Delta BLD-E1 brushless DC motor drive BLD-E1 Series - Manual (Page 151)

Chapter 4 ParametersAT |Troubleshooting}| BLD-E1 Series
5-4 Revision May 2009, 00DE, V0.50
5.5 Over Heat (oH1)
Brushless DC m otor driv e overheats
Heat sink overheats
Check if tem perature of heat sink
is greater than 90
O C
No
No
No
Yes
Yes
Yes
Yes
Yes
No
Reduce load
No
Temperature detection malfunctions.
Please c ontact D ELTA.
If cooling fan functions normally Change cooling fan
Check if cooling fan is jammed Remove obstruc tion
Check if surrounding temperature
is within specific ation
Adjust surrounding temperature
to specificat ion
Maybe brushless DC motor drive has
malf unction or m isoperat ion due to noise.
Please c ontact DELTA.
Is load too large
5.6 Overload
OL1/ OL2 OL
Reduc e load or inc rease the power of brus hl es s DC motor driv e
Check if the settings of electric
thermal relay are c orrect
Yes
Yes
No
No
Modify s etting
Is load too large
Maybe brushless DC motor drive has malfunction
or misoperation due to noise.