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DEF
SW 3
SW 4
AP
CHK
A. ADD
LED 1
LED 2
● Name and Function of Each Switch on Outdoor Unit Control P.C. Board
Function Switch
MODE pin (3P, BLK)
A.ADD pin (2P, BLK)
CHK pin (2P, BLK)
RC plug (3P, BLU)
RUN pin (2P, BLK)
STOP pin (2P, BLK)
DEF pin (2P, BLK)
AP pin (2P, BLK)
SILENT plug (2P, WHT)
For details, refer to the Test Run Service Manual.
U
Changes to cooling/heating mode.
When in normal operation: When short circuited the COOL side, indoor unit operation in the same
When in auto address setting: Changes to heating mode with open-circuit.
Short circuited for over 1 second long
If short circuit lasts for over 1 second long during auto address setting, the setting is interrupted.
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.
Connects to outdoor unit maintenance remote controller and content of alarm message will be checked.
When short circuited and pulse signal is given, all indoor units operate in the same refrigerant system.
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.)
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.
Can be used when vacuuming the outdoor unit.
Can be used when setting the outdoor unit fan in sound absorbing mode.
Remarks
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.
Auto address setting starts with open-circuit.
46
SW 1
SW 2
STOP
MODE
CN-SILENT
RUN
CN-RC
CN-TERMINAL
CN-ROM
CN-OC
CN-EMG
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