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Name and Function of Each Switch on Outdoor Unit Control P.C. Board
Function Switch
Remarks
MODE pin (3P, BLK)
Changes to cooling/heating mode. (outdoor main unit is only usable.)
When in normal operation:
When short circuited the COOL side, indoor unit operation in the same
refrigerant system changes to all cooling mode.
When short circuited the HEAT side, indoor unit operation in the same
refrigerant system changes to all heating mode.
When in auto address setting: Changes to heating mode with open-circuit.
A.ADD pin (2P, BLK)
Short circuited for over 1 second long
Auto address setting starts with open-circuit.
If short circuit lasts for over 1 second long during auto address setting, the setting is interrupted.
CHK pin (2P, BLK)
When short circuited, test run begins.
(If the remote controller is connected in test run mode, it is automatically cancelled after 1 hour.)
Also, if short-circuit is cancelled, test run mode is cancelled.
RC plug (3P, BLU)
Connects to outdoor unit maintenance remote controller and content of alarm message will be checked.
RUN pin (2P, BLK)
When short circuited and pulse signal is given, all indoor units operate in the same refrigerant system.
STOP pin (2P, BLK)
When short circuited and pulse signal is given, all indoor units stop in the same refrigerant system.
(When short circuited, operation cannot be performed by the indoor unit's remote controller.)
DEF pin (2P, BLK)
When the pin of the main unit is short-circuit in heating mode, defrosting operation is started.
Even if short circuited, defrosting will not be activated immediately.
AP pin (2P, BLK)
Can be used when vacuuming the outdoor unit.
SILENT plug (2P, WHT)
Can be used when setting the outdoor unit fan in sound absorbing mode.
For details, refer to the Test Run Service Manual.
LED 2
LED 1
SW 2
SW 1
SW 4
SW 3
DEF
A. ADD
CHK
AP
STOP
RUN
MODE
CN-SILENT
CN-ROM
CN-OC
CN-EMG
CN-RC
CN-TERMINAL
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44
Case 1
Auto
Address Control from Outdoor Unit
1.
Check the refrigerant system's
Address Setting Rotary switch (SW2) on outdoor main unit control P
.C. board to “1” and the Di
p switch
(SW1) to “0” (at shipment).
2
1
ON
ON
OFF
2.
Regarding the setting of the number of indoor units connected to the outdoor unit, set the Dip switch (SW3) for setting the
number of
indoor units on outdoor main unit control P
.C. board connected to the outdoor unit to “1”.
2
1
ON
ON
OFF
If the Rotary switch (SW4) set to “0”, 10 units can be prepared for operation.
3.
T
urn on power to indoor and outdoor units.
4.
Short circuit the
A.ADD pin on outdoor main unit control P
.C. board for over 1 second long and open circuit.
Communication for auto address setting begins.
*
To cancel, short circuit the A.ADD pin again for over 1 second long and then open circuit. The LED that indicates auto
address setting goes out and the process is stopped.
Be sure to perform auto address setting again.
Auto address setting is completed when LEDs 1 and 2 on outdoor main unit control P.C. board go out.
5.
Remote control operation is now available.
*
When auto address setting is controlled by the remote controller
, perform auto address setting by the remote controller after s
tep 3
described above.
7-4. Auto
Address
Setting
Example: Basic Wiring Diagram (1)
•
Case of no link wiring
(Inter-unit control wiring is not connected to a multiple system.)
Indoor unit address setting is possible without starting the compressor.
1-1
1-2
1-3
1-10
2
1
ON
ON
(SW2)
(SW1)
OFF
ON
(SW4)
(SW3)
OFF
2
1
ON
Unit 1 setting (outdoor main unit)
3P terminating
resistance pin
(SHORT side)
Number of indoor units
(10 units setting)
System address
(System 1 setting)
Remote control communication wiring
Inter-unit control wiring
Outdoor Unit
Indoor unit
Remote controller
Set the terminating resistance pin to SHORT side. (CN-TERMINAL)
Unit 1
(Main)
OPEN
SHORT
*
It is not necessary to control the terminating
resistance pin (3P) (CN-TERMINAL) on the
outdoor unit P.C. board.
3P pin is plugged in SHORT side at shipment.
Con
¿
rm it is plugged in SHORT side.
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00̲280434̲Mini̲VRF̲Mentsuke.indb 24
00̲280434̲Mini̲VRF̲Mentsuke.indb 24
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2016/06/16 11:37:45
