REXROTH Fv Series, Instruction Manual

Page: 142 / 222

Fault
No. Fault name
and code
Possible reason Solution
6
Over voltage
during decel‐
eration
(O.E.-3)
1. Motor to earth short circuit 1. Check motor connection
2. Too large load rotation inertia 2. Use suitable brake components
3. Too short deceleration time 3. Increase deceleration time
7
Converter
over load
(O.L.-1)
1. Long time over load 1. Reduce over load time, reduce load
2. Too large proportion of V/F curve
2. Adjsut V/F proportionand torque increase set‐
tings
3. Motor power and converter power do not
match
3. Motor power has to match with converter power
4. Improper motor parameter setting
4. Set motor parameters properly or auto tune mo‐
tor parameters (group S2)
5. Direct start during motor running
5. Restart after motor stop, or start with rotation
speed capture (group b1)
6. Low mains voltage 6. Check input power supply
7. Too short acceleration time 7. Increase acceleration time
8
Motor over
load
(O.L.-2)
1. Motor locked 1. Prevent motor lock
2 Normal motor runs long time with large load
at low speed
2. Use variable frequency motor or increase con‐
verter output frequency
3. Low voltage of input power supply 3. Check input power supply
4. Too large proportion of V/F curve
4. Adjsut V/F proportionand torque increase set‐
tings
5. Too large sudden load change 5. Check load
6. Improper setting of motor over load protec‐
tion factor
6. Adjust setting of motor over load protection factor
(group E4)
9
CPU read/
write fault
(R.E.)
Fault or illeagal data in control board read/
write
Contact with technical service
10
Operating
panel read/
write fault
(KEY-)
Fault or illegal data in control board read/write Contact with technical service
11
External de‐
vice fault
(E.-St)
External fault caused by input signals via ex‐
ternal terminals
Check external terminals status, check respective
reason to fault
12
Communica‐
tion fault
(R.S.)
1. Device connection problem 1. Check device communication connection
2. Improper baud rate setting 2. Set proper baud rate
13
Circuit dis‐
connection
(C.F.)
Disconnecion of control circuit Contact with technial service
Bosch Rexroth AG DOK-RCON02-FV*********IB01-EN-P
Rexroth Frequency Converter Fv
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Fault Indication