Gree GMV-VQ680WM/C-X Service Manual page 159

Gree
2.92 "Fb" Shell Roof Temperature Sensor Fault of Compressor 2
Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit
display
Fault diagnosis:
The temperature sensor detection circuit samples the AD value of temperature sensor and
determines the range of AD value. When the sampled AD value exceeds the limits for 30 consecutive
seconds, the fault is generated.
Possible causes:
■ Poor contact between the shell roof temperature sensor and the main board interface;
■ Abnormal shell roof temperature sensor;
■ Abnormal detection circuit.
Troubleshooting:
Temperature Sen sor Fault
terminal between the main boa rd
and the te mpe rature se nso r ge ts l oose o r
contains forei gn matters?
Replace th e tempera tur e sensor
The detection circuit may
2.93 "Fd" Mode exchanger outlet pipe temperature sensor error
Error display: main board of mode exchanger will display
Applicable mode: mode exchanger
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:
"Fb" She ll Roof
of Compre ssor 2
Whether th e i nter face
No
No
ope rate impro perly
GMV6 HR DC Inverter VRF Units Service Manual
Yes
Remove the foreign
matters and plug it tightly
Yes
Replace th e main control
boa rd
157