Gree GMV-VQ680WM/C-X Service Manual page 196

Gree
2.140 "n9" Status of Querying Number of Online Indoor Units
Fault display: main board of outdoor unit displays
Fault diagnosis:
The code is a query status code, in which case you can query the number of online indoor units.
Possible causes: --
Troubleshooting: not required.
2.141 "nA" Heating and Cooling Unit
Fault display: main board of outdoor unit displays
Fault diagnosis:
The code indicates that the indoor unit operates in both heating and cooling modes.
Possible causes: --
Troubleshooting: not required.
2.142 "nH" Heating Only Unit
Fault display: main board of outdoor unit displays
Fault diagnosis:
The code indicates that the indoor unit only operates in heating mode.
Possible causes: --
Troubleshooting: not required.
2.143 "nC" Cooling Only Unit
Fault display: main board of outdoor unit displays
Fault diagnosis:
The code indicates that the indoor unit only operates in cooling mode.
Possible causes: --
Troubleshooting: not required.
2.144 "nE" Negative Number Code
Fault display: main board of outdoor unit displays
Fault diagnosis:
The code is a negative number code. It indicates that the number following the code is a negative one.
Possible causes: --
Troubleshooting: not required.
GMV6 HR DC Inverter VRF Units Service Manual
194