Panasonic 2WAY Multi Technical & Service Manual page 51

● The designation (/) is used in the table to indicate indoor boards for DC and AC motor models.
● There is no TEST pin on the indoor board for AC motor models.
● 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
● See instructions packaged with servicing indoor board for procedure on replacing indoor non-volatile
memory (EEPROM) and replacing indoor control board.
● See "5. Reference Document" for checking remote controller.
2) When the water heat exchanger unit is connected
An error may be assumed when no regular communication occurs between the outdoor unit and water heat
exchanger unit for 3 minutes.
• When the power to the outdoor unit has not been switched on.
• When the terminating resistance switch (S010) on the outdoor unit's main board is set to [OPEN].
• When the number of indoor units set with parameter No.10 on the outdoor unit's main board is anything
other than two.
• When the address switches on the water heat exchanger unit and outdoor unit do not match up.
• When an error occurs with the indoor/outdoor operation wiring (short-circuit, severed wires, ground.)
• When electrical voltage is applied to the indoor/outdoor operation wiring.
• When the outdoor unit has broken down.
• Effects of noise.
IV–38