YASKAWA GA700 Technical Manual page 301

Code Name
EF8 External Fault (terminal S8) The multi-function digital input terminal
Note:
If detected, H2-xx = 10 [MFDO Function Select = Minor Fault] will be ON.
Code Name
EP24v External Power 24V Supply The voltage of the main circuit power
Note:
A minor fault signal will not be output even if the drive detects this alarm.
Code Name
FAn Internal Fan Fault
Note:
If detected, H2-xx = 10 [MFDO Function Select = Minor Fault] will be ON.
Code Name
FbH Excessive PID Feedback
Note:
• Detected if PID feedback input has exceeded the level set in b5-36 [PID Feedback High Detection Lvl] for longer than b5-37 [PID
Feedback High Detection Time].
• If detected, H2-xx = 10 [MFDO Function Select = Minor Fault] will be ON.
• If detected, the drive will operate the motor according to the stop method set in b5-12 [Feedback Loss Detection Select].
Code Name
FbL PID Feedback Loss
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
Cause
S8 triggered an external fault via an
external device.
The wiring is incorrect.
External fault [H1-08 = 2C to 2F] is
assigned to MFDI terminal S8 that is not
in use.
Cause
supply dropped, and power is being
supplied to the drive from the external
24 V power supply.
Cause
The circulation fan has malfunctioned.
A fault detected in the power supply of
the electromagnetic contactor and the
circulation fan.
Cause
The FbH detection level has not been
set appropriately.
The PID feedback wiring is faulty.
Feedback sensor has malfunctioned.
A fault occurred in the feedback input
circuit of the drive.
Cause
The FbL detection level has not been set
appropriately.
The PID feedback wiring is faulty.
Feedback sensor has malfunctioned.
6.5 Minor Faults/Alarms
Possible Solution
1. Identify the device that triggered the external
faults and remove the cause.
2. Clear the external fault input in the multi-
function digital input.
Connect the signal line to multi-function digital
input terminal S8 properly.
Set the multi-function digital input properly.
Possible Solution
• Check the main circuit power supply.
• To run the drive, switch on the main circuit
power supply.
Possible Solution
• Check for circulation fan operation.
• Restart the drive and check if the fault still
remains.
• Check U4-03 [Cooling Fan Ope Time] and U4-
04 [Cool Fan Maintenance]. If the circulation
fan has exceeded its expected performance life
or is damaged in any other way, follow the
replacement instructions in this manual.
• Re-energize the drive and check if the fault still
remains.
• Replace either the control board or the entire
drive if the fault continues. For instructions on
replacing the control board, contact Yaskawa or
your nearest sales representative.
Possible Solution
Adjust b5-36 and b5-37.
Correct any PID control wiring errors.
Check the state of the sensors on the control device
side.
Replace the board or the entire drive. For
instructions on replacing the control board, contact
Yaskawa or your nearest sales representative.
Possible Solution
Adjust b5-13 and b5-14.
Correct any PID control wiring errors.
Check the state of the sensors on the control device
side.
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