Ac Motor Drive Internal; Ac Motor Drive E2Prom; Ground Fault Or Fuse Failure; External Baseblock - Danfoss 176F7300 Manual

Possible Faults
c.F.I AC motor drive internal
circuitry failure.
c.F.2 AC motor drive E2PROM
contains invalid data or can not be
programmed.
c.F.3 Internal drive internal circuitry
abnormal.
G.F.F. Ground fault or fuse failure:
Ground fault :
The AC drive output is abnormal.
When the output terminal are
grounded (short circuit current is
50% higher than the AC drive rated
current), the AC drive power module
may be damaged. The short circuit
protection is provided for the AC
drive, not the user.
Fuse failure:
A fuse failure will be displayed by the
LED on the power board.
b.b. External baseblock.
AC drive output is turned off.
c.F.A Auto acceleration/decel-
eration adjustment mode fault
VLT
Corrective Actions
1. Switch off power supply.
2. Check the AC line voltage to insure it falls
within the rated AC drive input voltage.
3. Switch power to the AC drive back on.
Check the connections between the main
control board and the power board.
Reset drive to factory defaults (refer to Pr.76).
Switch off power supply. Check the AC line
voltage to insure it falls within the rated AC drive
input voltage. Switch power back on.
Ground fault :
1. Check the IGBT power module for damage.
2. Check for possible poor conductor insulation
on the output lines.
Fuse failure:
1. Replace Fuse.
2. Check the IGBT power module for damage.
3. Check for possible poor insulation at the
output line.
When the multi-function input 1 (2, 3)-DCM
terminal goes from OFF to ON, the AC drive
output will be turned off.
Check the motor output power to insure it
corresponds to the AC drive output power.
Check the AC line voltage to insure it falls within
the rated AC drive input voltage.
Sudden increase in motor loading.
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® MICRO