REXROTH Fv Series, Instruction Manual

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8 Fault Indication
8.1 Fault Types and Solutions
Fault
No. Fault name
and code
Possible reason Solution
1
Over current
at constant
speed
(O.C.-1)
1. Sudden change in run mode 1. Reduce occurrence and sacle of sudden change
2. Low mains voltage 2. Motor power has to match with converter power
3. Motor power and converter power do not
match
3. Check input power supply
4. Too large inertia or load 4. Check motor power, converter power, load
5. Pulse encoder fault 5. Check pulse encoder and its connection
2
Over current
during accel‐
eration
(O.C.-2)
1. Too large start frequency 1. Reduce start frequency
2. Too large load rotation inertia, too large im‐
pact load
2. Increase acceleration time, reduce sudden load
change
3. Improper motor parameter setting
3. Set motor parameters properly or auto tune mo‐
tor parameters (group S2)
4. Direct start during motor running
4. Restart after motor stop, or start with rotation
speed capture (group b1)
5. Too short acceleration time 5. Increase acceleration time
6. Motor power and converter power do not
match
6. Motor power has to match with converter power
7. Pulse encoder fault 7. Check pulse encoder and its connection
8. Improper V/F curve 8. Adjust V/F curve setting and torque increase
3
Over current
during decel‐
eration
(O.C.-3)
1. Improper motor parameter setting 1. Improper motor parameter setting
2. Too large load rotation inertia 2. Use suitable brake components
3. Too short deceleration time 3. Increase deceleration time
4. Motor power and converter power do not
match
4. Motor power has to match with converter power
5. Pulse encoder fault 5. Check pulse encoder and its connection
4
Over voltage
at constant
speed
(O.E.-1)
1. Motor to earth short circuit 1. Check motor connection
2. Abnormal input power supply 2. Check input power supply
3. Too large load rotation inertia 3. Use suitable brake components
4. Improper speed loop parameter setting in
vecotor control
4. Adjust PI of speed loop (group S1)
5
5: Over volt‐
age during
acceleration
(O.E.-2)
1. Motor to earth short circuit 1. Check motor connection
2. Abnormal input power supply 2. Check input power supply
3. Direct start during motor running
3. Restart after motor stop, or start with rotation
speed capture (group b1)
DOK-RCON02-FV*********IB01-EN-P
Rexroth Frequency Converter Fv Bosch Rexroth AG 139/219
Fault Indication