Matrix T50x-02 - Error Codes 02 B9;02 BA;02 BB;01 AB Troubleshooting

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7.12 Error message 02B9 / 02BA/ 02BB / 01AB troubleshooting
Figure A
[Symptom ]
02B9 - The inner memory IC data write error.
02BA - The inner memory IC data read error.
02BB - Inverter hardware interrupt error.
01AB - Inverter Error
[Solution]
a. Check LED DSP1 (MCU) on the MCB (Figure A).
b. If this LED is blinking, replace the console.
c. If this LED is a constant light, replace the MCB.
d. If this LED is not lit at all, check the power to the MCB.