Delta 1.07 VFD-D D - Manual (Page 111)

Chapter 5 Troubleshooting |DD Series
5-6
5-5 Over Heat (oH1)
AC motor driv e overheats
H eat sink overheat s
C heck if temper atur e of heat si nk
is higher than 90
O C
N o
N o
N o
N o
Yes
Yes
Yes
Yes
Yes
R educ e load
N o
Temperature detection mal functions.
Please contac t D ELTA.
If cooling fan functions normally C hange cooling fan
C heck if cooling fan is jammed R emove obstruc tion
C heck if sur roundi ng t emper 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
D ELTA.
If load is too lar ge