Gree GMV-VQ680WM/C-X Service Manual page 135

Gree
"dd" solar energy temperature
main board and solar energy water
temperature sensor loose or any foreign
temperature sensor directly,
2.70 "dn" Swing assy error
Error display: display in the monitor software only
Applicable model: Multi VRF indoor unit with swing assy
Error judgment condition and method:
Report alarm through judging the status of limit switch 1 and 2, When the swing structure is faulted, the
indoor unit will not stop, the display board does not display error code (the error will only be embodied in CAN
communication data)
Possible reasons:
■Poor contact between limit switch and terminal in main board interface
■Detecting circuit is abnormal
Troubleshooting:
sensor error
Is the terminal between
objects inside?
No
Replace the
is the error disappeared?
No
Detecting circuit might
be abnormal
"dn" swing assy error
Check the terminal between
main board and limit switch to see if it is
loose or any foreign objects
inside?
No
Replace the limit switch 1
and 2, is the error disappeared?
No
Detecting circuit might
be abnormal
GMV6 HR DC Inverter VRF Units Service Manual
If it is loosened or there are
Yes
foreign objects, retighten it
after treatment
Yes
Replace the main control
board of hydro box
Yes
Yes
Replace the main control
board
133
If it is loosened or there are
foreign objects, retighten it
after treatment