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
E r r
Err
EEPROM Write Error
Data cannot be written to the EEPROM.
C a u s e
P o s s ib le S o l u t i o n
N oise has corrupted data w hile writing to the EEPROM.
• Press
J
.
• Correct the parameter setting.
• Cycle power to the drive. R efer to D ia g n o sin g a n d R esettin g F au lts on p a g e 2 6 6 .
• 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.
Hardware problem.
• 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
F r i
FrL
Speed Reference M issing
Parameter d1-18 is set to 3, leveling speed detection is not assigned to a digital input (Н 1 -П П Ф 53) and no speed was selected
w hile an Up or D ow n command was entered.
C a u s e
P o s s ib le S o l u t i o n
Parameter d1-18 is set to 1, Н 1 -П П is not set to 53 and
no speed was selected at start.
• Make sure the selected speed selection method matches the elevator controller sequence. Check parameter d1 -18 and Н 1 -П П
settings.
• Make sure the elevator controller is connected properly.
• Make sure the elevator controller selects the speed properly.
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
OF
GF
Ground Fault
• A current short to ground exceeded 50% o f rated current on the output side o f the drive.
• Setting L8-09 to 1 enables ground fault detection.
C a u s e
P o s s ib le S o l u t i o n
Motor insulation is damaged.
• Check the insulation resistance o f the motor.
• Replace the motor.
A damaged motor cable is creating a short circuit.
• Check the motor cable.
• Rem ove the short circuit and turn the power back on.
• Check the resistance betw een the cable and the ground terminal ( J ) .
• Replace the cable.
The leakage current at the drive output is too high.
• Reduce the carrier frequency.
• Reduce the amount o f stray capacitance.
The drive started to run during a current offset fault or
w hile coasting to a stop.
The value set exceeds the allowable setting range w hile the drive automatically adjusts the current offset (this happens only when
attempting to restart a PM motor that is coasting to stop).
Hardware problem.
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
LF
LF
Output Phase Loss
• Phase loss on the output side o f the drive.
• Setting L 8-07 to 1 or 2 enables Phase Loss Detection.
C a u s e
P o s s ib le S o l u t i o n
The output cable is disconnected.
• Check for wiring errors and properly connect the output cable.
• Correct the wiring.
The motor winding is damaged.
• Check the resistance betw een motor lines.
• Replace the motor if the winding is damaged.
The output terminal is loose.
• Apply the tightening torque specified in this manual to fasten the terminals. R efer to W ire S ize on p a g e 6 4 .
The rated current o f the motor being used is less than 5%
o f the drive rated current.
Check the drive and motor capacities.
A n output transistor is damaged.
I f the problem continues, replace the control board or the entire drive. Contact Yaskawa or a Yaskawa representative for
instructions on replacing the control board.
A single-phase motor is being used.
The drive cannot operate a single phase motor.
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
i f
г
LF2
Output Current Imbalance (detected when L 8-29 = 1)
One or more o f the phases in the output current is lost.
C a u s e
P o s s ib le S o l u t i o n
Phase loss has occurred on the output side of the drive.
• Check for faulty wiring or poor connections on the output side o f the drive.
• Correct the wiring.
Terminal wires on the output side of the drive are loose.
Apply the tightening torque specified in this manual to fasten the terminals. R efer to W ire S iz e on p a g e 64.
The output circuit is damaged.
I f the problem continues, replace the control board or the entire drive. Contact Yaskawa or a Yaskawa representative for
instructions on replacing the control board.
Motor impedance or motor phases are uneven.
• Measure the line-to-line resistance for each motor phase. Ensure all values are the same.
• Replace the motor.
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YASKAWA ELECTRIC SIEP C710616 33D YASKAWA AC Drive L1000A Technical Manual
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