Corrective Actions Of Models With Digital Operator - Omron V7-IP65 User Manual

Corrective Actions of Models with Digital Operator

: ON : Flashing
Alarm Display
Alarm Display
Digital RUN (Green)
Operator ALARM (Red)
Flashing
Flashing
Flashing
Flashing
: OFF
Alarm Displays and Meaning
Inverter
Status
UV (Main circuit low volt-
Detected as
an alarm
age)
only. Fault
Main circuit DC voltage
contact out-
dropped below the low-volt-
put is not ac-
age detection level while the
tivated.
Inverter output is OFF.
200 V: Main circuit DC volt-
age drops below ap-
prox. 200 V (160 V for
single-phase).
400 V: Main circuit DC volt-
age dropped below
approx. 400 V.
(Control supply fault) Control
power supply fault is detected
while the Inverter output is
OFF.
OV (Main circuit over-
voltage)
Main circuit DC voltage ex-
ceeded the overvoltage de-
tection level while the Inverter
output is OFF.
Detection level:
200 V: approx. 410 V or more
400 V: approx. 820 V or more
OH (Heatsink overheat)
Intake air temperature in-
creased while the Inverter
output is OFF.
CAL (MEMOBUS com-
munications waiting)
Correct data has not been re-
ceived from the PLC when
the constants n003 (Run
Command Selection) is 2 or
n004 (Frequency Reference
Selection) is 6, and power is
turned ON.
Description
Check the following:
•
•
•
•
If there is no problem, the In-
verter may be faulty.
Check the following:
•
•
If there is no problem, the In-
verter may be faulty.
Check the following:
•
•
•
•
Check the following:
•
•
•
•
•
8 Fault Diagnosis
Causes and
Corrective Actions
Power supply voltage
Main circuit power supply
connections
Terminal screws: Loose?
Monitor value
Confirm voltage (DC volt-
age) between terminals
"+1" and "-".
Power supply voltage
Monitor value
Confirm voltage (DC volt-
age) between terminals
"+1" and "-".
Intake air temperature.
There is no thermal
source around the
Inverter and oil stuck to
the fan has not lowered
the cooling capability.
Fan is not clogged.
No foreign matters, such
as water, is inside the
Inverter.
Communications devices
and transmission signals.
PLC is not faulty.
Transmission cable is
connected properly.
Wiring is made properly.
Any loose terminal
screws do not result in
improper contact.
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