Dear Sir:
has 2 options this error:
1) elevation motor: a) motor faulty b) grease and lube the gear c) adjust the potentiomenter d) gear and bars lube e) main motor board faulty. see my personal TIPS FOR HELp.
2) see the attached diagram for adjust the reed swithc, clean, and tight the ribbon cable from keypad , and tight the connector from display board vs lower board. b) the display boad can be faulty.
In short after you did the adjustment,RUN INMEDIATELY, the software calibration for diagnose and troubleshooting.
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