Kruger Ecowatt K320 Series Operation Manual page 260

Ecowatt Drive K320 series
®
Fault
Fault type
code
Motor
OL1
overload
Inverter
OL2
overload
Phase loss on
SPI
input side
Phase loss on
SPO
output side
Overheat of
OH1 rectifier
module
Overheat of
OH2
VFD module
EF
External fault
Modbus/Mod
bus TCP
CE
communicati
on fault
Current
ItE detection
fault
Possible cause
Grid voltage is too low;
Rated motor current is set
improperly;
Motor stall or load jumps violently
Acceleration is too fast;
The motor in rotating is restarted;
Grid voltage is too low;
Load is too large;
Power is too small;
Phase loss or violent fluctuation
occurred to R, S and T input
Phase loss occurred to U, V, W
output (or the three phases of
motor is asymmetrical)
Air duct is blocked or fan is
damaged;
Ambient temperature is too high;
Long-time overload running
SI external fault input terminal
acts
Baud rate is set improperly;
Communication line fault;
Communication address error;
Communication suffers from
strong interference
Poor contact of the connector of
control board;
Hall component is damaged;
Exception occurred to
amplification circuit
Check grid voltage;
Reset rated motor current;
Check the load and adjust torque
boost
Increase acceleration time;
Avoid restart after stop;
Check grid voltage;
Select the VFD with larger
power;
Select proper motor
Check the input power;
Check installation wiring
Check the output wiring;
Check the motor and cable
Ventilate the air duct or replace
the fan;
Lower the ambient temperature
Check external device input
Set proper baud rate;
Check the wiring of
communication interfaces;
Set proper communication
address;
Replace or change the wiring to
enhance anti-interference
capacity
Check the connector and
re-plug;
Replace the hall component;
Replace the main control board
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Troubleshooting
Solution