Delta VFD-A, User Manual

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Fault Name Fault Descriptions Corrective Actions
AC drive E
2
PROM contains
invalid data or can not be
programmed.
Check the connections between the main
control board and the power board.
Reset drive to factory defaults.
Ground fault or fuse failure:
Ground fault :
The AC drive output is
abnormal. When the output
terminal is grounded (short
circuit current is 50% more
than the AC drive rated
current), the AC drive power
module may be damaged.
The short circuit protection is
provided for the AC drive
protection, not user
protection.
Ground fault :
1. Check whether the IGBT power module is
damaged.
2. Check for possible poor insulation at the
output line.
Fuse failure:
The fuse failure information
will be displayed by the LED
located on the power board. Fuse failure:
1. Replace Fuse.
2. Check whether the IGBT power module is
damaged.
3. Check for possible poor insulation at the
output line.
External baseblock.
AC drive output is turned off. When the multi-function input 1 (2, 3)-DCM
terminal goes from OFF to ON, the AC drive
output will be turned off.
Drive’s internal circuitry
abnormal. Switch off power supply. Check whether the
input voltage falls within the rated AC drive
input voltage. Switch on the AC drive.
Protection circuitry of
hardware detected abnormal
operation. Remove power from the AC drive and then
restore power. If H.P.F. fault appears again, the
AC drive should be returned for service.