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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
SW09
SW10
SW11
SW12 SW13
SW14
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.
SW04
SW05
SW15
Push switch
D600 D601 D602 D603 D604
SW01
SW02
SW03
7-segment
display [A]
142
151
Push switch
SW04
SW05
SW15
7-segment
display [B]
D600 D601 D602 D603 D604
SW01
SW02
SW03
Rotary switches
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Troubleshooting
