YASKAWA VARISPEED-656RC5 User Manual

44
6 TROUBLESHOOTING
6.1 FAULT DETECTION
When the power regenerative unit detects a fault, the fault code is displayed on the
LED monitor, the fault contact output operates.
S When a fault has occurred, refer to the following table to identify and cor-
rect the cause of the fault.
S Reset the fault after restarting the power regenerative unit by turning ON
the fault reset signal or turning the main circuit power supply of and then
on again.
Table 15 Fault Displays and Processing
LED
Meaning
T
rouble
Causes
Corrective
Actions
RUN DS1 DS2 Meaning
Meaning Trouble Causes Corrective Actions
EF
External Fault
An external fault was input from
the contact input terminal.
S Reset the fault from the contact
input terminal.
S Correct the cause of the external
fault.
OL
Power Regenerative Unit Input
Overload
Power regenerative unit input ex-
ceeded the overload capacity.
The load is too heavy. Check the size of the load.
Heatsink Overheating
The temperature of the power re-
The ambient temperature is too
high.
Install a cooling unit.
OH
The
temperature
of
the
power
re
generative unit’s cooling fins ex-
ceeded
the
factory
setting
There is a heat source nearby. Remove the heat source.
cee
d
e
d
t
h
e
f
actory sett
i
ng.
The power regenerative unit’s
cooling fan has stopped.
Replace the cooling fan. (Contact
our sales representative.)
Main Circuit Undervoltage
The main circuit DC voltage is be-
low the undervoltage detection
level.
200 V class : Approx. 190 VDC
400 V class : Approx. 380 VDC
S An open-phase occurred with
the input power supply.
S A momentary power loss oc-
curred.
S The wiring terminals for the in-
put power supply are loose.
S The voltage fluctuations in the
input power supply are too
large.
Reset the fault after correcting its
cause.
UV
Control Power Fault
The control power supply voltage
dropped.

S Try turning the power supply off
and on.
S Replace the power regenerative
unit if the fault continues to oc-
cur.
Inrush Prevention Circuit Fault
A fault occurred in the inrush pre-
vention circuit.

S Try turning the power supply off
and on.
S Replace the power regenerative
unit if the fault continues to oc-
cur.
: ON : Blinking : OFF

YASKAWA VARISPEED-656RC5 Specifications

General

Brand	YASKAWA
Model	VARISPEED-656RC5
Category	Industrial Equipment
Language	English