Brother Z-8550A Service Manual page 125

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