25
ENGLISH
45
1-1
1-2
1-13
1-3
2-1
2-2
2
-9
ON
(SW2)
(SW1)
OFF
ON
(SW4)
(SW3)
OFF
1
2
1
ON
3
2
1
ON
ON
(SW2)
(SW1)
OFF
ON
(SW4)
(SW3)
OFF
2
1
ON
2
2
1
ON
9
Setting of terminal pin (CN-TERMINAL)
Refrigerant circuit No. 1
Unit No. 1 (Main)
: short-circuit (at shipment)
Refrigerant circuit No. 2 to Z-1
Unit No. 1 (Main)
: open-circuit
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)
Number of indoor units
(13 units setting)
Unit 1
(Main)
Set the terminating resistance pin to SHORT side. (CN-TERMINAL)
Remote control communication wiring
Outdoor unit
system 1
Inter-unit
control wiring
Inter-unit
control wiring
(2WAY VRF)
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)
Unit 2
(Sub)
Unit 1
(Main)
Unit 1
(Main)
Set the terminating resistance pin to OPEN side. (CN-TERMINAL)
Set the terminating resistance pin to SHORT side. (CN-TERMINAL)
Outdoor unit
system 2
Outdoor unit
system Z
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
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46
●
Final 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
ȍ
and 120
ȍ
.
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
ȍ
.
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
ȍ
, a new wiring connection should be made.
Between conductors
Between wiring and ground
Wire
Wire
Wire
Wire
Ground
Ground
Case 2
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.
Check that the refrigerant system address Rotary switch (SW2) on outdoor main unit control P.C. board in 1 refrigerant syste
m is set to
“1” and the Dip switch (SW1) is set to “0” (at shipment).
2
1
ON
ON
OFF
2.
Regarding the number of indoor units connected to the outdoor unit, set the Dip switch (SW3) for setting the number of indoo
r units on
outdoor main unit control P.C. board to “1”
2
1
ON
ON
OFF
and set the Rotary switch (SW4) to “3”.
Total of 13 units installation are made.
3.
Turn ON power to all indoor and outdoor units in one refrigerant system.
4.
Short circuit the A.ADD pin 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 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.
5.
Turn ON power to indoor and outdoor units only for another refrigerant system and repeat steps 1 to 3 described above. Compl
ete auto
address setting for each refrigerant system.
6.
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
3.
●
See the section “Auto
Address Setting from Remote Controller”.
●
Make settings according to each case as described below
.
• In case of possibility of turning ON power to indoor/outdoor units for each refrigerant system
Case 2
• In case of impossibility of turning 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
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00̲280434̲Mini̲VRF̲Mentsuke.indb 25
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2016/06/16 11:37:45
