Chapter 6 Troubleshooting 85
EV1000 Series General Purpose Variable Speed Drive User Manual
Phenomena
Conditions
Possible reasons of fault
Actions to take
Alarm occurs
Find out the reason and reset.
Single cycle of PLC finishes
Check PLC configuration
Preset length arrives
Clear the actual length value or set F9.14 at
0
Interruption of the
communication between the
drive and host or flush mount
faceplate
Check communication cables and FF.02,
FF.03, FL.12 settings
Power failure
Check the power supply
Command input method
changed
Check the command input method and
corresponding parameter
The drive stops
automatically without
STOP command. The
RUN indicator goes out.
Positive/negative logic of
control terminal changed
Check F7.35.
Auto reset of fault
Check reason of fault and the auto reset
function
Simple PLC pause
Check PLC pause function (terminal)
Interrupt signal feedback from
external devices
Check the configuration of external interrupt
and faulty external devices
Stop at zero-frequency
Check F9.12 and F9.13
Reference frequency is 0
Check the reference frequency
Skip frequency
Check skip frequency
Positive logic, close loop
feedback>reference frequency
Negative logic, close loop
feedback<reference frequency
Check the close loop setting and feedback
Frequency adjustment is set at
0
Check F9.05 and F9.06
Unexpected
stops during
running
The drive stops
automatically without
STOP command. The
RUN indicator is still on,
zero-frequency running
Restart low voltage
compensation function
enabled, and low supply
voltage
Check the configuration of restart and the
input voltage
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