outdoor unit and are within the same
system.
The system address is “1” at the time of shipment. Automatic address setting is
necessary even for communications lines in a single system where the inter-unit
control wiring does not cross to any other systems.
necessary even for communications lines in a single system where the inter-unit
control wiring does not cross to any other systems.
While automatic address setting is in progress, the 2 LEDs (LED1, 2: red) on the
outdoor unit control PCB blink alternately. (Short-circuiting this pin while automatic
address setting is in progress will stop the automatic address setting operation.)
outdoor unit control PCB blink alternately. (Short-circuiting this pin while automatic
address setting is in progress will stop the automatic address setting operation.)
•
•
•
S002
Rotary switch (10 positions, yellow): Outdoor system address setting switch
The setting is “1” at the time of shipment. It is not necessary to change the setting
if wiring is connected only to an outdoor unit and indoor units in a single system
and the inter-unit control wiring does not cross multiple systems.
if wiring is connected only to an outdoor unit and indoor units in a single system
and the inter-unit control wiring does not cross multiple systems.
If wiring links the inter-unit control wiring for multiple systems to the same
communications lines, then a different address must be set for each refrigerant
tubing system.
communications lines, then a different address must be set for each refrigerant
tubing system.
If wiring links multiple systems, a maximum of 30 systems (up to 64 indoor units)
can be connected. This setting can be set up to “39,” however control will be for 30
systems even if the setting is set to higher than 30. An alarm will be displayed if
system addresses are duplicated. (For details, refer to Table 4-1.)
can be connected. This setting can be set up to “39,” however control will be for 30
systems even if the setting is set to higher than 30. An alarm will be displayed if
system addresses are duplicated. (For details, refer to Table 4-1.)
•
•
•
S003
DIP switch (2P): Switches for setting system address 10s digit and 20s digit
If 10 systems or more are set, the setting is made by a combination of this DIP
switch and S002.
switch and S002.
If 10 – 19 systems are set, set switch 1 (10s digit) to ON.
If 20 – 29 systems are set, set switch 2 (20s digit) to ON, and set switch 1 (10s
digit) to OFF.
digit) to OFF.
If 30 systems are set, set both switch 1 (10s digit) and switch 2 (20s digit) to ON.
(For details concerning S002 and S003, refer to Table 4-1.)
(For details concerning S002 and S003, refer to Table 4-1.)
•
•
•
•
S004
Rotary switch (16 positions, Red): Switch for setting the number of connected indoor
units. In order to allow the outdoor unit to manage indoor units in the same refrigerant
system, set the number of connected indoor units. (For details, refer to Table 4-2.)
units. In order to allow the outdoor unit to manage indoor units in the same refrigerant
system, set the number of connected indoor units. (For details, refer to Table 4-2.)
JP001
Jumper wire
TERMINAL
3P plug : For communications circuit impedance matching
A connecting socket (3P, black) is attached to the terminal plug at the time of
shipment from the factory.
shipment from the factory.
In the case of link wiring which combines the inter-unit control wiring for multiple
systems into a single communications circuit, leave the connecting socket in place
at only one of the outdoor units, and move the socket from the “SHORT” side to
the “OPEN” side at all other outdoor units. If multiple connecting sockets are left in
place, communications trouble will occur.
systems into a single communications circuit, leave the connecting socket in place
at only one of the outdoor units, and move the socket from the “SHORT” side to
the “OPEN” side at all other outdoor units. If multiple connecting sockets are left in
place, communications trouble will occur.
•
•
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Mini VRF SYSTEM
PCB Settings
4
1. Outdoor Unit Control PCB
4-7
LED1, 2
(D302, D303)
(D302, D303)
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.
•
•
Power LED
(D514)
(D514)
LED (green): Power indicator
Indicates the DC 5V power on the outdoor unit control PCB.
Indicates the DC 5V power on the outdoor unit control PCB.
RUN
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 start all indoor units in that refrigerant
system.
STOP
2P plug : Stop pin
Short-circuit this pin and apply a pulse signal to stop 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.
CHK
2P plug (black)
Short-circuit during the test run operation.
Open the circuit after the test run.
Short-circuit during the test run operation.
Open the circuit after the test run.
SILENT
(CN-SILENT)
(CN-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.)
(Refer to the section 1-14. Servicing and Maintenance Functions in service manual.)
AP
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.)
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.
•
•
MODE
2P 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)
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).
to Heating (if the current mode is Cooling) or from Heating to Cooling (if the
current mode is Heating).
•
•
TEST
2P plug
This pin is used to test the PCB at the factory.
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.
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.
•
•
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Mini VRF SYSTEM
PCB Settings
4
1. Outdoor Unit Control PCB
4-8
Table 4-1. Setting the System Address [S002: Rotary switch (yellow), S003: 2P DIP (black)]
Outdoor system
address No.
S002 setting (system
address switch)
S003 setting
1P (10s digit)
2P (20s digit)
1 refrigerant
system only
1
0
OFF
OFF
Link wiring
1
1
OFF
OFF
2
2
OFF
OFF
3
3
OFF
OFF
4
4
OFF
OFF
5
5
OFF
OFF
6
6
OFF
OFF
7
7
OFF
OFF
8
8
OFF
OFF
9
9
OFF
OFF
10
0
ON
OFF
11
1
ON
OFF
12
2
ON
OFF
13
3
ON
OFF
14
4
ON
OFF
15
5
ON
OFF
16
6
ON
OFF
17
7
ON
OFF
18
8
ON
OFF
19
9
ON
OFF
20
0
OFF
ON
21
1
OFF
ON
22
2
OFF
ON
23
3
OFF
ON
24
4
OFF
ON
25
5
OFF
ON
26
6
OFF
ON
27
7
OFF
ON
28
8
OFF
ON
29
9
OFF
ON
30
0
ON
ON
Table 4-2. Setting the Number of Indoor Units [S004: Rotary switch (gray)]
Number of
Indoor Units
S004 Setting
1
1
2
2
3
3
9
9
10
A
11
B
12
C
13
D
14
E
15
F
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