7.9 Diagnosing and Resetting Faults
294 SIEPYEUOQ2A01A AC Drive Q2A Technical Manual
7.9 Diagnosing and Resetting Faults
When a fault occurs and the drive stops, do the procedures in this section to remove the cause of the fault, then re-
energize the drive.
◆ Fault and Power Loss Occur at the Same Time
WARNING! Sudden Movement Hazard. Do not do work on the drive without eye protection. Wear eye protection before you
start work on the drive. Failure to obey could cause serious injury or death.
WARNING! Electrical Shock Hazard. Do not immediately energize the drive or operate peripheral devices after the drive blows
a fuse or trips an RCM/RCD. Wait for the time specified on the warning label at a minimum and make sure that all indicators are
OFF. Then check the wiring and peripheral device ratings to find the cause of the problem. Contact the manufacturer before
energizing the drive or peripheral devices if the cause is not known. Failure to obey can cause death or serious injury and
damage to the drive.
1. Supply power to the control circuit from the external 24 V input.
2. Use monitor parameters U2: FAULT to show the fault code and data about the operating status of the
drive immediately before the fault occurred.
3. Use the information in the Troubleshooting tables to remove the fault.
Note:
1. To find the faults that were triggered, check the fault history in U2-02 [Previous Fault]. To find information about drive status (such
as frequency, current, and voltage) when the faults were triggered, check U2-03 to U2-20.
2. If the fault display stays after you re-energize the drive, remove the cause of the fault and reset.
◆ Fault Occurs Without Power Loss
1.
Examine the fault code shown on the keypad.
2. Use the information in the Troubleshooting tables to remove the fault. Refer to Troubleshooting on page
247.
3. Do a fault reset.
◆ Fault Reset
If a fault occurs, you must remove the cause of the fault and re-energize the drive. The following table lists the
different methods to reset the drive after a fault.
Table 7.3 Fault Reset Methods
Methods Description
1
While the keypad is showing the fault or alarm code, push (Reset) or on the keypad.
2
Switch ON the MFDI terminal set to H1-xx = 7B [MFDI Function Select = Fault Reset].
Note:
The default setting for H1-04 [DI4 Function Selection] is 7B [Fault Reset].
3
1. De-energize the drive main circuit power supply.
2. Energize the drive again after the keypad display goes out.
If the drive receives a Run command from a communication option or control circuit terminal, the drive will not
reset the fault. Remove the Run command then try to clear the fault. If you do a fault reset when the drive has a
Run command, the keypad will show minor fault CrST [Remove RUN Command to Reset].
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