F29 Indoor Nonvolatile Memory (Eeprom) Error - Panasonic 2WAY Multi Technical & Service Manual

F29 Indoor Nonvolatile Memory (EEPROM) Error

Error detection method
• An error is determined when the nonvolatile memory (EEPROM) on the indoor (water heat exchanger unit)
control board cannot be read or written.
Troubleshooting
1 Is the nonvolatile memory on the indoor (water heat exchanger
Nonvolatile 1-1 unit) control board correctly oriented in the IC socket, and
memory inserted fi rmly?
Replace the nonvolatile memory (provided with the servicing
1-2
board). Does this eliminate the error?
● See the instruction manual supplied with the Servicing Indoor Board for details on the procedures for
replacing the indoor non-volatile memory (EEPROM) and the indoor control board.
● Recover EEPROM malfunctions when connected to a water heat exchanger units by replacing the board.
● See "5. Reference Document" for details on the procedure for replacing the water heat exchanger unit's
control board.
● For board and Electrical Wiring Diagram, see Chapter 6.
• Outdoor main board: page VI-2
• Outdoor power board: page VI-3
• Converter board: VI-4
• Indoor control board for DC motor models: page VI-5
• Outdoor Unit Electrical Wiring Diagram: page VI-6
IV–63
Yes 1-2
No Repair
Yes Defective EEPROM
Replace indoor control
No
board