Terminal L1 / L2 / S: Power Supply Input
• Dx-coil controller should be connected to the main power supply by means of a switch with a contact separation of at
least 3 mm. If the outdoor unit is a VRF model (SMMS or SHRM series), connect it to L1 / L2.
Terminal Uv(U1) / Uv(U2): Communication line (Dx-coil controller and outdoor units)
• Details regarding the wiring can be found in the installation manual of the VRF outdoor unit.
Terminal AB / AB: Remote controller Wiring
• At these terminals an optional wired remote controller can be attached.
(Useful for installation, maintenance and Group control)
Terminal Function Description
DO1 Operating output Digital output DC12 V
DO2 Alarm active digital output Digital output DC12 V
DO3 Fan motor active digital output Digital output DC12 V
DO4 Defrost mode digital output Digital output DC12 V
DO5 DO1 Digital output 1 (User defined) Digital output DC12 V
DO6 DO2 Digital output 2 (User defined) Digital output DC12 V
DO7 Thermostat ON digital output Digital output DC12 V
DO8 Cooling / heating start up control signal output Digital output DC12 V
DO9 Pre defrost signal output Digital output DC12 V
DOA Cooling OPEN / heating CLOSE output Digital output DC12 V
DOB Notice code output Digital output DC12 V
DOC Fan high speed output Digital output DC12 V
DOD Fan medium speed output Digital output DC12 V
DOE Fan low speed output Digital output DC12 V
N1 Blank none -
N2 Blank none -
DI1 Safety (Normal close) Digital input DC12 V or No voltage
DI2 External trouble input Digital input DC12 V or No voltage
DI3 Forced thermostat OFF input Digital input DC12 V or No voltage
DI4 Notice code input Digital input DC12 V or No voltage
DI5 Operation mode input (cool / heat) Digital input DC12 V or No voltage
DI6 External ON / OFF input Digital input DC5 V
AI1 Input 1 (4-20 mA) Analog input 4 - 20 mA
AI2 Input 2 (4-20 mA) Analog input 4 - 20 mA
AI3 Input 1 (0-10 V) Analog input 0 - 10 V
AI4 Input 2 (0-10 V) Analog input 0 - 10 V
AO1 Output 1 (0-10 V) Analog output 0 - 10 V
AO2 Output 2 (0-10 V) Analog output 0 - 10 V
R, BL, OR, Y, W PMV 1 / PMV 2 - R: DC12 V
MdG Modbus G - -
MdA / MdB Modbus A / Modbus B - -
Outdoor unit
Remote controller
Dx-coil controller
Uv(U1) / Uv(U2)
AB / AB
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