Gree GMVVQ1015WM/C-X, Service Manual

Page: 144 / 433

Gree GMV6 HR DC Inverter VRF Units Service Manual
142
2.77 "F1" High-pressure Sensor Fault
Fault display: main board of outdoor unit, wired controller of indoor unit and receiver of indoor unit
display
Fault diagnosis:
The sensor detection circuit samples the AD value of high pressure 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 high pressure sensor and the main board interface;
■ Poor contact between high pressure sensor and part where the pressure is detected;
■ Abnormal high pressure sensor;
■ Abnormal sensor detection circuit.
Troubleshooting:
Yes
No
"F1" High Pressure Sensor
Fault
Remove the foreign
matters and plug it tightly
Yes
The detection circuit may
ope rate impro perly
Yes
Replace th e main control
boa rd
Whether th ere is
poo r contact between high pre ssure
sensor and th e p art where the pressu re
is d etected?
No
Whether th e i nter face
terminal between the main boa rd
and the se nso r g ets loose o r contains
foreign matter s?
Remove the foreign
matters and plug it tightly
No
Is th e p roblem so lve d
afte r the sensor i s repla ced?