Panasonic (WH-UD12CE5-A-1, Service Manual

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17.3 Breakdown Self Diagnosis Function
17.3.1 Self Diagnosis Function (Three Digits Alphanumeric Code)
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When abnormality occur during operation, the system will stop operation, and OFF/ON control panel LED will
blink and error code will display on the control panel Timer display LCD.
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Even error code is reset by turning OFF power supply or by pressing ERROR RESET button, if the system
abnormality is still un-repaired, system will again stop operation, and OFF/ON control panel LED will again blink.
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The error code will store in IC memory.
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To check the error code
1 When an abnormality occurs, system will stop operation and OFF/ON control panel LED will blink.
2 Error code of the abnormality will display on the control panel Timer display LCD.
3 To determine the abnormality description, the Error Code Table needs to be referred.
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To display past/last error code
1 Turn ON power supply.
2 Press and hold the CHECK button for more than 5 seconds to enter status mode.
3 Press the SEARCH DOWN/UP button to retrieve past/last error code.
4 Press the CANCEL button or wait 30 seconds to exit status mode.
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To permanently delete error code from IC memory
1 Turn ON power supply.
2 Press and hold the ERROR RESET button for more than 8 seconds till a beep sound is heard.