6.5 Minor Faults/Alarms
366 YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual
Code Name Causes Possible Solutions
External Fault [H1-06 = 2C to 2F] is
set to MFDI terminal S6, but the
terminal is not in use.
Correctly set the MFDI.
Note:
If the drive detects this error, the terminal assigned to H2-01 to H2-03 = 10 [MFDO Function Select = Alarm] will be ON.
Code Name Causes Possible Solutions
EF7 External Fault (Terminal
S7)
MFDI terminal S7 caused an external
fault through an external device.
1. Find the device that caused the external fault
and remove the cause.
2. Clear the external fault input in the MFDI.
The wiring is incorrect. Correctly connect the signal line to MFDI terminal
S7.
External Fault [H1-07 = 2C to 2F] is
set to MFDI terminal S7, but the
terminal is not in use.
Correctly set the MFDI.
Note:
If the drive detects this error, the terminal assigned to H2-01 to H2-03 = 10 [MFDO Function Select = Alarm] will be ON.
Code Name Causes Possible Solutions
EF8 External Fault (Terminal
S8)
MFDI terminal S8 caused an external
fault through an external device.
1. Find the device that caused the external fault
and remove the cause.
2. Clear the external fault input in the MFDI.
The wiring is incorrect. Correctly connect the signal line to MFDI terminal
S8.
External Fault [H1-08 = 2C to 2F] is
set to MFDI terminal S8, but the
terminal is not in use.
Correctly set the MFDI.
Note:
If the drive detects this error, the terminal assigned to H2-01 to H2-03 = 10 [MFDO Function Select = Alarm] will be ON.
Code Name Causes Possible Solutions
EP24v External Power 24V Supply The voltage of the main circuit power
supply decreased, and the 24 V power
supply is supplying power to the drive.
• Examine the main circuit power supply.
• Turn ON the main circuit power supply to run
the drive.
Note:
• Set o2-26 [Ext. Power 24V Supply Display] to enable or disable EP24v detection.
• The drive will not output an alarm signal for this alarm.
Code Name Causes Possible Solutions
FAn Internal Fan Fault The circulation fan stopped operating
correctly.
• Examine circulation fan operation.
• Re-energize the drive.
• Check U4-03 [Cooling Fan Ope Time] and U4-
04 [Cool Fan Maintenance]. If the performance
life of the circulation fan is expired or if there is
damage to the fan, replace the fan.
There is a problem with the power
supply of the electromagnetic contactor
and the circulation fan.
1. Re-energize the drive.
2. If the fault stays, replace the control board or
the drive. For information about replacing the
control board, contact Yaskawa or your nearest
sales representative.
Note:
If the drive detects this error, the terminal assigned to H2-01 to H2-03 = 10 [MFDO Function Select = Alarm] will be ON.
Code Name Causes Possible Solutions
FbH Excessive PID Feedback The FbH detection level is set
incorrectly.
Adjust b5-36 [PID High Feedback Detection Lvl]
and b5-37 [PID High Feedback Detection Time].
There is a problem with the PID
feedback wiring.
Correct errors with the PID control wiring.
The feedback sensor is not operating
correctly.
Examine the sensors on the control device side.
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