Segment Display Function - Toshiba MD-VNK802HEXE Service Manual

9-6. 7-segment display function

Outdoor unit 7-segment display (Interface board)
The 7-segment display is equipped on the interface control board for checking the operation status.
The display is changed by the combination of the setting numbers of the rotary switch on the board.
Interface board
◆ Procedure for checking when an abnormal stop has occurred
If the system stopped due to an outdoor unit error, follow the procedure below:
1
Open the outdoor unit panel and the inspection window of the electrical control box to check the
7-segment display.
The check code is displayed on the right side of the 7-segment display.
[U1][ ] ([ ]: Check code)
* Switch setting for checking the check code: Set [SW01 / SW02 / SW03] to [1 / 1 / 1].
If there is also an auxiliary code, the check code [
second, alternately.
2
Check the check code, and then follow the diagnosis procedure for each check code.
3
If the 7-segment display is [U1][E28], an error has occurred on the terminal unit.
Press the push switch [SW04] on the center unit for several seconds.
The outdoor fan of the outdoor unit where the error occurred starts running.
Open the outdoor unit panel to check the 7-segment display.
4
Follow the diagnosis procedure for each check code.
Push switch
7-segment display [A]
] appears for 3 seconds and the auxiliary code for 1
99
7-segment display [B]
Rotary switch