YASKAWA FP65U T Series Installation & Primary Operation page 97

Code Name
CrST Cannot Reset
CyPo Cycle Power to Accept Changes
dEv Speed Deviation
DIFF Differential Feedback Exceeded
dnE Drive Disabled
DS De-Scale/De-Rag Active
FWD/REV Run Command Input
EF
Error
EF0 Option Card External Fault
EF1 to EF8 External Fault (Terminal Sx)
EOF Emergency Override FWD
EOR Emergency Override REV
EP24v External Power 24V Supply
FDBKL Feedback Loss Wire Break
FLGT Feedback Loss, Go To Freq b5-83
FR<MS Freq Ref < Minimum Speed (Y1-06)
YASKAWA TOEPC7106171GA FP605 Drive Installation & Primary Operation
Causes
The controller software or hardware is causing a
communication problem.
The drive received a fault reset command when a Run
command was active.
Although F6-15 = 1 [Comm. Option Parameters
Reload = Reload Now], the drive does not update the
communication option parameters.
The load is too heavy
The difference between the PID Feedback and
Differential Level Source [H3-xx = 2D] is more than
the level set in Y4-18 [Pre-Charge Loss of Prime
Level 2] for the time set in Y4-19 [Differential Lvl
Detection Time].
A terminal set for H1-xx = 6A [MFDI Function
Selection = Drive Enable] deactivated.
The terminal is set to H2-xx = C5 or 1C5 [MFDO
Function Selection De-Scale or !De-Scale] and the
set length of run time elapsed.
The drive received a forward command and a reverse
command at the same time for longer than 0.5 s.
The communication option card received an external
fault from the controller.
MFDI terminal Sx caused an external fault through an
external device.
The wiring is incorrect.
External Fault [H1-01 = 2C to 2F] is set to MFDI
terminal Sx, but the terminal is not in use.
The digital input terminal set to H1-xx = AF [MFDI
Function Selection = Emergency Override FWD]
activated.
The digital input terminal set to H1-xx = B0 [MFDI
Function Selection = Emergency Override REV]
activated.
The voltage of the main circuit power supply
decreased, and the 24 V power supply is supplying
power to the drive.
The analog input from the terminal set to H3-xx = B
[MFAI Function Selection = PID Feedback ] is more
than 21 mA or less than 3 mA for longer than 1 s in
these conditions:
• b5-82 = 1 [Feedback Loss 4～20mA Detect Sel =
Alarm Only]
• b5-01 ≠ 0 [PID Mode Setting ≠ Disabled]
• H3-01, H3-09, or H3-05 = 2 [Terminal A1/A2/A3
Signal Level Selection = 4 to 20 mA]
The analog input from the terminal set to H3-xx = B
[MFAI Function Selection = PID Feedback ] is more
than 21 mA or less than 3 mA for longer than 1 s in
these conditions:
• b5-82 = 3 [Feedback Loss 4～20mA Detect Sel =
Run At b5-83]
• b5-01 ≠ 0 [PID Mode Setting ≠ Disabled]
• H3-01 or H3-09 = 2 [Terminal A1/A2 Signal Level
Selection = 4 to 20 mA]
The drive frequency reference setting is less than the
value set in Y1-06 [Minimum Speed] in these
conditions:
• The drive is not in PI Mode
• The drive is running
• Minimum Speed is enabled (Y1-06 > 0.00)
• Y1-06 > Y4-12 [Thrust Frequency]
20 Troubleshooting
Possible Solutions
Examine the controller and remove the cause of the problem.
Turn off the Run command then de-energize and re-energize the
drive.
Re-energize the drive to update the communication option
parameters.
Decrease the load.
• Replace the feedback transducer or transducers.
• Set Y4-18 and Y4-19 correctly.
Examine the operation sequence.
• If you do not want to do De-Scale/De-Rag, set Y8-01 = 0 [De-
Scale Operation Selection = Disabled].
• Adjust the Y8-08 [Run Time before De-Scale] setting.
Examine the forward and reverse command sequence and correct
the problem.
1. Find the device that caused the external fault and remove the
cause.
2. Clear the external fault input from the controller.
1. Find the device that caused the external fault and remove the
cause.
2. Clear the external fault input in the MFDI.
Correctly connect the signal line to MFDI terminal Sx.
Correctly set the MFDI.
When the emergency condition is gone, deactivate the digital input
set to Emergency Override FWD.
When the emergency condition is gone, deactivate the digital input
set to Emergency Override REV.
• Examine the main circuit power supply.
• Turn ON the main circuit power supply to run the drive.
Make sure that you install the PID feedback source and it operates
correctly.
Make sure that you install the PID feedback source and it operates
correctly.
Increase the frequency reference to a value more than Y1-06.
97