Emerson EV2000 Series User Manual page 90

86 Chapter 6 Troubleshooting
Phenomena Conditions
No response Part of the keys or
of operation all the keys are
panel disabled
Operating
cannot be changed
Part of parameters
cannot be
changed.
Settings of
parameters
MENU/ESC is
cannot be
disabled
changed
Parameter not
displayed when
pressing
MENU/ESC.
Instead, "0.0.0.0."
is displayed
The drive stops
and its "RUN" LED
is off, while there is
no "STOP"
command
The drive
stops during
operating
process
Motor stops when
there is no
stopping
command, while
the drive's "RUN"
LED illuminates
and operates at
zero frequency
Table 6-2 Abnormal phenomena and handling methods
Possible reasons of fault
Panel is locked up
Panel's cables are not well connected.
Panel's keys are damaged
status Parameter not allowed changing during
operation
FP.01 is set to 1 or 2
Parameter is actually detected, not
allowed changing
Panel is locked up
User's password is required
Fault alarm occurs
Single cycle of PLC operation is
completed
Function of stopping at fixed length is
enabled
Communication between host or remote
mounted keypad and the drive fails
AC supply is interrupted
Control mode is changed
Logic of control terminal changes
Auto-reset upon a fault
PLC operation stops
Stopping command is input from
external terminal
Stops at zero-frequency
Preset frequency is 0
Skip frequency is set incorrectly
EV2000 Series Universal Variable Speed Drive User Manual
Actions
In stopping status, first press
ENTER/DATA and hold on, then press
▼ 3 times continuously to unlock the
panel
Power-on the drive after it shuts down
completely
Check the wiring
Replace operation panel or seek service
Change the parameter at STOP state
Set FP.01 to 0
Do not try to modify these kind of
parameters, they are marked with "*" in
the parameter table in chapter 8.
See "No response of operation panel"
Input correct user's password
Seek service
Find the fault reason and reset the drive
Check the parameter settings of PLC
Clear the information of actual length or
set F9.14 (setting length) to 0
Check the communication circuits and
the settings of FF.02, FF.03 and FL.12
Check the AC supply condition
Check the setting of relevant
parameters
Check the settings of F7.35
Check the setting of auto-reset
Check the terminal used for inputting
signal of stopping PLC operation
Check the setting of this external
terminal
Check the settings of F9.12 and F9.13
Check the frequency setting
Check the setting of skip frequency