Panasonic CU-J50DBE8 Service Manual page 75

• If the "CHECK" display on the wired remote controller is not blinking, press the CHECK switch continuously for 5 seconds or
more to display the problem details for the last problem or the problem before that.
• You can then switch between the display for the previous problem and the problem before that by pressing the UP (TIMER)
DOWN (TIMER) switches.
• Press the CHECK switch once more to return to the normal display.
• The display can be switched between the previous problem and the one before that by pressing the UP (TIMER) DOWN
(TIMER) switches.
• After eliminating the cause of the problem, press the CHECK switch once more to return to the normal display.
If "CHECK" is not blinking on the timer
Example of previous problem display
Example of abnormality display before previous display
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