Matrix T50x-02, Service Manual

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7.7 Error message 01 A3 troubleshooting
[Symptom ]
Motor is disconnected.
[Solution]
a. Check the connection of the motor cable at the MCB (Figure A).
b. Check if the MCB LED DSP1 (MCU) is lit (Figure B).
c. If LED DSP1 is blinking, the motor should be replaced.
d. If LED DSP1 is a solid light, replace the motor.
e. If LED DSP1 is not lit, replace the MCB.
Figure A Figure B