Chapter 5 Troubleshooting|VFD-VL
5-4
5.5 Over Heat (OH)
AC motor drive overheats
Heat sink overheats
Check if temperature of heat sink
is larger than 90
O
C
No
No
No
No
Ye s
Yes
Yes
Yes
Yes
Reduce load
No
Temperature detection malfunctions.
Please con t ac t D ELTA.
If cooling fan functions normally
Change cooling fan
Check if cooling fan is jammed
Remove obstruction
Check if surrounding temperature
is within specification
Adjust surrounding temperature
to specification
Maybe AC motor drive has malfunction or
misoperation due to noise. Please contact
DELTA.
If load is too large
5.6 Overload
EoL1/ot1
Overload
Reduce load or increase the power of AC motor drive
Check if the setting of electronic
thermal relay is suitable
Yes
Ye s
No
No
Modify setting
If load is too large
Maybe AC motor drive has malfunction
or misoperation due to noise.
Call 1(800)985-6929 for Sales
Call 1(800)985-6929 for Sales
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