YASKAWA P1000 Quick Start Manual page 137

Cause
An external device tripped an alarm function Remove the cause of the external fault and reset the fault.
Wiring is incorrect
Multi-function contact input setting is
incorrect
Digital Operator Display
Cause
Motor insulation is damaged
A damaged motor cable is creating a short
circuit
Excessive leakage current at the drive output
The drive started to run during a current offset
fault or while coasting to a stop
Hardware problem
Digital Operator Display
Cause
The output cable is disconnected
The motor winding is damaged
The output terminal is loose
YASKAWA ELECTRIC TOEP YAIP1U 01B YASKAWA AC Drive - P1000 Quick Start Guide
External Fault (input terminal S7)
EF7
External fault at multi-function input terminal S7.
External Fault (input terminal S8)
EF8
External fault at multi-function input terminal S8.
• Properly connect the signal lines to the terminals assigned for external fault detection
(H1-oo = 20 to 2B).
• Reconnect the signal line.
• Check for unused terminals set for H1-oo = 20 to 2B (External Fault).
• Change the terminal settings.
EEPROM Write Error
Err
Data cannot be written to the EEPROM
Internal Fan Fault
FAn
Fan or magnetic contactor failure
Excessive PID Feedback
FbH
PID feedback input is greater than the level set to b5-36 for longer than the time set to b5-37. Set b5-12
to 2 or 5 to enable fault detection.
PID Feedback Loss
FbL
PID feedback loss detection is programmed to trigger a fault (b5-12 = 2 or 5) and the PID feedback level
is below the detection level set to b5-13 for longer than the time set to b5-14.
Ground Fault
GF
• A current short to ground exceeded 50% of rated current on the output side of the drive.
• Setting L8-09 to 1 enables ground fault detection.
• Check the insulation resistance of the motor.
• Replace the motor.
• Check the motor cable.
• Remove the short circuit and reapply power to the drive
• Check the resistance between the cable and the ground terminal
• Replace the cable.
• Reduce the carrier frequency.
• Reduce the amount of stray capacitance.
• Set b3-01 to 1 to enable Speed Search at Start.
• Perform Speed Search 1 or 2 (H1-oo = 61 or 62) via one of the external terminals.
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.
Output Phase Loss
LF
• Phase loss on the output side of the drive.
• Setting L8-07 to 1 or 2 enables Phase Loss Detection.
• Check for wiring errors and properly connect the output cable.
• Correct the wiring.
• Check the resistance between motor lines.
• Replace the motor if the winding is damaged.
• Apply the tightening torque specified in this manual to fasten the terminals.
Wire Gauges and Tightening Torque on page 57
Possible Solution
Fault Name
Possible Solution
.
Fault Name
Possible Solution
for details.
5.2 Fault Detection
5
Refer to Main Circuit
137