Over Heat (Oh); Overload - Delta VFD-B User Manual

Chapter 7 Troubleshooting |VFD-B Series

7.5 Over Heat (OH)

AC motor driv e overheats
Heat sink overheats
Check if temper atur e of heat si nk
is greater than 90
Is load too large
If cooling fan functions normally
Check if cooling fan is jammed
Check if sur roundi ng temper atur e
is withi n specific ation
Adjust surrounding temperature
to speci fic ati on

7.6 Overload

OL
Reduce load or increase the power of AC motor drive
7-4
O
C
Yes
Yes
No
No
Yes
Yes
No
No
OL1/ OL2
Check for correct settings at
Pr. 06-06 and 06-07
Yes
Is load too large
Yes
No
Temperature detection mal functions.
Please contac t DELTA.
Reduc e load
Change cooling fan
Remove obstruc tion
Maybe AC motor drive has malfunction or
Yes
misoperation due to noise. Pleas e contact
DELTA.
No
No Maybe AC motor drive has malfunction
or misoperation due to noise.
Revision July 2008, BE16, SW V4.08 & V5.00
Modify setting