Chapter 14 Fault CodesMH300
ID No.
Display Fault Name Description
16
IGBT overheating
(oH1)
IGBT temperature exceeds the protection level.
Action and Reset
Action condition
Depending on the model power, refer to Table 1 below.
When the setting for Pr.06-15 is higher than the oH1 level, oH1 error
occurs instead of oH1 warning. An IGBT overheating error occurs, and
the drive stops.
Fault treatment parameter N/A
Reset method Manual reset
Reset condition
Reset only when IGBT temperature is lower than oH1 error level minus
(-) 10°C
Record Yes
Cause Corrective Actions
Check if the ambient
temperature or temperature
inside the control cabinet is too
high, or if there is
the ventilation hole of the
control cabinet.
1. Check ambient temperature.
2. Regularly inspect the ventilation hole of the control cabinet.
3.
Change the installed place if there are heating objects, such as brake
resistors, in the surroundings.
4. Install
/ add cooling fan or air conditioner to lower the temperature
inside the cabinet.
Check if there is any
obstruction on the heat sink or
if the fan is running.
Remove the obstruction or replace the cooling fan.
Insufficient ventilation space Increase ventilation space of the drive.
Check if the drive matches the
corresponding load
1. Reduce the load
2. Reduce the carrier wave
3. Replace the drive with a larger capacity model.
The drive has run 100% or
more than 100% of the rated
output for a long time
Replace the drive with a larger capacity model.
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