5.4 Fault Detection
124 YASKAWA ELECTRIC EZZ010928 FSDrive-MV1000 Instructions
Digital Operator Display Fault Name
IOV
Input Overvoltage
The main circuit's power supply voltage has exceeded the setting in L2-41 in longer than
the time set to L2-42.
Cause Possible Solution
Excessive rise of the power supply voltage
⇒Check if an appropriate power supply is used.
⇒Take measures to adjust the power supply voltage of the main circuit (for example,
changing the taps of the transformer).
⇒ Change the setting (L2-41) to appropriate value.
⇒If detection is faulty, replace the isolation board, which detects the power supply voltage
of the main circuit, or the control board.
Digital Operator Display Fault Name
LF
Output Phase Loss
Phase loss on the output side of the drive.
Phase Loss Detection is enabled when L8-07 is set to 1 or 2.
Cause Possible Solution
The output cable is disconnected.
Check for wiring errors and ensure the output cable is connected properly.
⇒Correct the wiring.
The motor winding is damaged.
Check the resistance between 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.
⇒Retighten the terminals to the tightening torques specified in this manual (refer to page
64).
The rated current of the motor being used is
less than 5% of the drive rated current.
Check the motor capacities.
An output transistor is damaged.
⇒Replace the board. For instructions on replacing it, contact Yaskawa or your nearest sales
representative.
Digital Operator Display Fault Name
LIN
nn LINK FAULT
CCB-MB Communication Error (Link Fault)
No response has not been returned within 1 ms or longer in the communication cycle.
Cause Possible Solution
Optical fiber cable fault ⇒Replace the optical fiber cable.
Fault of the cell control board or control board
(CCB)
⇒Replace the cell control board (CCB).
⇒Replace the control board.
Digital Operator Display Fault Name
oFA00 Option Card Fault at Option Port CN5-A
Cause Possible Solution
The option card installed into port CN5-A is
incompatible with the drive.
⇒ Connect the option card properly.
<2>
Digital Operator Display Fault Name
oFA01 Option Card Error Occurred at Option Port CN5-A
Cause Possible Solution
The option board connection to port CN5-A is
faulty.
⇒Turn the control power off and reconnect the option card. Check if the option card is
properly plugged into the option port.
Digital Operator Display Fault Name
oFA02
Option Card Error Occurred at Option Port CN5-A
Cause Possible Solution
The same or similar option cards are installed
in ports CN5-A, B, and C.
⇒ Connect the option card properly.
<2>
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