Delta MS300 Series User Manual page 489

Chapter 13 Warning CodesMS300
ID No. Display on LCD Keypad
9
Action Condition
Action Time
Warning Setting Parameter
Reset Method
Reset Condition
Record
Cause
Check if the ambient temperature
or temperature inside the cabinet
is too high, or if there is
obstruction in the ventilation hole
of the control cabinet.
Check if there is any obstruction
on the heat sink or if the fan is
running
Insufficient ventilation space
Check if the drive matches the
corresponded loading
The drive has run 100% or more of
the rated output for a long time
oH1 Warning Condition
Voltage
One-phase_115V
One-phase_230V
Three-phase_230V
Warning Name
IGBT over-heating
warning (oH1)
Action and Reset
Pr.06-15
"oH1" warning occurs when IGBT temperature is higher than Pr.06-15 setting
value.
N/A
Auto-reset
The drive auto-resets when IGBT temperature is lower than oH1 warning level
minus (–) 5°C
N/A
1. Check the 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.
Remove the obstruction or replace the cooling fan.
Increase ventilation space of the drive.
1. Decrease loading.
2. Decrease the carrier wave.
3. Replace with a drive with larger capacity.
Replace with a drive with larger capacity.
Model
(NOTE: x＝A or E)
VFD1A6MS11x□□AA
VFD2A5MS11x□□AA
VFD4A8MS11x□□AA
VFD1A6MS21x□□AA
VFD2A8MS21x□□AA
VFD4A8MS21x□□AA
VFD7A5MS21x□□AA
VFD11AMS21x□□AA
VFD1A6M23x□□AA
VFD2A8MS23x□□AA
VFD4A8MS23x□□AA
The AC motor drive detects IGBT overheating and
exceeds the protection condition of oH1 warning.
(When Pr.06-15 is higher than the IGBT overheating
protection condition, the drive shows oH1 error without
displaying oH1 warning.)
Corrective Actions
oH1 (ºC)
95
95
100
110
100
110
105
115
100
100
105
480
Description
oH Warning
oH1 Warning = Pr.06-15 (ºC)
oH1 Warning = oH1 – 5