Are connectors of sensor properly
connected?
Reconnect
yes
no
Are resistance and temperature
characteristics of sensor
acceptable?
Replace sensor
Check PCB and replace
yes
yes
yes
no
no
If chip is broken?
Replace chip
Normal
yes
3.EEPROM failure
no
Reinstall in right direction
2.Sensor failure
no
Check PCB and replace
EEPROM chip installed firmly
Is the PCB poorly
w elded?
4. Over current protection
Check the system, fan motor,
EEV, valve, Te, Tc sensor etc.
Replace the power module
yes
Check the wiring
condition
Re-wire as the wiring diagram
yes
no
no
Check if the compressor current
is more than the trip current
64