Troubleshooting
7
7.5 Minor Faults/Alarms
SIEPYEUOQ2A01A AC Drive Q2A Technical Manual 277
Code Name Causes Possible Solutions
External Fault [H1-04 = 2C to 2F] is set to MFDI
terminal DI4, 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 [2NO-2CM Func Selection, 3NO-3CM Func Selection, and 4NO-4CM Funct Selection =
Alarm] will be ON.
Code Name Causes Possible Solutions
EF5 External Fault (Terminal DI5)
MFDI terminal DI5 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 DI5.
External Fault [H1-05 = 2C to 2F] is set to MFDI
terminal DI5, 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 [2NO-2CM Func Selection, 3NO-3CM Func Selection, and 4NO-4CM Funct Selection =
Alarm] will be ON.
Code Name Causes Possible Solutions
EF6 External Fault (Terminal DI6)
MFDI terminal DI6 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 DI6.
External Fault [H1-06 = 2C to 2F] is set to MFDI
terminal DI6, 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 [2NO-2CM Func Selection, 3NO-3CM Func Selection, and 4NO-4CM Funct Selection =
Alarm] will be ON.
Code Name Causes Possible Solutions
EF7 External Fault (Terminal DI7)
MFDI terminal DI7 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 DI7.
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 [2NO-2CM Func Selection, 3NO-3CM Func Selection, and 4NO-4CM Funct Selection =
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 [2NO-2CM Func Selection, 3NO-3CM Func Selection, and 4NO-4CM Funct Selection =
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 [2NO-2CM Func Selection, 3NO-3CM Func Selection, and 4NO-4CM Funct Selection =
Alarm] will be ON.
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