Diagnosis And Solution; Indoor Unit Trouble Shooting; Indoor Eeprom Malfunction Diagnosis And Solution - Pioneer YN018GMFI16M2D Service Manual

9.4 Diagnosis and Solution

9.4.1 Indoor unit trouble shooting

9.4.1.1 Indoor EEPROM malfunction diagnosis and solution.

Malfunction decision
conditions
Trouble shooting:
Supposed causes
EEPROM: a read‐only memory whose contents can be erased and reprogrammed using a pulsed voltage. For the
location of EEPROM chip, please refer to the below photos.
9.4.1.2 Communication malfunction between indoor and outdoor units diagnosis and
solution.
Malfunction
decision
conditions
Supposed causes
PCB main chip does not receive feedback from EEPROM chip
● Installation mistake
● PCB faulty
Indoor unit does not receive the feedback from outdoor unit
during 120 seconds.
● Wiring mistake
● Indoor or outdoor PCB faulty