Mitsubishi Electric MA-E100R-E Service Manual page 19

(2) Test Modes
„ Error History Check Mode
1 Starting procedure
A. When the power switch is OFF, press the "Manual" switch and "Auto" switch 3 times
simultaneously.
B. Turn ON the power switch within 2 seconds.
C. After the error history check mode starts up, select a mode using the "Manual" switch.
D. The mode changes as 0 → 1 → 2 → 3 → 4 ... 7 → 0, and it is indicated with LEDs.
E. Mode 0: The most current error, Mode 7: The oldest error
F. Turn OFF the power switch to end the error history check mode.
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