Mitsubishi Alarm Code #300, #301, #302, #303, #304, #305

Alarm Code #300, #301, #302, #303, #304, #305
Model CPE52, 53, 14, 15, 15V, 16
Failure MODE, UP, DOWN, ENTER, LEFT, or RIGHT key switch failure
( MODE : #300, UP : #301, DOWN : #302, ENTER : #303, LEFT : #304, RIGHT : #305 )
Countermeasure
<< Cause >>
• Key switch short circuit
• Misoperation by turning ON the unit power supply while one of MODE, UP, DOWN,
ENTER, LEFT or RIGHT key is turned ON.
• Defective PCB – D or PCB – C board
< Check >
Turn OFF and back ON again the power to unit to see if the trouble persists.
(Note)
Do not operate panel keys when the unit power supply switch is turned ON.
< Action >
Replace PCB-D or PCB-C board.