6.3 Fault Detection
D i g i t a l O p e r a t o r D i s p l a y
F a u l t N a m e
O L
oC
Overcurrent
Drive sensors have detected an output current greater than the specified overcurrent level.
C a u s e
P o s s i b l e S o l u t i o n
The motor has been damaged due to overheating or the
motor insulation is damaged.
• Check the insulation resistance.
• Replace the motor.
One o f the motor cables has shorted out or there is a
grounding problem.
• Check the motor cables.
• R em ove the short circuit and reapply power to the drive.
• Check the resistance between the motor cables and the ground terminal (2).
• Replace damaged cables.
The load is too heavy.
• Measure the current flow ing into the motor.
• Replace the drive w ith a larger capacity drive if the current value exceeds the rated current.
• Determine if there is sudden fluctuation in the current level.
• Reduce the load to avoid sudden changes in the current level or switch to a larger drive.
A ccel/decel ramp is too fast.
Calculate the amount o f torque required for the desired acceleration and/or deceleration ramp relative to the inertia moment o f the
load.
If the drive is not capable o f producing that much torque in time, try the follow ing setting changes:
• Reduce the acceleration and/or deceleration ramp (i.e., increase the accel/decel time).
• U se a larger capacity drive.
The drive is attempting to operate a specialized motor or
a motor larger than the maximum size allowed.
•
Check the motor capacity.
•
Ensure that the rated capacity o f the drive is greater than or equal to the capacity rating found on the motor nameplate.
Magnetic contactor (MC) on the output side o f the drive
has turned on or off.
Set up the operation sequence so that the MC is not tripped w hile the drive is outputting current.
V /f setting is not operating as expected.
•
Check the ratios between the voltage and frequency.
• Set parameters E 1-04 through E 1-10 appropriately (E3-04 through E 3-10 for motor 2).
• Lower the voltage if it is too high relative to the frequency.
E xcessive torque compensation.
• Check the amount o f torque compensation.
• Reduce the torque compensation gain (C 4-01) until there is no speed loss and less current.
Drive fails to operate properly due to noise interference.
• R eview the possible solutions provided for handling noise interference.
• R eview the section on handling noise interference and check the control circuit lines, main circuit lines, and ground wiring.
The motor control method and motor do not match.
• Check which motor control method the drive is set to (A1-02).
• For IM motors, set A 1-02 = “0 ”, “2 ”, or “3 ”.
• For PM motors, set A 1-02 = “7”.
The rated output current o f the drive is too small
U se a larger drive.
D i g i t a l O p e r a t o r D i s p l a y
F a u l t N a m e
„ c o n n
O r n U U
oFA00
Option Card Connection Error at Option Connector CN5-A
Option compatibility error
C a u s e
P o s s i b l e S o l u t i o n
The option card installed into port C N5-A is
incompatible with the drive.
Check if the drive supports the option card to be installed. Contact Yaskawa for assistance.
A PG option card is connected to option port CN5-A
PG option cards are supported by option ports CN5-B and CN5-C only. Place the PG option card into the correct option port.
D i g i t a l O p e r a t o r D i s p l a y
F a u l t N a m e
oFRQ i
oFA01
Option Card Fault at Option Connector CN5-A
Option not properly connected
C a u s e
P o s s i b l e S o l u t i o n
The option board connection to port CN5-A is faulty.
• Turn the power o ff and reconnect the option card.
• Check if the option card is properly plugged into the option port. Make sure the card is fixed properly.
• If the option is not a communication option card, try to use the card in another option port. If the option card works properly in
a different option port, replace the drive because port C N5-A is damaged. If the error persists (oFb01 or oFC01 occur), replace
the option card.
D i g i t a l O p e r a t o r D i s p l a y
F a u l t N a m e
o F R 0 5
,
oFROB
oFA05, oFA06
Option card error occurred at option port CN5-A
oFR
/ 0 ,
oFR ! !
oFA10, oFA11
oFR
'<? to
о
FR 11
oFA12 to oFA17
oFR3u
to
oFR43
oFA30 to oFA43
C a u s e
P o s s i b l e S o l u t i o n
Option card or hardware is damaged.
• C ycle power to the drive.
• If the problem continues, replace the control board or the entire drive. Contact Yaskawa or a Yaskawa representative for
instructions on replacing the control board.
D i g i t a l O p e r a t o r D i s p l a y
F a u l t N a m e
_ C L Л П
o r o uu
oFb00
Option Card Fault at Option Port CN5-B
Option compatibility error
C a u s e
P o s s i b l e S o l u t i o n
The option card installed into port CN5-B is
incompatible with the drive.
Make sure the drive supports the option card to be installed. Contact Yaskawa for assistance.
A communication option card has been installed in
option port CN5-B.
Communication option cards are only supported by option port CN5-A. It is not possible to install more than one comm. option.
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YASKAWA ELECTRIC SIEP C710616 33D YASKAWA AC Drive L1000A Technical Manual