Segment Display Function - Toshiba MMD-AP0071SH-C Service Manual

8-6. 7-Segment Display Function

n 7-segment display on the outdoor unit (Interface P.C. board)
On the interface control P .C. board, 7-segment LED to check the operating status is provided on the control P .C.
board.
The displayed contents are changed by combining the setup numbers of the rotary switches (SW01, SW02, and
SW03) on P .C. board.
7-segment
display A
2nd. 1st. 3rd.
place place place
u Check procedure in case of stop with trouble
When the system stopped due to a trouble of the outdoor unit, execute a check in the following
procedure.
1. Open the panel of the outdoor unit, and then check the 7-segment display.
The check code is displayed at the right side of 7-segment display B.
[U1] [¡¡¡] ([¡¡¡]: Check code)
∗ Switch setup when confirming the check code: SW01 [1], SW02 [1], SW03 [1]
However the check code [¡¡¡] is displayed for 3 seconds and the sub-code [¡¡¡] for 1 second
are alternately displayed if an sub-code is provided.
2. Confirm the check code, and then conduct the check operation based on the procedure of each
check code diagnosis.
3. [U1] [E28] on 7-segment display means a trouble on the follower unit.
Push the push-switch SW04 on the header unit for several seconds. (2 seconds or more)
As only the fan of the outdoor unit with a trouble drives, open the panel of the corresponding unit, and
then confirm the check code displayed with 7-segment.
4. Perform the check operation based on the procedure of each check code diagnosis.
How to read the check monitor
<7-segment display>
0 1 2 3 4
a c e G h
Interface P .C. board
7-segment
display B
2nd. 1st.
place place
5 6 7 8
i n o r
SW06 SW07 SW08 SW09
CN30 CN31
SW05 SW15
CN32 SW04
D600 D601 D602 D603 D604
Display A
Display A
Display B
SW01 SW02 SW03
9 A b C d
S t V y –
108
SW06 SW07 SW08 SW09
CN30 CN31 SW05 SW15
CN32 SW04
D600 D601 D602 D603 D604
Display B
SW01 SW02 SW03
E F H J L
u
P