Diagnosis And Solution; Indoor Unit Trouble Shooting - Pioneer YN020GMFI22M2D Service Manual

Multi split system outdoor units/two, three, four and five zones

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8.4 Diagnosis and Solution

8.4.1.1 Indoor unit EEPROM parameter error 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.

PCB main chip does not receive feedback from EEPROM chip

● Installation mistake

● PCB faulty

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