Gree GMV MTAC VRF Series, Service Manual

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Gree GMV MTAC VRF for North America
81
Description of each stage of debugging progress
—
Debugging code
Code meaning and operation method
Progress
LED
Code Display status
12_ Confirm
debugging
startup
12/AP Display circularly
Ready for units to start debugging. Press main board’s SW3
button to confirm startup of debugging. 2s later, main board
will display as below:
12/AE Display circularly
Startup is confirmed. After displaying for 2s, system will
choose “15_Cooling debugging” or “16_Heating debugging”
according to ambient temperature. If the project requests to
add refrigerant but it is not complemented before
debugging, then refrigerant can be added in this process
through the L-VALVE.
15_ Cooling
debugging
15/AC Display circularly
Debugging for cooling mode. If no malfunction occurs for
50min when compressor is running, then the system is
certified as normal. After shutting down the unit for 5s, the
system will enter normal standby status.
15/error code Display circularly Malfunction occurs when debugging for cooling mode.
16_ Heating
debugging
16/AH Display circularly
Debugging for heating mode. If no malfunction occurs for
50min when compressor is running, then the system is
certified as normal. After shutting down the unit for 5s, the
system will enter normal standby status.
16/error code Display circularly Malfunction occurs when debugging for heating mode.
17_ Debugging
finished
oF ON
The entire unit has finished debugging and under
standby-by condition.