Corrective Actions Of Models With Digital Operator - YASKAWA VS mini J7 Series Instruction Manual

<Corrective Actions of Models with Digital Operator>
: ON : BLINKING
Alarm Display
Digital RUN ALARM
Operator (Green) (Red)
U
Blinking
O
Blinking
OH
Blinking
CRL
Blinking
88
: OFF
Alarm Display and Contents
Inverter
Status
UV (Main circuit low voltage)
Main circuit DC voltage
drops below the low-voltage
detection level while the
inverter output is OFF.
200V: Main circuit DC
400V: Main circuit DC
Warning
OV (Main circuit overvoltage)
Fault
Main circuit DC voltage
contacts exceeds the overvoltage
do not detection level while the
change inverter output is OFF.
state.
Detection level :
200V class: approx. 410V or
400V class: approx. 820V or
OH (Cooling fin overheat)
Intake air temperature
rises while the inverter
output is OFF.
CAL (MEMOBUS
communications waiting)
Correct data has not been
received from the PLC
when the constants
n02 (run command
selection) is 2 or
n03 (frequency reference
selection) is 6,
and power is turned ON.
Causes and
Explanation
Corrective Actions
Check the following :
• Power supply voltage
• Main circuit power
supply wiring is
connected.
• Terminal screws are
voltage drops below
securely tightened.
approx. 200V.
(160V for single-
phase)
voltage drops below
approx. 400V.
Check the power supply
voltage.
more
more
Check the intake air
temperature.
Check communication
devices, and transmission
signals.