Samsung AR TSF BWKNCV Series Service manual

TECHNICAL BULLETIN 2020-0015
Date: 08/06/2020
Subject: RAC 2.0 Common Option Settings
Models: AR**TSF*BWKNCV (RNS***BT), AR**TSF*BWKXCV (RXS****T)
Samsung HVAC maintains a policy of ongoing development, specifications are subject to change without notice.
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RAC 2.0 Common Option Settings
© 2020 Samsung HVAC
Various installation option settings are available for Samsung RAC 2.0 systems to modify system operation or to utilize
features not enabled from the factory. Installation options can be modified via the included wireless remote controller, an
optional wired controller, or with the SNET Pro 2 service software (requires the use of a MIM-C02N service tool, sold
separately). Each segment or digit within the "02" installation option code represents a separate option. There are a total
of 24 segments in the installation option code - including page numbers, but not every segment is used for every model.
Below is a general description of each segment that is used for RAC 2.0 indoor units.
020000-100000-200001-300000
Page number
Option setting type
Auto clean
External temp. sensor / reduced fan
Central control use
Page number
Drain pump
Page number
External contact control
External contact output
Page number
Individual control of wireless controller
Display options
Use of chime
Filter cleaning reminder
Segment 3: Auto clean
The auto clean option is used to remove moisture from the evaporator coil after the indoor unit is turned off. This setting
will operate the indoor fan for 10 to 30 minutes depending on conditions to dry the evaporator coil. This helps to prevent
the buildup of mold on the evaporator coil, thus helping to eliminate odor. The end user can cancel the Auto Clean
function while it is running by pressing and holding the "Options" button on the wireless remote for 3 or more seconds.
Value
0 (default)
1
Details
Disabled
Enabled
Auto clean
Programming instructions and examples can be found on page 7 of this document

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Segment 4: External room temperature sensor / Fan thermal-OFF settings
The external room temperature sensor option should be enabled when installing an optional external temperature sensor
MRW-TA. When this option is set, heating compensation is set to 0°F (default heating compensation is 3.6°F). Segment 4
also provides an option to stop the fan when the indoor unit is in a thermal-OFF state.
Value
0 (default)
1
External sensor
Disabled
Enabled
External room sensor / Fan thermal-OFF settings
Segment 5: Central controller use
The central controller option is used when the system needs to be tracked and controlled by a Samsung upper level
controller (DMS 2.5, BACnet/LonWorks gateways, or the central touch controller). This is enabled by default.
*Channel address setting must be enabled and the channel address set to avoid communication conflicts with
other systems.
Value
1 (default)
0 Disabled
Central control
Details
Enabled
MRW-TA
6
7
Disabled
Enabled
Fan off in thermal-OFF
No
No
Yes
Yes
Segment 8: Overflow switch
The overflow switch option is used when interlocking a normally closed, 3rd party condensate float switch to the indoor unit.
If the switch opens, the system will shut off and display error code E665 or C665, depending on display option setting. The
indoor unit includes a female plug adapter as standard.
*If segment 8 is enabled, segment 14 (external contact control) is automatically disabled.
Value
0 (default)
8
Overflow switch
Details
Disabled
Use external drain pump
Sub-PCB Wire (inside IDU)
Female plug for
external contact
control
0 volt, dry contact (normally closed)
Interface module (purchased separately)

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Segment 14: External contact control input
The external contact control option is used to control an indoor unit via an external dry contact. This option must also be
set to use segment 15 (external contact output). Either MIM-B14 external contact control interface module, wired
controller sub-PCB (purchased separately) integral CN83 pigtail, or included female plug referenced in the segment 8
section, must be used depending on the application.
*If segment 8 is enabled, segment 14 (external contact control) is automatically disabled.
Value
0 (default)
1
2
3
8
9
A
B
Off only reverse control
Window On / Off reverse control
Disabled
On / Off control
Off only control
Window On / Off control
Disabled
On / Off reverse control
External contact control
Details
Segment 15: External contact output
The external contact control output option provides a 0V dry contact signal to interlock external devices. The output can
be configured to close/open based on Thermal ON/OFF (default setting) or close/open based on Operation ON/OFF.
*Option segment 14 (external contact control) must also be set to use segment 15 (external contact control output)
Value
0 (default)
1
External contact output
Details
Thermal On/Off output
Operation On/Off output
MIM-B14
6
5
3
4
2
1
CN83 Plug
(included with MIM-B14)
CN81 Plug
(included with MIM-B14)
MIM-A00UN Wired Controller
Sub-PCB installed in indoor
unit
1/2: Error output
3/4: Operation output
5/6: External contact control input
4 PIN: Error check
(MIM-B14)
Wired
Remote
Controller
RAC PCB
Connection
2 PIN: External ON/OFF
Control (MIM-B14)
COM2 (F3, F4)
Connection example using MIM-B14 and a wired controller sub-PCB
Details regarding external contact control can be found on the following page.
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Remove female plug, connect with
appropriate insulated wire connectors
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(normally closed)
Connection example using a wired controller sub-PCB Connection example using the female plug adapter
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Feature MIM-B14
Terminals Option If Then
Contact Opens - Unit turns OFF
- Controller ENABLED (unit can be turned on via controller)
Contact Closes - Indoor unit turns ON in previous mode
Contact Opens - Unit turns OFF
- Controller DISABLED (unit cannot be turned on via controller)
Contact Closes
(while unit is OFF)
- Unit remains OFF/STANDBY (does not turn on in previous mode)
- Controller ENABLED (controller or schedule event can turn on the
unit)
Contact Opens - Unit turns OFF
- Controller DISABLED (unit cannot be turned on via controller)
Contact Closes
- Unit goes into previous state (STANDBY/operation, plus all
settings)
- Controller ENABLED (unit can be controlled via controller)
External
Contact
Control
5 / 6
ON/OFF Control
OFF-Only
Control ¹
Window ON/OFF
Control
Contact Opens
- Unit turns OFF
- Controller ENABLED (unit can be turned on via controller)
Contact Closes
Contact Opens
(while unit is OFF)
- Unit turns OFF
- Controller DISABLED (unit cannot be turned on via controller)
Contact Closes
Contact Opens
- Unit turns OFF
- Controller DISABLED (unit cannot be turned on via controller)
Contact Closes
ON/OFF
Reverse Control
OFF-Only
Reverse Control ¹
Window ON/OFF
Reverse Control
- Indoor unit turns ON in previous mode
- Unit remains OFF/STANDBY (does not turn on in previous mode)
- Controller ENABLED (controller or schedule event can turn on the
unit)
- Unit goes into previous state (STANDBY/operation, plus all settings)
- Controller ENABLED (unit can be controlled via controller)
¹ Off-only control is ideal for float switch and energy saving device (example: motion sensor, manual timer, etc.) connection.
² External contact control must be enabled. If external contact control is not required, simply install a jumper between terminals 5 and 6.
Feature MIM-B14
Terminals Option If Then
Cooling Thermal-ON - Contact = CLOSED
Cooling Thermal-OFF - Contact = OPEN
Heating Thermal-ON - Contact = CLOSED
Heating Thermal-OFF - Contact = OPEN
FAN mode or STANDBY - Contact = OPEN
Unit ON - Contact = CLOSED
Unit OFF - Contact = OPEN
No error - Contact = CLOSED
Error - Contact = OPEN
Indoor Unit
Operation
Output
3 / 4
Thermal-ON/OFF
Output ²
Operation ON/
OFF Output
Error Status
Output 1 / 2N/A
MIM-B14 output
MIM-B14 Input

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Segment 18: Filter cleaning reminder
The indoor unit filter cleaning reminder can be enabled and adjusted from 180 hours of unit run time up to 2,000
hours of unit run time. The filter cleaning indictor is enabled from the factory. When unit run time reaches the
predetermined setting, the indoor unit will display "CF" to alert the end user the filter needs to be cleaned.
Value
0
7
2
3
4
5
6
1 (default)
8
9
A
300 hours
700 hours
180 hours
1,000 hours
1,250 hours
1,500 hours
1,750 hours
2,000 hours
Details
Disabled
500 hours
750 hours
Filter cleaning reminder
Segment 17: Use of chime
The indoor unit chime can be disabled with this option. The wireless remote can also be used to enable/disable the
chime. The indoor unit option setting has priority over the wireless remote setting.
Value
0 (default)
1
Details
Chime enabled
Chime disabled
Use of chime

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Segment 22: Display option
Various display options are available depending on end user preference. The end user can turn the display OFF/
ON with the wireless remote controller. The setting for segment 22 will dictate how much of the display is turned
off and how error codes will be displayed ("Exxx" or "Cxxx").
Display On/Off
0 (default) 88 segment off when display is off
1 Entire display off
288 segment off when display is off
3 Entire display off
Error code display with "C"
Display options
Value Details
Details
Error code display with "E"
Error code display with "E"
Error code display with "C"
Segment 20: Individual control of wireless controller (channel setting)
The indoor unit can be set to a specific channel or zone (1 - 4) for wireless remote controller use. This option is used when
multiple indoor units are in the same space and prevents an indoor unit from accepting the wireless signal if it is not
programmed to the same channel as the wireless controller. The end user selects which channel or zone they want to
control on the remote controller depending on which unit they want to adjust.
*The factory provided remote does not support this function. Wireless controller AR-EH03U or AR-EH04U is required.
Value
0 (default)
1
2
3
4Channel 4
Channel 1
Channel 1
Channel 2
Channel 3
Individual control of wireless controller
Details
88 Segment
Indoor unit display

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Single option programming examples
Press Press
Segment: 4Option setting: 7
Changing segment 4 for external temperature sensing using MRW-TA and stop the fan when the indoor unit is in
thermal-OFF
Press Press
1. Remove the batteries and wait for the screen to go blank. While holding the temperature up and down buttons,
replace the batteries.
2.
3.
4.
Use the FAN DOWN button to adjust the segment on the left and the FAN UP button to adjust the
segment on the right to enter code into the wireless controller as shown in the above images.
Press MODE to advance to the next page (noted by "Auto", "Cool", and "Dry").
All 6 segments must be entered to prevent undesired programming and operation.
Once the numbers shown above are entered into the controller, press the power button several times while
pointing remote at the indoor unit.
5.
6. Remove batteries. After the screen goes blank, replace batteries and cover to return to normal operation.
7. Cycle power to system.
Indoor unit programming with wireless controller
(single option setting method)
option setting
segment number
(tens digit)
installation option
setting mode
segment number
(ones digit)
single option
setting mode
Press Press
Segment: 8 Option setting: 1
Changing segment 8 to enable overflow switch detection.