GE Industrial Solutions AF-600 FP High Power Unit Sizes 6x - Manual (Page 48)

4.5 Fault Symptoms
4.5.1 No Display
To troubleshoot no display:
Check that power is supplied.
Cycle power to the unit.
Restore the drive. (See section Tips and Tricks.)
4.5.2 Intermittent Display
Cutting out or flashing of the entire display and power LED indicates that the power supply (SMPS) is shutting down as a result of being overloaded. This may be
due to improper control wiring or a fault within the frequency converter itself.
The first step is to rule out a problem in the control wiring. To do this, disconnect all control wiring by unplugging the control terminal blocks from the control card.
If the display stays lit, then the problem is in the control wiring (external to the frequency converter). All control wiring should be checked for shorts or incorrect
connections.
If the display continues to cut out, follow the procedure for No Display as though the display were not lit at all.
High Power Service Manual for Unit Sizes 6x
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