Gree GMV6 DC Inverter VRF Units Service Manual
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2.68 "F9" Discharge Temperature Sensor Fault of Compressor 5
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 discharge temperature sensor and the main board interface;
■ Abnormal discharge temperature sensor;
■ Abnormal detection circuit.
Troubleshooting:
Yes
"F9" Discha rge
Temperature Sen sor Fault
of Compre ssor 5
Remove the foreign
matters and plug it tightly
The detection circuit may
ope rate impro perly
Yes
Replace th e main control
boa rd
No
Whether th e i nter face
terminal between the main boa rd
and the te mpe rature se nso r ge ts l oose o r
contains forei gn matters?
No
Replace th e tempera tur e sensor