Omron SYSDRIVE 3G3FV, User Manual, Page: 350 / 400

8-8
Fault Display Probable causes and remedies Meaning
CPF06
Option Error
Optional Card connection error
•
The Optional Card isn’t connected properly.
→
Turn off the power and insert the Card again.
•
The Inverter or Optional Card is faulty.
→
Replace the faulty component.
CPF20
Option A/D Error
Optional Card A/D converter
error
•
The Optional Card isn’t connected properly.
→
Turn off the power and insert the Card again.
•
The Optional Card’s A/D converter is faulty.
→
Replace the Optional Card.
CPF21
Option CPU down
Optional Communications Card
diagnosis error
•
The Optional Communications Card isn’t con-
nected properly.
CPF22
Option Type Err
Optional Communications card
Type error
nected ro erly.
→
Turn off the power and insert the Card again.
•
The Optional Communications Card is faulty
CPF23
Option DPRAM Err
Optional Communications Card
mutual diagnosis error
•
The Optional Communications Card is faulty.
→
Replace the Optional Communications Card.
8-1-2 Minor Fault Detection
Minor faults are a type of Inverter protection function that do not operate the fault contact
output and are automatically returned to their original status once the cause of the minor
fault has been removed. The Digital Operator display flashes and the minor fault is out-
put from the multi-function outputs (H2-01 to H2-03). Take appropriate measures
according to the table below.
H
Minor Fault Displays and Processing
Minor fault display Meaning Probable causes and remedies
EF (flashing)
External Fault
Both the forward and reverse
commands have been ON for
more than 0.5 s.
→
Check the sequence of the forward and reverse
commands.
* Since the rotational direction is unknown, the
motor will be decelerated to a stop when this
minor fault occurs.
UV (flashing)
DC Bus Undervolt
The main circuit DC voltage is
below the undervoltage
detection level (L2-05).
200-V class: Approx. 190 V
400-V class: Approx. 380 V
•
A phase loss occurred with the input power supply.
•
A momentary power interruption occurred.
•
The wiring terminals for the input power supply are
loose.
•
The voltage fluctuations in the input power supply
are too large.
→
Reset the fault after correcting its cause.
OV (flashing)
Overvoltage
The main circuit DC voltage
exceeded the overvoltage
detection level.
200-V class: Approx. 400 V
400-V class: Approx. 800 V
•
The power supply voltage is too high.
→
Decrease the voltage so it’s within specifica-
tions.
Maintenance Operations
Chapter 8