9.2.2 Open or short circuit of temperature sensor diagnosis and solution.
9.2.3 EEPROM parameter error diagnosis and solution
9.2.4 Zero crossing detection error
When such failure occurs, the main control board must have fault.
Replace indoor PCB
Shut off the power supply and turn on it 5s later
The problem comes out again
Is the EEPROM chip plugged in indoor PCB well?
No
Correct the connection
Replace the main PCB of indoor unit
Yes
Replace outdoor PCB
Yes
Check the connections between
the sensors and the PCB. Are the
connections good?
Replace the sensor and check if
the errors happen again?
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