Fault Display - Omron V7-IP65 User Manual

Fault Display

Fault Display
Digital RUN (Green)
Operator ALARM (Red)
196
Fault Displays and Meanings
Inverter
Status
OC (Overcurrent)
Protective
Operation
Inverter output current mo-
Output is
mentarily exceeded approx.
turned OFF
250% of rated current.
and motor
coasts to a
stop.
OV (Main circuit over-
voltage)
Main circuit DC voltage level
exceeded the overvoltage de-
tection level while the Inverter
was running.
Detection level (DC voltage:
Voltage between terminals
"+1" and "-")
200 V: Approx. 410 V or more
400 V: Approx. 820 V or more
UV1 (Main circuit low
voltage)
Main circuit DC voltage
dropped below the low-volt-
age detection level while the
Inverter output is ON.
200 V: Stops at main circuit
400 V: Stops at main circuit
Description
DC voltage below ap-
prox. 200 V (160 V for
single-phase)
DC voltage below ap-
prox. 400 V.
Causes and Corrective
Actions
Operation is restored, if no
fault is found, after confirming
the following:
• Short circuit or grounding
at Inverter output side
• Excessive load GD
• Extremely rapid
Acceleration/Deceleration
Time (constants n019 to
n022)
• Special motor used
• Starting motor during
coasting
• Motor of a capacity
greater than the Inverter
rating has been started.
• Magnetic contactor
opened/closed at the
Inverter output side
• Leak current increased
because of excessively
long wiring
Note: Before turning the pow-
er ON again, make sure that
no short-circuit or ground fault
occurs at the Inverter output.
1. Regenerative energy is
large.
• The setting of decelera-
tion time is too short.
• Negative load (e.g., ele-
vator) is excessive at
lowering.
• Confirm that the load
does not have any prob-
lem.
2. Input voltage is errone-
ous.
Confirm that DC voltage
exceeding the left value
is not input.
Check the following:
• Power supply voltage
• Main circuit power supply
connections
• Terminal screws: Loose?
• Monitor value
Confirm voltage (DC volt-
age) between terminals
"+1" and "-".
If there is no problem, the In-
verter may be faulty.
2