Troubleshooting
7
7.5 Minor Faults/Alarms
SIEPYEUOQ2A01G AC Drive Q2A Technical Manual 289
Code Name Causes Possible Solutions
External Fault [H1-07 = 2C to 2F] is set to MFDI
terminal DI7, but the terminal is not in use.
Correctly set the MFDI.
Note:
If the drive detects this error, the terminal assigned to H2-01, H2-02, and H2-03 = 4 [Multi-Function Digital Output 1, Multi-Function Digital Output 2, and Multi-Function
Digital Output 3 = Alarm] will be ON.
Code Name Causes Possible Solutions
EF8 External Fault (Terminal DI8)
MFDI terminal DI8 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 DI8.
External Fault [H1-08 = 2C to 2F] is set to MFDI
terminal DI8, but the terminal is not in use.
Correctly set the MFDI.
Note:
If the drive detects this error, the terminal assigned to H2-01, H2-02, and H2-03 = 4 [Multi-Function Digital Output 1, Multi-Function Digital Output 2, and Multi-Function
Digital Output 3 = 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 [Ext24V Mode Warning 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 [Fan Oper.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 the
manufacturer or your nearest sales representative.
Note:
If the drive detects this error, the terminal assigned to H2-01, H2-02, and H2-03 = 4 [Multi-Function Digital Output 1, Multi-Function Digital Output 2, and Multi-Function
Digital Output 3 = Alarm] will be ON.
Code Name Causes Possible Solutions
FbH Excessive PID Feedback
The FbH detection level is set incorrectly. Adjust b5-36 [PID HiHi Limit Level] and b5-37 [PID HiHi
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.
A fault occurred in the feedback input circuit of the
drive.
Replace the control board or the drive. For information about
replacing the control board, contact the manufacturer or your
nearest sales representative.
Note:
• The drive detects this fault if the PID feedback input is more than the level set in b5-36 for longer than b5-37.
• If the drive detects this error, the terminal assigned to H2-01, H2-02, and H2-03 = 4 [Multi-Function Digital Output 1, Multi-Function Digital Output 2, and Multi-Function
Digital Output 3 = Alarm] will be ON.
• If the drive detects this fault, it will operate the motor as specified by the stop method set in b5-12 [Fdback Loss Select Mode].
Code Name Causes Possible Solutions
FbL PID Feedback Loss
The FbL detection level is set incorrectly. Adjust b5-13 [Fdback Loss Lvl] and b5-14 [Fdback Loss 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.
A fault occurred in the feedback input circuit of the
drive.
Replace the control board or the drive. For information about
replacing the control board, contact the manufacturer or your
nearest sales representative.
Note:
• The drive detects this error if the PID feedback input is lower than the level set in b5-13 for longer than b5-14.
• If the drive detects this error, the terminal assigned to H2-01, H2-02, and H2-03 = 4 [Multi-Function Digital Output 1, Multi-Function Digital Output 2, and Multi-Function
Digital Output 3 = Alarm] will be ON.
• If the drive detects this error, it will operate the motor as specified by the stop method set in b5-12 [Fdback Loss Select Mode].
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