Delta Electronics 115V Series, 230V Series, 460V Series manual Over Heat OH, Overload

Chapter 7 Troubleshooting VFD-S Series

7.5 Over Heat (OH)

AC motor drive overheats

Heat sink overheats

Check if temperature of heat sink No is greater than 90 OC

Yes

Temperature detection malfunctions. Please contact DELTA.

Is load too large		Yes		Reduce load
	No
			No
If cooling fan functions normally
					Change cooling fan
	Yes
			Yes		Remove obstruction
Check if cooling fan is jammed
	No
Check if surrounding temperature				No		Maybe AC motor drive has malfunction or
is within specification						misoperation due to noise. Please contact
						DELTA.
	Yes
Adjust surrounding temperature
to specification

7.6 Overload

OL

OL1/ OL2

Check for correct settings at Pr. 06-06 and 06-07

	Yes
		No
Is load too large
	Yes

No Modify setting

Maybe AC motor drive has malfunction or misoperation due to noise.

Reduce load or increase the power of AC motor drive

7-4 Revision August 2006, SE08, SW V2.61