Set JREC to "INSPECTION" and press DREC-D and DREC-U simultaneously. 4. Summary Table of Key Error Codes Error Code Key Areas to Check 0430/0431 Brake Switch Mismatch Brake Contacts, SB/KB contactors 0447 Encoder Deviation Encoder Wiring, Rope Slippage 0450 Releveling Failure Leveling Sensors, Brake Adjustment 0435 Motor Overtemperature Cooling Fan, Motor Load 0352 Door Position Fail Door Operator, Limit Switches SH/SB_Fault Contactor Fault Safety Loop, Auxiliary Contacts