Operating Instructions

Fault Codes
Digital Keypad
313 | 443
ID*
Display on LCD Keypad
Fault Name
Fault Descriptions
16
IGBT overheating (oH1)
IGBT temperature exceeds the protection level.
Action and Reset
Action level
Depending on the model power, See 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 obstruction in the
ventilation hole of the control cabinet.
● Check ambient temperature.
● Regularly inspect the ventilation hole of the control cabinet.
● Change the installed place if there are heating objects, such as brake resistors, in the
surroundings.
● 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
● Reduce the load
● Reduce the carrier wave
● 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.
Table 1
Voltage
Model
OH1
(ºC)
Default for Pr.06-15
(ºC)
Single-phase_115V
RT0002-11N
95
90
RT0005-11N
95
90
RT001X-11N
100
95
Single-phase_230V
RT0002-21N
110
105
RT0005-21N
100
95
RT001X-21N
110
105
RT002X-21N
105
100
RT003X-21N
115
110
Three-phase_230V
RT0002-23N
100
95
RT0005-23N
100
95
RT001X-23N
105
100
Three-phase_230V
RT002X-23N
105
100