Janome MB-4 Error Codes & Fixes

E:00: Please power down and restart again. (Communication error with the RCS. The machine won’t display this error on the RCS. Instead the screen will not go to the next step from the ‘Welcome screen’.)

1. Check the connection going from the RCS plug into the RCS unit and the connector on the machine to the ‘B’ board.

2. Try another RCS unit to determine which part is the problem.

E:01: Please power down and restart again. (There is a problem with a stepping motor not initializing correctly or at all.)

1. With the machine off, manually move the head to needle #4, push the carriage unit all of the way to the front and to the right. Turn on the machine and see which doesn’t calibrate.

2. While holding down the Start/Stop & Reverse buttons, turn on the machine. Release the buttons once you see icons on the screen:

A. Press “Phase” then ‘All Init’ to calibrate the machine, then press “Cancel”.

B. Check the “Needle” and press the left & right arrow keys to bring the needle to #4 then back to #1 to check the step motor & sensors. Press “Cancel” to exit.

C. Press “Pick-Up” and press “Init” to check the thread catcher. Press “Cancel” to exit.

D. Press “Sensor Solenoid” and press “Solenoid1” to check [QQQQQQ] and “Solenoid2” to check [QQQQQQ]. Press “Cancel” to exit.

E. Press “Cut Motor” and press “Init” to calibrate the dynamic cutter. Now press “Divide” then “Init” once again to check the cutter.

E:02: Please power down and restart again. (Needle bar changeover.)

1. Remove the stationary cover then turn the hand wheel to 270°. Using a 2.5mm hex driver, turn the silver gear on the needle-change step motor to move the head from needle bar #1 to #4 then

back to #1 to check for any binds. If there is a bind, adjust ‘head play’ as shown in the service manual.

2. Check and adjust ‘moving head stop position’ and ‘needle stop position’ as shown in the service manual.

E:03: Needle bar is out of position. Press OK to move the needle bar to switching position. (Needle bar change over phase.)

1. Remove the stationary cover then turn the hand wheel to 270°. Using a 2.5mm hex driver, turn the silver gear on the needle-change step motor to move the head from needle bar #1 to #4 then

back to #1 to check for any binds. If there is a bind, adjust ‘head play’ as shown in the service manual.

2. Check and adjust ‘moving head stop position’ and ‘needle stop position’ as shown in the service manual.

E:04: Lock!!. (There is a problem with the DCMotor.)

1. Clean the sensor on the DC motor and check if the shield plate on the motor is not loose or hitting the sensor. If either the sensor or shield plate is damaged, replace the motor.

2. Try resetting the DC motor. Hold down the Forward & Bobbin Winder buttons on the RCS unit then turn on the machine. Press the button called “Clear”. Turn off the machine.

E:05: Rethread and start. (Either themachine broke the thread or it thinks the thread is broken.)

1. Remove any thread, then the tension unit cover. Now run the machine and quickly spin the small wheel by hand (depending on which needle is being ‘sewn’). If it still gives you the error, check

the connections or replace the circuit board.

2. If you do not get the error, check: needle position (left-right & front-back), needle bar height, presser bar height, hook timing, and clearance.

E:07: Please power down and restart again. (The thread cutter malfunctioned.)

1. Check the connections and any binds in the thread cutter linkage. Replace the dynamic thread cutter unit if necessary.

E:08: Pull the tension release lever. (The lever that opens the tension discs may be engaged.)

1. Make sure the lever is not engaged (keeping the tension discs open) and check the connections.

2. Remove the tension unit cover and check the position of the microswitch. Adjust the position of this microswitch. Replace the microswitch if necessary.

E:09: Please power down and restart again. (The driving motor malfunctioned.)

Replace DCMotor

1. While holding down the Bobbin Winder & Forward buttons on the RCS, turn on the machine.

2. Once a menu appears on the screen, release the buttons. Press ‘Clear’.

3. Turn the machine off then back on like normal.

 

If you have any questions please head over to our Support Page or ask a question in the comments below. 

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