Ecowatt
®
Drive K120 series
Fault tracking
-119-
6.2.2
Fault reset
You can reset the VFD through the STOP/RST key on the keypad, digital inputs, or by
cutting off the VFD power. After faults are removed, the motor can be start again.
6.2.3
VFD faults and solutions
When a fault occurred, handle the fault as follows.
1.
When a VFD fault occurred, confirm whether keypad display is improper? If yes,
contact Kruger.
2.
If keypad works properly, check the function codes in P07 group to confirm the
corresponding fault record parameters, and determine the real state when current
fault occurred through parameters.
3.
Check the table below to see whether corresponding exception states exist based on
the corresponding corrective measures.
4.
Rule out the faults or ask for help from professionals.
5.
After confirming faults are removed, reset the fault and start running.
Fault
code
Fault type
Possible cause
Solution
OUt1
Inverter unit U
phase
protection
Acceleration is too fast.
IGBT module is damaged.
Misacts caused by
interference.
Drive wires are poorly
connected.
To-ground short circuit
occurs.
Increase acceleration
time.
Replace the power unit.
Check the drive wires.
Check whether there is
strong interference
surrounds the
peripheral equipment.
OUt2
Inverter unit V
phase
protection
OUt3
Inverter unit W
phase
protection
OV1
Overvoltage
during
acceleration
Exception occurred to
input voltage;
Large energy feedback.
Lack of braking units.
Dynamic brake is not
enabled.
Check the input power.
Check whether load
deceleration time is too
short; or the motor
starts during rotating.
Install dynamic braking
units.
Check the setup of
related function codes.
OV2
Overvoltage
during
deceleration
OV3
Overvoltage
during
constant speed
running
OC1
Overcurrent
during
acceleration
Acceleration/deceleration
is too fast.
Grid voltage is too low.
Increase acceleration/
deceleration time.
Check the input power.
Summary of Contents for Ecowatt Drive K120 Series
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