YASKAWA V7 Technical Manual page 117

Table 6-2. Fault Displays and Corrective Actions - Continued
Fault Display
Digital RUN (Green)
Operator ALARM (Red)
Drive
Explanation
Status
CPF-05
A/D converter fault is
detected.
CPF-06
Option card connecting fault
CPF-07
Operator control circuit
(EEPROM or A/D
converter) fault
Protective
Operation.
OPR (Operator
Output is
connecting fault)
shut OFF
and motor
CE (MODBUS
coasts to a
communications fault)
stop.
PF (Input Phase Loss)
Drive input power supply
has an open phase or has
a large imbalance of voltage.
LF (Output Open Phase)
An open phase occurred
at the Drive output.
RH (Dynamic Braking
Resistor)
6-7
Causes and
Corrective Actions
Cycle power.
If the fault remains,
replace the drive.
Remove power to the
drive.
Check the connection
of the digital operator.
Cycle power after checking
the digital operator is
securely mounted.
If the fault remains,
replace the digital operator
or drive.
Cycle power.
If the fault remains,
replace the drive.
Check the communication
devices or communication
signals.
Check input voltage.
Tighten terminal screws.
Check input voltage.
Check the wiring to the
motor.
Check motor for phase to
ground short.
Check motor impedance.