7.7 Keypad Display is Abnormal
Abnormal display or no display
Yes
Cycle power to AC motor drive
Display normal? | No |
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Yes
AC motor drive works normally
Chapter 7 Troubleshooting
Fix connector and eliminate noise
No
Check if all connectors are connect correctly and no noise is present
Yes
AC motor drive has malfunction.
Please contact DELTA.
7.8 Phase Loss (PHL)
| Phase loss |
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| No | |
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Check wiring at R, S and T terminals | |||||
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| Yes |
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Correct wiring
Check if the screws of terminals are tightened | No |
| Tighten all screws | |
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| Yes |
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Check if the input voltage of R, S, T is unbalanced
No
Yes
Please check the wiring and power system for abnormal power
Maybe AC motor drive has malfunction or misoperation due to noise. Please contact DELTA.
Revision August 2006, SE08, SW V2.61 |
