Without a serial number the code would indicate a 24 volt truck. We had 3 cats with that system (sauer danfoss) in our rental fleet. Just about everything you do requires a BPK handset or BPS software. The service manual says a teach in procedure is required. This is done with the handset or software. I know the joystick is different than the 36 volt trucks. The 36 volt is plug and play. The correct part number I found is RL474898. Code AL230 indicates failure in power stage detected during power on. Power stage and brake won't switch on. Correction check battery voltage low.
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