Brother BC800 Service Manual page 133

Failure Investigation for Electronic Parts Error message list
Error display
F01 Abnormal rotation in main motor
F02 Key pressed continually with power ON (motor unit SW)
Key pressed continually with power ON
F03
(operation system SW)
F04 FC disconnect
F05 Dirty speed sensor
F06 NP sensor disconnect
F07 Speed VR disconnect
F08 Power failure
6 - 2
Cause Explain
Motor runs at more than maximum speed
Pushing S/S or NP or BK button continually
Pushing button continually except S/S or NP or
BK switch
FC disconnects
No encorder signal than the rated value
NP sensor disconnect
Speed volume disconnect
DC power is not in the range of rated value