Gree GMV6 DC Inverter VRF Units Service Manual
90
Sample the AD value of temperature sensor through temperature sensor detecting circuit and judge
the range of AD value. If the sampling AD value exceeds upper limit and lower limit in 30 seconds
continuously, report the error
Possible reasons:
■
Poor contact between temperature sensor and terminal in main board interface
■
Temperature sensor is abnormal
■
Detecting circuit is abnormal
Troubleshooting:
Step 1: check the terminal between main board and temperature sensor to see if it is loose or any foreign
objects inside? If yes, reconnect it after treatment;
Step 2: check if the temperature sensor is abnormal, if yes, replace the temperature sensor;
Step 3: if the above inspections are normal, the detecting circuit might be abnormal, please replace the main
board.
2.30 "C0" Communication Fault Between Indoor and Outdoor Units
and Between Indoor Unit and Wired Controller
Fault display:
main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit
display
Fault diagnosis:
There is no communication between the outdoor unit and indoor unit or between the indoor unit and
wired controller for 30 seconds, and a fault is generated.
Possible causes:
■ Communication cables are connected wrongly or get loose;
■ Communicat
ion cables are broken;
■ Poor contact of communication cables;
■ Number of wired controllers connected or addresses are set improperly;
■ Controller operates improperly.
Troubleshooting:
If the main control board of outdoor unit does not display C0, check the connection between the
indoor unit and the wired controller; if the main control board of outdoor unit, indoor unit's receiver and
wired controller display C0, check the connection between the indoor unit and outdoor unit and between
the indoor unit and wired controller; if only the wired controller displays C0, check the connection between
the indoor unit and wired controller, the number of wired controllers connected and address settings.
Perform the troubleshooting as follows:
Summary of Contents for GMV-1015WM/G-U
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