Gree GMVVQ1015WM/C-X, Service Manual

Page: 160 / 433

Gree GMV6 HR DC Inverter VRF Units Service Manual
158
■
Poor contact between temperature sensor and terminal in main board interface
■
Temperature sensor is abnormal
■
Detecting circuit is abnormal
Troubleshooting:
Yes
“Fd” mode exchan g e b o x
outlet pipe temperature
sensor 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 of mode exchange box
No
Replace the
temperature sensor directly, is the
error disappeared?
Is the terminal between main
board and mode exchange box outlet
pipe temperature sensor loose
or any foreign objects inside?
No
2.94
“
Fn” Mode exchanger inlet pipe temperature sensor error
Error display: mode exchanger main board will display
Applicable mode: all mode exchangers
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 5 seconds
continuously, report the error
Possible reasons:
■
Poor contact between inlet pipe temperature sensor and terminal in main board interface
■
Inlet pipe temperature sensor is abnormal
■
Detecting circuit is abnormal
Troubleshooting:
Step 1: check the terminal between mode exchanger 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.