Gree GMV-1015WM/G-U, Service Manual

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Gree GMV6 DC Inverter VRF Units Service Manual
172
Yes
“LL” waterflow
switch error
If it is loosened or there
are foreign objects,
retighten it after treatment
Detecting circuit might
be abnormal
Yes
Replace the main
control board
No
Replace the water flow switch
of generator directly
Is the terminal between
Mainboard and water flow switch loose
or any foreign objects inside?
Supplement water again for
the generator waterway
when unblocking the
generator waterway
Is there circulating water in the
circulated waterway of generator?
No
No
Yes
2.131 “LF” Shunt valve setting error
Error display: wired controller of hydro box will display
Applicable model: hydro box
Error judgment condition and method:
When setting the corresponding relationship for the floor heating shunt valve and IDU, the generator shall
detect and judge the project code of IDU to see if the nonexistent project code is set or shunt valve setting error
alarm occurs if the same shunt valve is matching with several IDUs (project code)
Possible reasons
■ IDU linked with floor heating is offline
■ Project code conflict or IP conflict
Troubleshooting
Step 1: check if the IDU corresponding to the shunt valve is offline, if yes, the IDU is deemed offline;
Step 2: check if the project code or IP is conflict, if yes, adjust the relationship between shunt valve and IDU again,
allow several shunt valves to match with the same IDU (project code), but never allow the same shunt valve to
match with several IDUs (project code).