Toshiba MMU-P0121H Service Manual page 113

3-7-1-4. LED display on indoor P.C. board
<General type>
Part No. Color
D13 Orange
D11 Green
D22 Red
D51 Yellow
Displayed content
Serial receive
Serial send
Alarm stop display
Cycle communication
Indoor P.C. board parts layout drawing
Flashes synchronized with the receive signal from the
standard remote controller.
Flashes synchronized with the send signal to the
standard remote controller.
Goes on when the indoor unit stops with fault.
Flashes synchronized with receive signal from the
outdoor unit.
D11 (Green)
D13 (Orange)
D22 (Red)
D51 (Yellow))
3-110
Details