Gree GMV-VQ680WM/C-X Service Manual page 125

Gree
2.52 "d3" Ambient Temperature Sensor Fault
Fault display: 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 5 consecutive
seconds, the fault is generated.
Possible causes:
■ Poor contact between the ambient temperature sensor and the main board interface;
■ Abnormal ambient temperature sensor;
■ Abnormal detection circuit.
Troubleshooting:
and ambie nt temperature sensor g ets loose
2.53 "d4" Inlet Pipe Temperature Sensor Fault
Fault display: 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 5 consecutive seconds, the fault is generated.
Possible causes:
■ Poor contact between the inlet pipe temperature sensor and the main board interface;
■ Abnormal inlet pipe temperature sensor;
■ Abnormal detection circuit.
Troubleshooting:
"d3" Ambien t Temp erature
Sen sor Fault
Whether th e i nter face
terminal between the main boa rd
or contains foreig n matters?
No
Is th e p roblem so lve d after
the ambient tempera ture sensor
is re placed?
No
The detection circuit may
ope rate impro perly
GMV6 HR DC Inverter VRF Units Service Manual
Yes
matters and plug it tightly
Yes
Replace th e main control
boa rd
123
Remove the foreign