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12. LIST OF ERROR CODES
RH-981A
79
Errors during operation
Code Explanation Resetting method
E-71
Needle down sensor is not activated within a
specified time.
Turn off the power and check that connector P2 on the control
circuit board is properly connected.
E-72
Cutter sensor is not activated within a
specified time.
1. Turn off the power.
2. Check that air is reaching the valve.
3. Check that connectors P3 and P4 on the control circuit board
are properly connected.
E-75
Lower thread trimming OFF sensor is not
activated within a specified time.
1. Turn off the power.
2. Check that air is reaching the valve.
3. Check that connector P8 on the control circuit board is properly
connected.
E-76
Needle up sensor is OFF during test feeding.
Turn off the power and turn the pulley by hand to raise the needle
bar to its highest position.
E-77
Synch signal is not activated within a
specified time.
Turn off the power and check that connector P2 on the control
circuit board is properly connected.
E-80
X home position sensor is not set to ON
within a specified time of searching home
position.
Turn off the power and check that connector P7 on the control
circuit board is properly connected.
E-81
Y home position sensor is not set to ON
within a specified time of searching home
position.
Turn off the power and check that connector P6 on the control
circuit board is properly connected.
E-82
θ home position sensor is not set to ON
within a specified time of searching home
position.
1. Turn off the power.
2. Check that connectors P11 and P13 on the control circuit board
are properly connected.
3. Check that connectors P1, P2 and P3 on the θ axis PMD circuit
board are properly connected.
E-89 Machine motor reverse operation error
Turn off the power and check that the motor cord is properly
connected.
Hardware errors
Code Explanation Resetting method
E-90
Communication error (against machine motor
CPU)
1. Turn off the power.
2. Check that connector P18 on the control circuit board is properly
connected.
3. Check that connector P1 on the panel circuit board is properly
connected.
E-91 Machine motor running error
Turn off the power and check that connector P2 on the control
circuit board is properly connected.
E-92 Abnormal voltage error
1. Turn off the power.
2. Check that the power supply voltage matches the rated voltage.
3. Check that connector P20 on the control circuit board is properly
connected.
E-93
Fan (large) lock error
Turn off the power and check that connector P10 on the control
circuit board is properly connected.
E-94 Fan (small) lock error
Turn off the power and check that connector P25 on the control
circuit board is properly connected.
E-95 X motor overcurrent error
Turn off the power and check that connector P7 on the control
circuit board is properly connected.
E-96 Y motor overcurrent error
Turn off the power and check that connector P6 on the control
circuit board is properly connected.
E-97 Control circuit board temperature rise error
Turn off the power and check that the inside of the control box is
being properly ventilated.
E-98 Power supply relay error
Turn off the power and check that connector P20 on the control
circuit board is properly connected.
E-99 Power supply circuit board overcurrent error
Turn off the power and check that connectors P12 and P13 on the
control circuit board are properly connected.