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Chapter 6 Troubleshooting 87
EV2000 Series Universal Variable Speed Drive User Manual
Phenomena
Conditions
Possible reasons of fault
Actions
The drive
stops during
operating
process.
Motor stops without
stopping
command, while
the drive’s “RUN”
LED illuminates
and operates at
zero frequency
Positive logic: close loop feedback
value >reference
Negative logic: close loop feedback
value <reference
Check the close-loop reference and
feedback
F9.05 is set to 0
Check the settings of F9.05 and F9.06
Low-voltage compensation is applied
when the drive restarts after power
failure, besides, the AC supply voltage is
too low
Check the settings of restart after power
failure and the AC supply voltage
The drive
does not work
The drive does not
work and its “RUN”
LED is off when the
“RUN” key is
pressed.
Terminal used for coasting to stop is
enabled
Check the terminal used for coasting to
stop
The terminal used to prohibit the running
of the drive is enabled.
Check the terminal
Terminal used for stopping the drive is
enabled
Check the terminal used for stopping the
drive
The drive stops at fixed length
Check the function of stopping at fixed
length and the actual length
In 3-wire control mode, the terminal
used to control the 3-wire operation is
not closed.
Set and close the terminal
Fault alarm occurs
Clear the fault
Virtual terminal of host is set incorrectly
Disable the function of this terminal or
set it properly via the host or change the
settings of F7.35
Positive and negative logic of input
terminal are not set correctly
Check the settings of F7.35
“POWEROFF”
is reported
when the drive
begin to run
immediately
after
power-on.
Transistor or
contactor
disconnected and
overload
Since the transistor or contactor is
disconnected, the bus voltage drops at
heavier load, therefore, the drive
displays POWEROFF, not E018
message.
Run the drive until the transistor or
contactor is connected.