7-Segment Display Function - Toshiba MCY-MUG0401HSW-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
Checking procedure to be followed in event of abnormal shutdown
If the system is shut down due to an error 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 7-segment display.
* Switch settings when confirming check code: set [SW01/ SW02/ SW03] to [1/1/1].
Normal state
[A] [B]
∗
Outdoor
unit No.
Abnormal
state
∗
Displays "err"
Outdoor
unit No.
Abnormal state (event of check code displaying indoor address in sub-code)
∗
Outdoor
Displays "err"
unit No.
2
Check the check code and follow the applicable diagnostic procedure.
Push switch
7-segment display
[A]
Displayed
alternately
Check code
Check code
213
Rotary switches
Sub-code
7-segment display
[B]
Sub-code
(indoor address)