Chapter 5 Troubleshooting 
5.5 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 |
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If cooling fan functions normally |
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Check if cooling fan is jammed |
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Check if surrounding temperature | No |
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is within specification |
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| misoperation due to noise. Please contact | |||
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Adjust surrounding temperature |
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to specification |
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5.6 Overload
OL |
| OL1/ OL2 |
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| Pr. |
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| Yes |
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| Is load too large | ||||
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No | Modify setting |
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Maybe AC motor drive has malfunction 
or misoperation due to noise.
Reduce load or increase the power of AC motor drive
Revision July 2008, EG03, SW V1.06 |
