Gree Ultra Heat GMV-V72W/A-F, Service Manual, Page: 183 / 240

Ultra Heat GMV VRF Technical Service Manual REMOTE CONTROL
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3.2.3 LEDs and interfaces
Power LED: a red LED. When it is on, it indicates that the converter is normally supplied with power;
when it is off, it indicates that the converter's power supply is abnormal.
Communication LEDs: two yellow LEDs. When a PC is delivering data, the data transmitting LED
will flash; when an air conditioning unit is uploading data to the PC, the data receiving LED will flash.
Function LEDs: three green LEDs:
If the RS485 to USB LED is steady on, it indicates that the converter is working in RS485 mode.
If the CAN to USB LED is steady on, it indicates that the converter is working in CAN mode.
If the HBS to USB LED is steady on, it indicates that the converter is working in HBS mode.
USB interface: connects to a USB data line.
CAN interface: When air conditioners work in CAN mode, they are connected to the converter over
this CAN interface. This interface is not distinguished by polarity. Thus, the two contacts C1 and C2 can
be used interchangeably.
HBS interface: When air conditioners work in HBS mode, they are connected to the converter over
this HBS interface. This interface is not distinguished by polarity. At present, Gree Debugger and monitor
software do not support this interface.
RS485 interface: When air conditioners work in RS485 mode, they are connected to the converter
over this RS485 interface. This interface is distinguished by polarity. Thus, the two contacts A and B
cannot be used interchangeably.
3.2.4 Precautions
The converter should be installed indoors and prevented from being hit. It is recommended that the
converter is installed in the monitor room with PCs.
The converter does not need to be connected to a power supply. It is powered by the PC via the
USB interface.