OHAUS Frontier FC5714, Service Manual, Page: 38 / 43

38 MAINTENANCE
42 Short circuit in the frequency
converter
Frequency converter defective, motor
defective
43 Under voltage frequency converter Brief power failure, At revision no.1 it could
be, that the frequency relay is defective,
cable break, plug is loosen (between
control board to frequency converter)
44 Over voltage frequency converter Break resistant is defective, the rotor is
braked to strong
45 Over temperature frequency
converter
Motor runs hard, ventilation is defective,
frequency converter is not cooled enough
46 Over temperature motor Motor runs hard, ventilation is defective
47 Over current frequency converter Frequency converter is defective, motor is
defective
48 Timeout between control unit and
frequency converter
Software of the unit has a black out
49 Other error frequency converter Summary of very specific error, which
should normally not occur.
(No release, internal timing error, system
error, reset by watch dog, start a trial with
direction of rotation error, program memory
CRC error)
55 Overspeed Transmission error, firmware error,
frequency converter us defective.
70 Timeout at control unit through the
RS232 interface
RS232 connection is interrupted.
99 Rotor is not allowed in this
centrifuge
The number of the inserted rotor does not
exist in the data record of the software.
rotor no No rotor detected It was no rotor installed. Transponder in
the rotor is defective or missing, antenna
defective, cable break, plug is loosen,
control board defective. In rare cases a
transponder-antenna combination can
cause a reduce range, that a conversation
can't occur.
FALSE The rotor, which is stored in the
program, does not match with the
inserted rotor.
There was chosen a program, in which a
certain rotor is stored, but the inserted rotor
is another one.