Omron VARISPEED V7 User Manual page 209

Fault Display
Digital RUN (Green)
Operator ALARM (Red)
208
Inverter
Status
UL3 (Undertorque de-
Protective
Operation
tection)
Output is
When V/f mode is selected:
turned OFF
The Inverter's output current
and motor
was less than the Under-
coasts to a
torque Detection Level
stop.
(n118).
When vector mode is select-
ed:
The output current or output
torque was less than the de-
tection level (n097 to n118).
Operation when undertorque
is detected will be determined
by the setting in n117.
EF (External fault)
Inverter receives an external
fault input from control circuit
terminal.
EF0: External fault reference
through MEMOBUS
communications
EF1: External Fault Input
Command from con-
trol circuit terminal S1
EF2: External Fault Input
Command from con-
trol circuit terminal S2
EF3: External Fault Input
Command from con-
trol circuit terminal S3
EF4: External Fault Input
Command from con-
trol circuit terminal S4
EF5: External Fault Input
Command from con-
trol circuit terminal S5 *
EF6: External Fault Input
Command from con-
trol circuit terminal S6 *
EF7: External Fault Input
Command from con-
trol circuit terminal S7
CPF-00
Inverter cannot communicate
with the Digital Operator for 5
s or more when power is
turned ON.
CPF-01
Transmission fault occurred
for 5 s or more when trans-
mission starts with the Digital
Operator.
CPF-04
EEPROM fault of Inverter
control circuit was detected.
Description
Check the following:
Cycle power after confirming
that the Digital Operator is se-
curely mounted. If the fault re-
mains, replace the Digital
Operator or Inverter.
Cycle power after confirming
that the Digital Operator is se-
curely mounted. If the fault re-
mains, replace the Digital
Operator or Inverter.
Causes and Corrective
Actions
• Check the setting in
n118.
• Check the operating
conditions, and remove
the cause.
• NO/NC contact selection
(constant).
• Wiring is made properly.
• Signal is not input from
the PLC.
• Record all constant data
and initialize the con-
stants. (Refer to page
53.)
• Cycle power. If the fault
remains, replace the
Inverter.