Brother DB2-DD7100A Instruction Manual download pdf (Page 165)

DB2-DD7100A 146

Problem

Possible cause Page

15. TROUBLESHOOTING

14. Oil gauge is not visible in oil

sight glass.

● Is the oil tank empty?

Fill the oil tank with oil.

● Is the oil gauge damaged?

Replace the oil gauge.

Oil gauge

15

–

15. "ou" flashes in LED display

when power is turned on.

● Is the power supply voltage

abnormally high?

Check that the power supply

voltage matches the control

box voltage specifications.

–

Voltage rating label

● Is the synchronizer connector inside

the control box disconnected?

Insert the connector securely.

16. "U" flashes in LED display

when power is turned on.

19

17. "UE" flashes in LED display

when power is turned on and

treadle is pressed.

● Is detector pin q of the bobbin thread

detector not retracted correctly?

Retract the detector pin q.

Use an Allen key to move the slider w,

and check that the detector pin

q moves

correctly.

q

w

119

18. "oF" flashes in LED display

when power is turned on and

treadle is pressed.

● Is the machine connector inside

the control box disconnected?

Insert the connector securely.

● Is the machine head tilted back?

Return the machine head to

its normal position.

19

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