Chapter 6 Fault Code Information and Maintenance
6-2
Fault
Name
Fault Descriptions Corrective Actions
Overheating
Heat sink temperature too high
1. Ensure that the ambient temperature falls
within the specified temperature range.
2. Make sure that the ventilation holes are not
obstructed.
3. Remove any foreign objects from the
heatsinks and check for possible dirty heat
sink fins.
4. Check the fan and clean it.
5. Provide enough spacing for adequate
ventilation. (See chapter 1)
Low voltage
The AC motor drive detects
that the DC bus voltage has
fallen below its minimum
value.
1. Check whether the input voltage falls within
the AC motor drive rated input voltage range.
2. Check for abnormal load in motor.
3. Check for correct wiring of input power to R-S-
T (for 3-phase models) without phase loss.
Overload
The AC motor drive detects
excessive drive output current.
NOTE: The AC motor drive
can withstand up to 150% of
the rated current for a
maximum of 60 seconds.
1. Check whether the motor is overloaded.
2. Reduce torque compensation setting in
Pr.07.02.
3. Use the next higher power AC motor drive
model.
Overload 1
Internal electronic overload trip
1. Check for possible motor overload.
2. Check electronic thermal overload setting.
3. Use a higher power motor.
4. Reduce the current level so that the drive
output current does not exceed the value set
by the Motor Rated Current Pr.07.00.
Overload 2
Motor overload.
1. Reduce the motor load.
2. Adjust the over-torque detection setting to an
appropriate setting (Pr.06.03 to Pr.06.05).
CC (current clamp)
Return to the factory.
OV hardware fault
GFF hardware fault
OC hardware fault
External Base Block.
(Refer to Pr. 08.07)
1. When the external input terminal (B.B) is
active, the AC motor drive output will be turned
off.
2. Deactivate the external input terminal (B.B) to
operate the AC motor drive again.
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