Gree GMV-Y36WL/A-T, Service Manual

Page: 94 / 147

GREE hotovoltaic Multi VRF for North America
92
Description of each stage of debugging progress
——
Debugging code
Code meaning and operation method
Progress
LED
Code Display status
automatically.)
09/oC
Display
circularly
Refrigerant is normal and unit will display as in
the left for 2s.Then next step starts.
10_ Status
judgments of
outdoor valves
before startup
10/on
Display
circularly
Valves of ODU are being inspected.
Compressor will start operation for 2min or so
and then stop. The opening and closing status
of outdoor valves are as below:
10/U6
Display
circularly
Outdoor valves are not fully turned on. Press
main board’s SW4 button and display shows
“09/OC”. Then check if the gas and liquid valves
of ODU are completely open. After confirmation,
press the SW4 button again. Then compressor
will start running for about 2min to inspect the
status of valves.
10/oC
Display
circularly
Valves status is normal. Unit will display as in
the left for 2s and then start next step.
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(For
heat pump units
only)
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.