Gree GMV-VQ680WM/C-X Service Manual page 133

Gree
temperature sensor error
Mainboard and water return temperature
sensor loose or any foreign objects
Replace the temperature sensor
directly, is the error disappeared?
2.66 "dP" Floor heating water inlet temperature sensor error
Error display: hydro box wired controller
Applicable model: all hydro boxes
Error judgment condition and method:
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 hydro box main board and temperature sensor interface terminal 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.
2.67"dU" Floor heating water outlet pipe temperature sensor error
Error display: wired controller of hydro box will display
Applicable model: hydro box
Error judgment condition and method:
1) 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 5 seconds
continuously, report the error
"dJ" water return
Is the terminal between
inside?
No
No
Yes
Detecting circuit might
be abnormal
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If it is loosened or there
Yes
are foreign objects,
retighten it after treatment
Replace the main control
board of hydro box
131