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7 Troubleshooting
7 Troubleshooting
u Drive-Side Error Codes
Table 13
lists the various fault codes related to the option and pulse generator. Refer to the drive Technical Manual for further details on fault codes.
Confirm the following items upon receiving an error notification on the drive keypad:
1. Correct and secure cable connections including ground wiring.
2. Proper option installation.
3. No momentary power loss occurred.
Table 13 Fault Displays, Causes, and Possible Solutions
Keypad Display dEv
Cause
The load is too heavy.
The acceleration and deceleration times are set too short or too long.
The load is locked up.
Parameters are set inappropriately.
Motor brake is engaged.
Brake control sequence is incorrect.
Keypad Display
Fault Name
Speed Deviation (for Control Mode with PG)
The deviation between the speed reference and speed feedback is greater than the setting in F1-10 for longer than the time set to F1-11.
Possible Solution
Reduce the load.
Increase or decrease the acceleration and deceleration times (C1-01 through
C1-08).
Check the machine.
Check F1-10 and F1-11 settings.
Ensure the motor brake releases properly.
Correct the brake control sequence and verify that the brake is released.
dv3
Cause
E5-11 is not set properly.
The PG encoder is replaced or rotational direction for the motor is changed.
Fault Name
Inversion Detection
• Torque reference and acceleration are in opposite directions.
• The speed reference and actual motor speed differ by over 30% for the number of pulses set to parameter F1-18.
Possible Solution
Set the value for Δθ to E5-11 as specified on the motor nameplate.
Perform the Z-pulse Offset Tuning (T2-01 = 3).
An external force on the load side caused the motor to move.
• Make sure the motor is rotating in the proper direction.
• Investigate problems on the load side causing motor rotation in the opposite direction and counteract the problem.
46 YASKAWA ELECTRIC TOBP C730600 77B YASKAWA AC Drive Option PG-F3 Installation Manual
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7 Troubleshooting
Noise interference along the encoder cable is affecting the A channel or B channel.
The encoder is disconnected or is not wired properly.
The encoder rotational direction set to F1-05 is in the opposite direction of the motor wiring.
The PG option or PG encoder is damaged.
Keypad Display
1. Confirm that the PG encoder is properly connected and all shielded lines are properly grounded.
2. Cycle power. Replace the PG option card or the PG encoder if the problem continues after cycling power.
Make sure motor wiring for each phase (U, V, W) is connected properly.
Cause dv4
An external force on the load side caused the motor to move.
E5-11 is not set properly.
The PG encoder is replaced or rotational direction for the motor is changed.
Noise interference along the encoder cable is affecting the A or B phase.
Encoder is disconnected or is not wired properly, or the PG option or the encoder are damaged.
The PG option or PG encoder is damaged.
Keypad Display
If the problem continues after correcting wiring and cycling power, replace the PG option or the PG encoder.
Fault Name
Inversion Prevention Detection
Pulses indicate that the motor is rotating in the opposite direction of the speed reference. Set the number of pulses to trigger inverse detection to F1-19.
Note: Set F1-19 = 0 to disable inverse detection in applications where the motor may rotate in the opposite direction of the speed reference and avoid nuisance faults.
Possible Solution
• Confirm that the motor is rotating in the proper direction.
• Investigate problems on the load side causing motor rotation in the opposite direction and counteract the problem.
Set the value for Δθ to E5-11 as specified on the motor nameplate.
Perform the Z-pulse Offset Tuning (T2-01 = 3).
Check encoder wiring and make sure all wiring including shielded wiring is properly connected.
Check PG encoder wiring and confirm that all wiring, including shielded wiring, is properly connected.
If the problem continues after correcting wiring and cycling power, replace the PG option or the PG encoder.
Fault Name oFA00 Non-compatible option is connected to drive port CN5-A.
Cause
The option card installed into port CN5-A is incompatible with the drive.
Possible Solution
Use only compatible options. The PG option cannot be connected to CN5-A.
For other options, refer to the Installation Manual for that option.
YASKAWA ELECTRIC TOBP C730600 77B YASKAWA AC Drive Option PG-F3 Installation Manual 47
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7 Troubleshooting
Keypad Display oFb00
Fault Name
Non-compatible option is connected to drive port CN5-B.
Cause
The option card installed into port CN5-A is incompatible with the drive.
Keypad Display
Possible Solution
Connect the option to the correct option port.
Note: When connecting DO-A3, AO-A3, PG-B3, or PG-X3, use CN5-B. When connecting only one PG option, use CN5-C.
Fault Name oFC01 Option Connection Error at drive port CN5-C
Cause
Option at drive port CN5-C was changed during run.
Keypad Display
Possible Solution
De-energize the drive and plug the option into the drive according to Installation
Procedure on Page
12
.
Fault Name
Cause oFC50
The option is damaged.
Keypad Display
PG Encoder Option A/D Conversion Error
Error with the A/D conversion level (VCC level), or A/D conversion timed out.
Possible Solution
Replace the option.
Fault Name
PG Encoder Option Analog Circuit Error
Cause oFC51
The option is damaged.
Keypad Display
Incorrect signal level (+2.5 V signal)
Possible Solution
Replace the option.
Fault Name
PG Encoder Communication Timeout oFC52
Cause
Encoder wiring is incorrect.
Serial encoder timed out waiting to receive data
Correct the wiring.
Possible Solution
Encoder cable is disconnected.
Reconnect the cable.
F1-50 (Encoder selection) is incorrect.
Keypad Display
Set F1-50 (Encoder selection) according to the encoder connected to the drive.
Fault Name oFC53
PG Encoder Communication Data Error
Serial encoder CRC checksum error
Possible Solution Cause
Encoder wiring is incorrect.
Correct the wiring.
Encoder cable is disconnected.
Reconnect the cable.
48 YASKAWA ELECTRIC TOBP C730600 77B YASKAWA AC Drive Option PG-F3 Installation Manual
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7 Troubleshooting
Keypad Display oFC54
Fault Name
PG Encoder Error
Alarm reading EnDat absolute position data from the encoder
(OR flag from EnDat error for overvoltage, undervoltage, etc.)
Possible Solution Cause
Power supply to encoder is wired incorrectly.
PG-F3 power supply circuit is damaged.
Keypad Display
Correct the wiring.
Replace the option.
Cause
Overshoot is occurring.
oS
Fault Name
Overspeed
The motor speed feedback exceeded the F1-08 setting.
Possible Solution
• Increase the settings for C5-01 (Speed Control Proportional Gain 1) and reduce
C5-02 (Speed Control Integral Time 1).
• Adjust the input signal using parameters H6-02 through H6-05.
• Enable Feed Forward Control and perform Inertia Auto-Tuning in CLV.
Incorrect speed feedback scaling when terminal RP is used as speed feedback input in V/f control.
Set H6-02 to the value of the speed feedback signal frequency when the motor runs at the maximum speed.
Inappropriate parameter settings.
Keypad Display
PGo
Check the setting for the overspeed detection level and the overspeed detection time (F1-08 and F1-09).
Fault Name
PG Encoder Disconnected
The drive has not received a PG encoder pulse for longer than the time set in
F1-14.
Possible Solution Cause
The encoder is disconnected or is not wired properly.
Make sure the encoder is properly wired or is not disconnected.
The encoder does not have enough power.
Motor brake is engaged.
Confirm that the correct power supply is properly connected to the PG encoder.
Keypad Display
Correct the brake control sequence and verify that the brake has been released.
Fault Name
PG Encoder Hardware Fault
PGoH
PG encoder cable is disconnected.
Cause
Encoder cable is disconnected.
Reconnect the cable.
Possible Solution
YASKAWA ELECTRIC TOBP C730600 77B YASKAWA AC Drive Option PG-F3 Installation Manual 49
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7 Troubleshooting
Table 14 Operation Error Displays, Causes, and Possible Solutions
Keypad Display
Cause
Parameters were set outside the possible range.
oPE02
Fault Name
Parameter Range Setting Error
Use U1-18 to find parameters set outside range.
Possible Solution
Set parameters to the proper values.
Note: When multiple errors occur simultaneously, other errors are given precedence over oPE02.
Fault Name Keypad Display oPE06
Control Method Selection Error
Correct the setting for the control method.
Possible Solution Cause
Control method requires installing a PG option, but no PG option is installed (A1-02 = 1, 3, or 7).
• Connect a PG option.
• Correct the value set to A1-02.
50 YASKAWA ELECTRIC TOBP C730600 77B YASKAWA AC Drive Option PG-F3 Installation Manual
