7-Segment Display Function; 7-Segment Display On The Outdoor Unit (Interface P.c. Board); Check Procedure When The System Has Stopped Due To An Trouble; How To Read The Check Display - Toshiba MiNi-SMMS MCY-MAP0501HT Service Manual

10-6. 7-Segment Display Function

n 7-segment display on the outdoor unit (Interface P.C. board)
On the interface control P .C. board, a 7-segment LED is provided to check the operating status.
The displayed contents are changed by combining the setup numbers of the rotary switches (SW01, SW02
and SW03) on the I/F P .C. board.
7-segment
display A
2nd. 1st. 3rd.
place place place
u Check procedure when the system has stopped due to an trouble
When the system has stopped due to an trouble in the outdoor unit, execute the follow-
ing check procedure.
1. Open the panels of the outdoor unit, and then check the 7-segment display.
The check code is shown on the right side of 7-segment display B.
[U1] [¡¡¡]
∗ Rotary switch setup for confirming the check code: SW01 [1], SW02 [1], SW03 [1].
However the check code [OOO] is displayed for 3 seconds and the sub-code [OOO] for 1 second
are alternately displayed if a sub-code is provided.
2. Confirm the check code, and then follow the check procedure detailed for the diagnosis of the fault.
3. [U1] [E28] on the 7-segment display means an error on the follower unit. change.
Push and hold switch SW04 on the header unit for 2 seconds or more.
Only the fan of the outdoor unit with a fault will operate. Open the panel of the corresponding unit, and
then confirm the ceck code shown on the 7-segment display.
4. Perform the check procedure based on each check code diagnosis.

How to read the check display

7-segment display
0 1 2 3
a c e G
7-segment
display B
2nd. 1st.
place place
([¡¡¡]: Check code)
4 5 6 7 8
h i n o
Interface P .C. board
SW06 SW07 SW08 SW09
CN30 CN31 SW05 SW15
CN32 SW04
D600 D601 D602 D603 D604
Display A
Display B
SW01 SW02 SW03
9 A b C
r S t V y
144
SW06 SW07 SW08
CN30 CN31 SW05
CN32 SW04
D600 D601 D602 D603
Display A
SW01 SW02 SW03
d E F H J
– u
SW09
SW15
D604
Display B
L P