Diagnosis And Solution - York YU2E18YJ6AMHO-Y Service Manual

7.4 Diagnosis and Solution

7.4.1 Indoor unit trouble shooting
7.4.1.1 Indoor unit EEPROM parameter error diagnosis and solution.
Malfunction conditions
Potential causes
Trouble shooting:
EEPROM: a type of read-only memory. The contents can be erased and reprogrammed using a pulsed
voltage. To locate the EEPROM chip,.
Indoor or outdoor PCB main chip does not receive feedback
from EEPROM chip.
Installation mistake
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Faulty PCB
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