Delta Electronics AC Motor Drive VFD-VE Series - Manual (Page 219)

Chapter 5 Troubleshooting|
5-4 Revision August 2008, 03VE, SW V2.04
5.5 Over Heat (oH1, oH2, oH3)
AC motor driv e overheats
Heat sink overheats
Check if temper atur e of heat si nk
is larger than 90
O C
No
No
No
Yes
Yes
Yes
Yes
Yes
No
Reduc e load
No
Temperature detection mal functions.
Please contac t DELTA.
If cooling fan functions normally Change cooling fan
Check if cooling fan is jammed Remove obstruc tion
Check if sur roundi ng temper atur e
is withi n specific ation
Adjust surrounding temperature
to speci fic ati on
Maybe AC motor drive has malfunction or
misoperation due to noise. Pleas e contact
DELTA.
If load is too lar ge
5.6 Overload
OL1/ OL2 OL
Reduce load or increase the power of AC motor drive
Check if the setting of electronic
thermal relay is suitable
Yes
Yes
No
No
Modify setting
If load is too large
Maybe AC motor drive has malfunction
or misoperation due to noise.