Gree GMV5E Series Service Manual page 182

GREE
Error judgment condition and method:
Check if the reading of address chip, memory chip and clock chip of ODU mainboard is normal. If
the data of address chip, memory chip and clock chip cannot be read, it is abnormal.
Possible reason：
■Address chip is abnormal
■Memory chip is abnormal
■Clock chip is abnormal
Troubleshooting:
2.2.4.59 "F1" High pressure sensor error
Error display: ODU mainboard, IDU wired controller and IDU receive light board will
display
Error judgment condition and method:
Sample the AD value of high pressure sensor through sensor detecting circuit and judge the range
of AD value; if the sampled AD value exceeds upper limit and lower limit in 30 seconds continuously,
report the error.
Possible reason：
■Poor contact between high pressure sensor and terminal in mainboard interface
■Poor contact between high pressure sensor and pressure detection position of unit
■High pressure sensor is abnormal
■Detecting circuit of sensor is abnormal
GMV5E DC INVERTER VRF UNITS SERVICE MANUAL
178