YASKAWA GA500 Serie Installations- Und Bedienungansleitung Seite 27

Refer to the technical manual for a complete list of all faults and alarms.
Code Name
bb Baseblock
CrST Cannot Reset
FWD/REV Run
EF
Command Input Error
External Fault
EF1 - EF7
(Terminal Sx)
GF Ground Fault
oC Overcurrent
oL1 Motor Overload
YASKAWA TOMPC71061753A YASKAWA AC Drive GA500 Installation and Operation Instruction
Causes
An external baseblock command
was entered through one of the
MFDI terminals Sx, and the drive
output stopped as shown by an
external baseblock command.
The drive received a fault reset
command when a Run command
was active.
A forward command and a reverse
command were input at the same
time for longer than 0.5 s.
MFDI terminal Sx caused an
external fault through an external
device.
External Fault [H1-xx = 20 to 2B]
is set to MFDI terminal, but the
terminal is not in use.
Overheating caused damage to the
motor or the motor insulation is
not satisfactory.
The motor main circuit cable is
contacting ground to make a short
circuit.
An increase in the stray
capacitance of the cable and the
ground terminal caused an
increase in the leakage current.
There was a problem with the
drive hardware.
• The motor main circuit cable is
contacting ground to make a
short circuit.
• The load is too large.
• The acceleration time is too
short.
• The V/f pattern settings are
incorrect.
• The motor data is incorrect.
• A magnetic contactor was
switched at the output.
The motor load is too large.
The drive is operating a general-
purpose motor with a high load at
lower speed than the rated speed.
Possible Solutions
Examine the external sequence and timing
of the baseblock command input.
Turn off the Run command then de-energize
and re-energize the drive.
Examine the forward and reverse command
sequence and correct the problem.
• Remove the cause of the external fault to
clear the external fault input in the
MFDI.
• Correctly set the MFDI.
Measure the motor insulation resistance, and
replace the motor if there is electrical
conduction or unserviceable insulation.
• Examine the motor main circuit cable for
damage, and repair short circuits.
• Measure the resistance between the
motor main circuit cable and the ground
terminal. If there is electrical conduction,
replace the cable.
• If the wiring length of the cable is more
than 100 m, decrease the carrier
frequency.
• Decrease the stray capacitance.
Replace the control board or the drive. For
information about replacing the control
board, contact Yaskawa or your nearest sales
representative.
• Replace damaged output cables or motor
cables.
• Repair damaged devices.
• Make sure that the parameter settings are
correct.
• Make sure that the sequence of the
electromagnetic contactor on the drive
output side is correct.
Decrease the motor load.
Use a motor with an external cooling fan
and set the correct motor type to L1-01
[Motor Overload (oL1) Protection].
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