Support Function In Test Operation - Toshiba MMU-AP0091H Installation Manual

14. SUPPORT FUNCTION IN TEST OPERATION

14-1. 7-segment display function of outdoor unit (I/F P.C. board)
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 exchanged by combining the setup numbers of the rotary switches (SW01, SW02,
and SW03) on P .C. board.
7-segment
display A
2nd 1nd 3nd
place place place
u Check procedure when stop with trouble occurred
When the system stopped due to a trouble of the outdoor unit, execute a check in the following
procedure.
1. Open 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.
[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 perform the check operation based on the procedure of each check
code diagnosis.
3. [U1] [E28] on 7-segment display means a trouble on the terminal unit.
Push the push-switch SW04 on the center unit for several seconds.
As only the fan of the outdoor unit with a trouble drives, open 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>
Interface P .C. board
7-segment
display B
2nd 1nd
place place
SW06 SW07 SW08 SW09
CN30 CN31 SW05 SW15
CN32 SW04
D600 D601 D602 D603 D604
Display A Display A
SW01 SW02 SW03 Display B
140
SW06 SW07 SW08 SW09
CN30 CN31 SW05 SW15
CN32 SW04
D600 D601 D602 D603 D604
Display B
SW01 SW02 SW03