N3 Drive Operations Manual
Error Display Codes
Cont.
87
21.3 Manually Recoverable Errors Only (no auto-restart)
Display
Fault
Cause
Remedy
OC
Over-current during
stop
1. OC detection circuit
malfunction.
2. Bad connection for CT signal
cable.
Send the inverter back for repair.
OL1
Motor overload
1. Motor under-sized.
2. Improper settings
for Parameters A002
and A119-A122.
1. Increase motor capacity.
2. Set A002, A119 - A122
accordingly.
OL2
Inverter overload
Excessive Load.
Increase the inverter capacity.
OL3
Over torque
1. Excessive Load.
2. Improper settings of
parameters A125 and A126
1. Increase the inverter capacity.
2. Set A125 and A126 accordingly.
LVC
Undervoltage
during operation
1. Input voltage too low.
2. Input voltage varies widely.
(fluctuates)
3. Main Circuit Relay error.
1. Improve input voltage quality
or increase the value of
parameter A014.
2. Set a longer acceleration time.
(Parameter b0007 )
3. Add a line reactor to the input side.
4. Send the inverter back for repair.
OH-C
Heat-sink
temperature
too high during
operation
1. Excessive load.
2. Ambient temperature too
high or poor ventilation.
1. Check the load.
2. Increase inverter capacity.
3. Improve ventilation
conditions.
21.4 Setup Configuration and Interface Errors
Display
Fault
Description
STPO
Zero speed stop
Set frequency <0.1Hz Increase set frequency
STP1
Fail to direct start
on power up
1. If the inverter is set for external terminal control mode (b000=1), and
direct start on power up is disabled (A017 = 0001), the inverter cannot
be started and will flash STP1 when the run switch is ON and power is
applied. (Refer to descriptions of A017).
2. Set A017 = 0001 for direct start.
Cont.
