CHAPTER 14: FAULT CODES AND DESCRIPTIONS
251 63-4528—04
DC BUS voltage is less than
Pr.06-00 at stop
1. Check if the input voltage is normal
2. Check for possible sudden load
Phase Loss
Check Power Source Input if all 3 input phases are connected
without loose contacts.
For models 40hp and above, please check if the fuse for the AC
input circuit is blown.
IGBT overheating
IGBT temperature exceeds
protection level
1 to15HP: 90
o
C
20 to 100HP: 100
o
C
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.
Heatsink overheating
Capacitance temperature
exceeds 90
o
C cause heatsink
overheating.
1. Ensure that the ambient temperature falls within the
specified temperature range.
2. Make sure heat sink is not obstructed. Check if the fan is
operating
3. Check if there is enough ventilation clearance for VFD.
Motor overheating
The VFD detects that the
internal temperature exceeds
Pr.06-30 (PTC level)
1. Make sure that the motor is not obstructed.
2. Ensure that the ambient temperature falls within the
specified temperature range.
3. Take the next higher power VFD model.
IGBT Hardware Error Return to the factory
Capacitor Hardware Error Return to the factory
Power off
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