7-Segment Display Function - Toshiba MCY-MHP0404HS-E Service Manual

9-6. 7-segment display function

7-segment display on outdoor unit (interface P.C. board)
The interface control P.C. board features a 7-segment LED display designed to check operational status. Display
items can be changed by changing the combination of the number settings of rotary switches provided on the P.C.
board (SW01, SW02 and SW03).
Interface P.C. board
SW06 SW07
SW11 SW12 SW13
SW16 SW17
SW30
Checking procedure to be followed in event of abnormal shutdown
If the system is shut down due to a trouble in the outdoor unit, perform checks in the following steps:
1
Open the panel of the outdoor unit, and check the 7-segment display.
The check code is displayed in the right-hand section of the 7-segment display [B].
[U1] [OOO] ([OOO]: Check code)
* To check the check code, set the rotary switches SW01 / SW02 / SW03 to [1/1/1].
If there is a sub-code, the display alternates between the check code [OOO] (3 seconds) and the sub-code
[OOO] (1 second).
2
Check the check code and follow the applicable diagnostic procedure.
3
Perform checks in accordance with the diagnostic procedure applicable to the check code.
AMP Air Conditioning
SW04 SW05 SW15
D600 D601 D602 D603 D604
SW09 SW10
SW01 SW02 SW03
SW14
Push switch
SW04 SW05
7-segment
display [A]
D600 D601 D602 D603 D604
SW01 SW02
Rotary switches
142
151
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Push switch
SW15
7-segment
display [B]
SW03