Diagnosing And Resetting Faults; Fault Occurs Simultaneously With Power Loss; If The Drive Still Has Power After A Fault Occurs; Fault Reset - YASKAWA GA700 Technical Manual

6.9 Diagnosing and Resetting Faults

6.9

Diagnosing and Resetting Faults

When a fault occurs and the drive stops, follow the instructions below to remove whatever conditions triggered
the fault, then restart the drive.
◆

Fault Occurs Simultaneously with Power Loss

WARNING! Crush Hazard. Do not perform work on the drive without eye protection. Wear eye protection before beginning work
on the drive. Failure to comply could result in serious injury.
WARNING! Electrical Shock Hazard. Do not immediately restart the drive or operate any peripheral devices after blowing a fuse
or tripping an Earth Leakage Circuit Breaker (ELCB). Wait for at least the time specified on the warning label and check the
wiring an peripheral device ratings to identify the cause when all indicators are OFF. Contact Yaskawa before restarting the
drive or the peripheral devices if the cause cannot be identified. Failure to comply could 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-xx to display the fault code and data on the operating status of the drive just
before the fault occurred.
3.
Remove the fault refering to Troubleshooting.
Note:
1. To find out what faults were triggered, check the fault history in U2-02 [Previous Fault]. Information on drive status when the fault
occurred such as the frequency, current, and voltage can be found in U2-03 to U2-20.
2. When the fault continues to be displayed after cycling power, remove the cause of the fault and reset.
◆

If the Drive Still has Power After a Fault Occurs

1.
Check the fault code displayed on the keypad.
2.
Remove the fault refering to Troubleshooting.
3.
Execute a fault reset.
◆

Fault Reset

When a fault occurs, the cause of the fault must be removed and the drive must be restarted. The table below lists
the different ways to restart the drive.
Method 1
Method 2
Method 3
Note:
If the Run command is present from a communication option card or control circuit terminal, the drive will disregard any attempts to
reset the fault. Remove the Run command before attempting to clear a fault situation. If a fault reset is executed when a Run command
was present, the minor fault CrST [Cannot Reset] will be displayed on the drive.
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Table 6.3 Fault Reset Methods
Press on the keypad while the keypad
is displaying the error code.
Turn H1-xx = 14 [MFDI Function Select =
Fault Reset] ON.
Note:
The default setting for H1-04 [Terminal
S4 Function Select] is 14 [Fault Reset].
1. Turn off the drive main circuit power
supply.
2. Reapply power after the keypad display
has turned off.
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual