2WAY VRF SYSTEM
Test Run
6
- 11
1
2
3
4
5
6
7
8
9
5. Auto Address Setting
48
Case 2
In case of possibility of turning ON power to indoor/outdoor units for each refrigerant system:
In case of possibility of turning ON power to indoor/outdoor units for each refrigerant system:
Indoor unit address setting can be made without starting the compressor.
How to control auto address setting from outdoor unit
1. Set the unit number setting switch (SW5) on unit 1 (outdoor main unit) control P.C. board to:
2 3
1
ON
(Unit 1: This unit becomes to the outdoor main unit.)
Set the unit number setting switch (SW5) on unit 2 control P.C. board to:
3
2
1
ON
Set the unit number setting switch (SW5) on unit 3 control P.C. board to:
3
2
1
ON
2. Regarding the number of outdoor units, set the Dip switch (SW6) for setting the number of outdoor units on outdoor main unit
control P.C. board to 3 units.
1
2 3
ON
ON
OFF
3. Check that the refrigerant system address Rotary switch (SW1) on outdoor main unit control P.C. board in 1 refrigerant system is
set to “1” and the Dip switch (SW2) is set to “0” (at shipment).
1
2
ON
ON
OFF
4. Regarding the number of indoor units connected to the outdoor unit, set the Dip switch (SW4) for setting the number on indoor
units on outdoor main unit control P.C. board to “1”
2
3
1
ON
ON
OFF
and set the Rotary switch (SW3) to “3”.
Total of 13 units installation are made.
5. Turn ON power to all indoor and outdoor units in one refrigerant system.
6. Short circuit the A.ADD pin (CN30) of outdoor main unit for over 1 second long and then open circuit.
(Communication for auto address setting begins.)
* To cancel, again short circuit the A.ADD pin (CN30) for over 1 second long and then open circuit.
LEDs 1 and 2 that indicate auto address setting is in progress go out and that process is stopped.
Be sure to perform auto address setting again.
(Auto address setting is completed when the compressor stops and LEDs 1 and 2 on outdoor main unit control P.C. board go out.)
7. Turn ON power to indoor and outdoor units only for another refrigerant system and repeat steps 1 to 5 described above.
Complete auto address setting for each refrigerant system.
8. Remote control operation is now available.
* When performing auto address setting by the remote controller, perform auto address setting by the remote controller after
step 5.
Refer to section “Auto Address Setting from Remote Controller.”
F
inal check before operation
Final check must be done under the conditions of inter-outdoor unit control wiring
connected to the centralized control system and the resistor between conductors
must be measured by a Megger. Check if it is showing between 30
Ω
and 120
Ω
.
If the resistance value is out of range, check adjustment of the termination resistor again.
Even if it is out of range, the problem is caused by wiring.
• Is the wiring connection properly completed?
• Are there any scratches or deterioration on the coverage?
•
Measure between conductors and also between wiring and ground by 500V Megger
insulation resistance tester.
Make sure the Megger is showing more than 100M
Ω
.
When measuring, remove both ends of the wiring from the terminal board.
If not removed, it will be damaged.
If it is less than 100M
Ω
, a new wiring connection should be made.
Between conductors
Between wiring and ground
Wire
Wire
Wire
Wire
Ground
Ground
Make settings according to each case as described below.
• In case of possibility of tu
rning ON power to indoor/outdoor units for each refrigerant system
Case 2
• In case of impossibility of tu
rning ON power to indoor/outdoor units for each refrigerant system
Auto address setting in heating mode
Case 3.a
Auto address setting in cooling mode
Case 3.b
00_281396_EN.indd 48
2016-8-10 9:16:43
47
1-1
1-2
1-13
1-3
2
3
9
2
1
3
1
2 3
1
2 3
3
2
1
1 2 3
1
2
2
1
3
1
1
3
2
1 2
2
1
3
3
2
1
2-1
2-2
2-9
Setting of terminating resistance pin (CN67)
Refrigerant circuit No. 1
Unit No. 1 (Main) : short-circuit (at shipment)
Unit No. 2 (Sub) : short-circuit (at shipment)
Unit No. 3 (Sub) : short-circuit (at shipment)
Refrigerant circuit No. 2 to z-1
Unit No. 1 (Main) : open-circuit
Unit No. 2 (Sub) : short-circuit (at shipment)
Refrigerant circuit No. z
Unit No. 1 (Main) : short-circuit (at shipment)
Unit No. 2 (Sub) : short-circuit (at shipment)
Example: Basic Wiring Diagram (2)
•
Case of link wiring
No. 1 refrigerant system
No. 2 refrigerant system
No. z refrigerant system
* See the section “ATTENTION!”.
Unit 1 setting (outdoor main unit)
System address
(System 1 setting)
No. of indoor units
(13 units setting)
Unit 2 setting
Unit 3 setting
Unit 3
(Sub)
Unit 2
(Sub)
Unit 1
(Main)
(SW1) (SW2)
(SW3)
(SW4)
(SW6)
(SW5)
(SW5)
(SW5)
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
Number of
outdoor units
(3 units setting)
Unit
number
setting
(unit 1)
Unit
number
setting
(unit 2)
Set the terminating
resistance pin to
SHORT side. (CN67)
Unit
number
setting
(unit 3)
Inter-outdoor unit
control wiring
Inter-outdoor unit
control wiring
Remote control
communication wiring
Outdoor unit
system 1
Inter-unit
control wiring
Inter-unit
control wiring
Remote
Controller
Indoor unit
Inter-unit control wiring
Central Controller
Unit 1 setting (outdoor main unit)
System address
(System 2 setting)
Number of indoor units
(9 units setting)
(SW1) (SW2)
(SW3)
(SW4)
(SW6)
(SW5)
ON
ON
ON
ON
ON
ON
ON
ON
OFF
OFF
OFF
OFF
Number of
outdoor units
(2 units setting)
Unit
number
setting
(unit 1)
Unit 2 setting
(SW5)
ON
ON
OFF
Unit
number
setting
(unit 2)
Unit 2
(Sub)
Unit 2
(Sub)
Unit 1
(Main)
Unit 1
(Main)
Set the terminating
resistance pin to
OPEN side. (CN67)
Set the terminating
resistance pin to
SHORT side. (CN67)
Outdoor unit
system 2
Outdoor unit
system z
Inter-outdoor unit control wiring
Inter-outdoor unit control wiring
To z refrigerant system indoor unit
Inter-unit control wiring
Inter-unit control wiring
Remote control
communication wiring
Remote
Controller
Indoor unit
00_281396_EN.indd 47
2016-8-10 9:16:42
SM830237-07_北米向け2WAY_VRF.indb 11
18/06/18 18:50:46
