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8.4 Diagnosis and Solution
8.4.1 Indoor unit trouble shooting
8.4.1.1
Indoor unit EEPROM parameter error diagnosis and solution.
Malfunction decision
conditions
PCB main chip does not receive feedback from EEPROM chip
● Installation mistake
● PCB faulty
Trouble shooting:
Supposed causes
EEPROM: aread‐onlymemorywhosecontentscanbeerasedandreprogrammedusingapulsedvoltage.
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