Gree GMVVQ1015WM/C-X, Service Manual

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Gree GMV6 HR DC Inverter VRF Units Service Manual
100
Yes
No
No
"b3" Defrosting
Temperature Sen sor 2
Fault
Whether th e i nter face
terminal between the main boa rd and
temperature sensor gets loose or
contains forei gn matters?
Remove the foreign
matters and plug it tightly
Whether th e tempera tur e
sensor is abn ormal?
Yes
Replace th e tempera tur e
sensor
The detection circuit may
ope rate impro perly
Yes
Replace th e main control
boa rd
2.20 "b4" Subcooler's Liquid Outlet Temperature Sensor Fault
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 temperature sensor and the main board interface;
■ Abnormal temperature sensor;
■ Abnormal detection circuit.
Troubleshooting: