Brother International BAS-343E Instruction Manual - English - Page 58

12. Error codes Error codes (Bobbin changer) If an operation problem occurs, a buzzer will sound and an error code will appear on the display screen. Code Cause Remedy E.71 If the sensor on the underside of the bobbin 1.Check the changer motor and the wires connected cassette does not activate when the bobbin to the motor. changer is rotated: 2. Check the sensor at the back of the cassette and the wires connected to the sensor. 1. The changer motor does not operate correctly. 2. The sensor does not operate correctly. E.72 There is no space in the bobbin cassette when Make enough space in the bobbin cassette. the rotary hook bobbin tries to return to the bobbin cassette. The sensor does not turn on or off when it should. Check whether the tab might be holding the bobbin and causing the problem. E.73 The sensor which detects the raised cylinder arm Check the cylinder sensor for detecting the raised does not turn on when the arm is raised. cylinder arm and the wires connected to the sensor. The sensor which detects the lowered cylinder Check the cylinder sensor for detecting the lowered arm does not turn on when the arm is lowered. arm cylinder and the wires connected to the sensor. E.74 The bobbin is already in the changer at the Check that the bobbin is in the rotary hook rather bobbin retract position. than in the changer at the sewing start. BAS-343E 51