
7
-12
CPF21
Option
CPU down
Communications Option Board
Self Diagnostic Error
Communications Option Board fault.
Replace the option board.
CPF22
Option
Type Err
Communications Option Board
Model Code Error
CPF23
Option
DPRAM
Err
Communications Option Board
DPRAM Error
Communications Option Board fault.
Replace the option board.
The copy function of the Digital Opera-
tor was used during communications.
• Use the copy function off-line.
• Use the copy function with an
option board removed.
The option board is not connected prop-
erly.
Turn off the power and insert the
board again.
VCF
Vcn Fail-
ure
Main Circuit Capacitor Neutral
Point Potential Error
An excessive imbalance occurred in
the main circuit capacitor’s neutral
point potential.
A loss in capacity due to aging of the
main circuit capacitor.
Replace the main circuit capacitor.
(Consult your YASKAWA repre-
sentative.)
The Inverter parts are faulty.
Replace the Inverter.
An open phase was detected for an out-
put.
Refer to
LF
(output open phase) in
this table.
Carrier frequency set value (C6-03, C6-
04) is unsuitable.
Check the set values for C6-03 and
C6-04. The maximum output fre-
quency that can be set for 400 V
Class Inverters is restricted by the
carrier frequency setting. Refer to
page 6-46.
In V/f or open-loop vector control, the
motor consecutively loses synchronism
(the output current exceeds 200% of the
Inverter rated current).
• Reduce the load.
• Increase the acceleration time.
• Check the settings for V/f con-
trol.
• Use larger capacity Inverter.
Table 7.1 Fault Displays and Processing (Continued)
Display
Meaning
Probable Causes
Corrective Actions
TOE-S616-60.1.book 12 ページ 2017年8月4日 金曜日 午後3時41分