4-195
Automatic restart operation:
a) Fault is detected. The inverter turn off the output, displays the fault on the keypad and waits for the minimum
baseblock time parameter 07-18 to expire before accepting another run / automatic restart command.
b) After the minimum baseblock time (07-18) and delay time of speed search have expired, the active fault is
reset and a speed search operation is performed. The time between each fault restart attempt is set by
parameter 07-01.
c) When the total number of restart attempts exceed the number of automatic restart attempts set in parameter
07-02, the inverter will turn off the output and the fault contact is activated.
Please refer to Figure 4.4.56 for the automatic restart operation.
Figure 4.4.56 Auto-restart operation.
The automatic restart function is active for the following faults. Please note that when the fault is not listed in the
table the inverter will not attempt an automatic restart.
Parameter
Name
Faults
Numbers of
Restart
07-00
UV
(under voltage)
Unlimited
07-01
07-02
OC
(over current)
OL1
(motor overload)
UT
(Under torque detection)
IPL (input phase loss)
GF
(ground failure)
OV
(overvoltage)
OL2
(Inverter overload)
OT
(Over-torque detection)
OPL
(Output phase loss)
Depend on
parameter
07-02
Notes:
1. Fault restart function contains momentary power loss restart and auto reset restart.
2. Refer to chapter 10 for the details of troubleshooting and fault diagnostics.
3. Refer to speed search function (07-19~07-24) for the selection of speed search modes.
Note:
Automatic restart function is only active in the state of no harm to the safety or to the application devices.
Warning - Excessively use of the automatic restart function will damage the inverter.
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