Mini VRF SYSTEM
Address Settings
1
2. Settings of Outdoor Unit Control PCB
1-4
<General Explanation of the Switches on the Outdoor Unit Control PCB>
MODE (3P)
Changes the operating mode (heating/cooling). (Can be used only at the main unit.)
During normal operation: Short-circuiting these pins once will change all indoor units in that
system to either cooling mode or heating mode.
During automatic address setting: When the pins are not connected, the mode is heating mode.
A. ADD (2P)
Short-circuited for 1 second or longer → Automatic address setting begins when the pins are
released. Short-circuiting these pins for 1 second or longer while automatic address setting is in
progress interrupts automatic address setting.
CHK (2P)
When these pins are short-circuited, the mode is test run mode. (Test run mode is automatically
canceled after 1 hour.) When the pins are released, test run mode is canceled.
RC (3P, blue)
(CN-RC)
The outdoor unit maintenance remote controller can be connected here to check the alarm
details.
RUN (2P)
Short-circuit these pins and apply a pulse signal to start all indoor units in that system.
STOP (2P)
Short-circuit these pins and apply a pulse signal to stop all indoor units in that system.
(If the pins are left short-circuited, it will not be possible to start operation from the indoor unit
remote controllers.)
AP (2P)
Socket for silent
mode
2P plug (White)
(CN-SILENT)
These pins are used when applying vacuum to the outdoor unit.
Examples of the No. of indoor units settings
No. of indoor units
Indoor unit setting (S004)
(Rotary switch, gray)
1 unit (factory setting)
set to 1
2 units
set to 2
9 units
set to 9
Examples of refrigerant circuit (R.C.) address settings (required when link wiring is used)
System address
No.
System address
(S003)
(2P DIP switch, black)
System address
(S002)
(Rotary switch, yellow)
System 1 (factory setting)
Both OFF
ON
1
2
ON
OFF
set to 1
System 11
1 ON
ON
1
2
ON
OFF
set to 1
System 21
2 ON
ON
1
2
ON
OFF
set to 1
System 30
1 & 2 ON
ON
1
2
ON
OFF
set to 0
Used for installing the external timer for the silent mode.
(Refer to Section 1-14. Servicing and Maintenance Functions in Service Manual.)
SM830209-00̲Mini̲VRF SYS.indb 4
SM830209-00̲Mini̲VRF SYS.indb 4
2012/01/11 18:24:12
2012/01/11 18:24:12
