Owner's Manual

10. ERROR CODES
RH-9820
113
Device-related errors
Items with a “*” in the “Page” column should only be checked by a qualified technician.
Code Cause Remedy Page
E630
Lower thread trimmer does not operate,
or lower thread trimming sensor is faulty.
Turn off the power, and then check that the valve harness
connector and sensor connector are inserted at the main
P.C. board.
19*
E650
Hammer is lowered, or hammer position
sensor is faulty.
Turn off the power, and then check that the hammer valve
harness connector and hammer position sensor connector
are inserted at the main P.C. board.
19*
E651
Hammer is not lowered, or hammer
position sensor is faulty.
Turn off the power, and then check that the hammer valve
harness connector and hammer position sensor connector
are inserted at the main P.C. board.
19*
P.C. board-related errors
Items with a “*” in the “Page” column should only be checked by a qualified technician.
Code Cause Remedy Page
E700 Abnormal rise in power supply voltage. Turn off the power and check the input voltage.
23*
E701
Abnormal rise in sewing machine motor
drive voltage.
Turn off the power, and then check the voltage.
20*
E705 Abnormal drop in power supply voltage. Turn off the power and check the input voltage.
23*
E710
Abnormal current detected in sewing
machine motor.
Turn off the power, and then check if there are any
problems with the sewing machine.
*
E719 Problem detected with PMD P.C. board. Turn off the power, and then check the PMD P.C. board.
20*
E740 Cooling fan does not operate.
Turn off the power, and then check that the cooling fan
sensor connector is connected at the main P.C. board.
19*
If an error code that is not listed above appears or if carrying out the specified remedy does not solve the problem, contact the
place of purchase.