FC300
Chapter 5 Diagnostics and Troubleshooting
CPU
CPU fault
Inverter fault, needs factory repair
EEP
Memory error
Needs repair
EF
External fault
External fault, which is inverter input function
oFF
Reserved
dEr
Parameter setting error Set parameters correctly
5.4 Diagnostics
5.4.1 Press running key but motor does not rotate.
1. False running mode setting, i.e., start running by operation panel in external terminal
control mode, or , start by external terminal in operation panel mode.
2. Frequency command is too low or no frequency command is set
3. False peripheral wiring, e.g. false 2-wire system, 3-wire system and false setting of relative
parameters.
4. False setting of multi-functional output terminal (in external terminal control mode)
5. Inverter is in fault protection condition
6. Motor fault
7. Inverter fault
5.4.2 Parameter is not settable.
1. User password is locked. Please unlock it then set parameter.
2. Inverter is under running.
3. Abnormal connector wiring and abnormal digital operator communication.
the operator after power-off and assemble it for another try.
Disassemble
5.4.3Motor cannot reverse.
Check whether P067 is set as 1. If it is set as 0 then reverse is forbidden.
5.4.4 Motor rotates oppositely.
False motor output wiring. Please exchange the connection of any two lines among U, V, W.
5.4.5 Motor deceleration is too slow.
1. Deceleration time is set too long. Decrease deceleration time.
2. Install braking resistor.
3. Add DC braking.
5.4.6 Motor overheat.
1. Load is too big. Actual torque exceeds motor rated torque. It is recommendable to increase
motor capacity.
2. Environment temperature is too high. In environment with high temperature, motor will
burn out. Please decrease the surrounding temperature.
39
    "