Delta Electronics VFD-EL manual Over Heat OH1, Overload

Chapter 5 Troubleshooting

5.5 Over Heat (OH1)

AC motor drive ov erheats

Heat sink overheats

Chec k if temperature of heat sink is greater than 90 O C

No	Temperature detection malfunctions.
	Please c ontact D ELTA.

Yes

Is load too large

No

Yes

Reduce load

No

If cooling fan functions normally

Yes

Chec k if cooling f an is jammed

No

Chec k if surrounding temperature is within specification

No

Adjust surrounding temperature to specification

	Change cooling f an
Yes
	Remove obstruct ion
Yes		Maybe AC motor drive has malfunction or
		misoperation due to noise. Please contact
		DELTA .

5.6 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

5-4 Revision August 2008, 2ELE, V1.02