YASKAWA CR700 Technical Manual

6.9 Diagnosing and Resetting Faults
382 YASKAWA SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual
6.9 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! Crush Hazard. Wear eye protection when you do work on the drive. If you do not use correct safety equipment, it
can cause serious injury or death.
1. Supply power to the control circuit from the external 24 V input.
2. Use monitor parameters U2-xx to display the fault code and data on the operating status of the drive just
before the fault occurred.
3. Use the information in the Troubleshooting tables to remove the fault.
Note:
1. To find the faults that the drive detected, check the fault history in U2-02 [Previous Fault]. To find information about drive status
(for example. frequency, current, and voltage) when the drive detected the faults, 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.
3. Do a fault reset.
◆ Fault Reset Procedure
If a fault occurs, you must remove the cause of the fault and re-energize the drive. The table below lists the
different methods to reset the drive after a fault.
Table 6.3 Fault Reset Methods
Methods Description
Method 1
While the keypad is showing the fault or alarm code, push on the keypad.
Method 2
Switch ON the MFDI terminal set to H1-xx = 14 [MFDI Function Selection = Fault Reset].
Note:
The default setting for H1-04 [Terminal S4 Function Selection] is 14 [Fault Reset].
Method 3
1. De-energize the drive main circuit power supply.
Note:
If you use an external 24 V power supply, also de-energize the control power supply.
2. Energize the drive again after the keypad display goes out.
Note:
If the drive receives a Run command from a communication option card or control circuit terminal, you cannot use fault reset method 1
and method 2. 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 [Cannot Reset].

YASKAWA CR700 Specifications

General

Brand	YASKAWA
Model	CR700
Category	DC Drives
Language	English