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Z-8550A, 8560A
15. ERROR CODES
116
<P.C. board-related errors>
Code Cause and remedy
Err 700 Abnormal rise in power supply voltage. Turn off the power switch and check the power supply voltage.
Err 701
Abnormal rise in sewing machine motor power supply voltage. Turn off the power, and then check the voltage.
Problem with power supply P.C. board.
Err 705 Abnormal drop in power supply voltage. Turn off the power switch and check the power supply voltage.
Err 710
Abnormal current detected in sewing machine motor. Turn off the power switch, and then check if there are
any problems with the sewing machine. Problem with power supply P.C. board.
Err 711
Abnormal current detected in needle zigzag motor. Turn off the power switch, move the needle bar sideways
and check that it does not move stiffly. Problem with PMD P.C. board.
Err 740
Cooling fan connector is not connected correctly, or fan is not operating. Alternatively, the oil pan fan is not
connected correctly, or the fan is not operating. Turn off the power switch and check.
Err 790
Blown solenoid fuse has been detected. Turn off the power switch and check.
(8A fuse on main P.C. board)
Err 791
Abnormal current detected in sewing machine solenoid. Turn off the power switch and check the resistances
of the solenoids. Problem with main P.C. board.
NOTE:
S-7200A error code comparison table
Error code
S-7200A Z-8550A/8560A
Error details
Err 1 Err 701
Overvoltage (450 V power supply voltage is over 450 V, or regeneration ON caused it to
rise above 450 V)
Err 2 Err 710 Overcurrent (Alarm signal detected in ARM IPM)
Err 3 Err 131
Sewing machine motor encoder
(If UVW pole pattern in encoder is an unrecognized pattern)
Err 4 Err 130 Lock detected (If either needle up or needle down signal is not input for 3 seconds)
Err 5 Err 50
Machine head tilt detection (if the machine head detection switch does not turn on when
the treadle is depressed forward)
Err 6 Err 95 Voltage drop (If treadle is depressed forward when power is turned on)
Err 8 Err 190
Sewing machine motor overtime (when motor has been run continuously for 3 minutes or
more)
Err 9 Err 150
Sewing machine motor abnormal overheating (if temperature sensor inside sewing
machine motor exceeds the specified temperature)
Err 10 Err 791 Solenoid overcurrent detection (If solenoid overcurrent detection has operated)
Err 11 Err 151
Problem with sewing machine motor temperature sensor (e.g. open circuit in temperature
sensor)
Err 12 Err 790 Blown solenoid fuse (If solenoid power supply + E1 is 0 V)
Err 13 Err 90 Treadle is not connected correctly (If treadle voltage is outside the specified range)
Err 14 Err 450
Machine head detection problem (If data in machine head detection unit is outside the
specified values)
Err 15 Err 132
Problem with sewing machine motor operation
(If sewing machine motor speed exceeds 5500 rpm when needle up or needle down signal
is detected)
Err 16 Err 191
Thread trimmer solenoid overtime (if thread trimmer solenoid operating time exceeds 0.8
sec.)
Err 20 Err 91 Problem with treadle setting (If treadle position data is outside the specified range)
Err 100 Err 100 Grease-up warning
Err 101 Err 101 If DIP switch No. 4 is ON