Gree GMV-VQ680WM/C-X Service Manual page 194

Gree
main board and limit switch loose or
Replace the limit switch 1 and 2,
2.134 "n0" System Energy Efficiency Running Settings Status
Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit
display
Fault diagnosis:
This is a status code of a function. It indicates that the unit has entered energy efficiency state. "00"
indicates comfort as priority; "01" indicates energy efficiency as priority, in which case the unit is up to
15% more efficient.
Possible causes: --
Troubleshooting: not required.
2.135 "n2" Settings Status of Maximum Capacity Configuration Rate
for Indoor and Outdoor Units
Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit
display
Fault diagnosis:
This is a status code of a function. It indicates that the unit has entered settings status of maximum
capacity configuration rate for indoor and outdoor units.
Possible causes: --
Troubleshooting: not required.
"Ln" lifting panel return air
frame reset is abnormal
Is the terminal between
any foreign objects inside?
No
is the error disappeared?
No
The detecting circuit
might be abnormal
GMV6 HR DC Inverter VRF Units Service Manual
Yes
retighten it after treatment
Yes
Replace the main
control board
192
If it is loosened or there
are foreign objects,